ISSN 1866-8836
Клеточная терапия и трансплантация
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Introduction

Modern chemotherapy protocols and optimal radiotherapy allow to achieve stable remission in ~80% newly diagnosed Hodgkin’s lymphoma (HL) patients [1]. However, a proportion of HL patients has chemoresistant disease or relapse after initial objective response [1, 2]. Further strategy with HL patients includes salvage treatment with high-dose chemotherapy followed by autologous stem cell transplantation (ASCT), and/or antibody-drug conjugate brentuximab vedotin [3, 4]. The patients with failure of second-line treatment have poor prognosis and limited therapeutic options [5]. Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is indicated for the patients with relapsed and refractory (R/R) disease, being able to improve long-term survival and control of the disease [5]. Although allo-HSCT is a potentially curative approach in these patients, a substantial fraction of patients develops relapses and disease progression in posttransplant period, showing strong dependence on the disease status at the time of transplantation [5]. The dysfunction of immune surveillance mechanisms with alteration of PD-1 ligand (PDL-1)-to-PD-1 signaling is considered a defining feature of classical Hodgkin’s lymphoma [6]. nivolumab, a PD-1-blocking antibody, is an immune checkpoint inhibitor, showing high efficiency in patients with relapsed/refractory HL patients after ASCT and brentuximab vedotin treatment with benign toxicity profile. The most specific complications include autoimmune disorders such as pneumonitis, autoimmune hepatitis, hypothyroidism and other disorders [5]. Retrospective data demonstrated that nivolumab treatment for post-allo-HSCT may cause graft-versus-host disease (GVHD) manifestation and aggravation [7, 8, 9]. By contrary, some reports show no signs of GVHD after initiation of anti-PD-1 therapy [10]. Moreover, earlier observations show that, in HL patients after allo-HSCT, nivolumab may lead to profound clinical benefit even if applied at low doses [11]. With respect to previous reports we present retrospective results on seven HL patients relapsing after allo-HSCT subjected to nivolumab administered at different dosing regimens. In all the patients, nivolumab showed clinical efficiency with objective response and considerable toxicity, i.e., immune adverse effects, irrespective of nivolumab dosage, with no cases of GVHD manifestation.

Patients and methods

Our single-center study included seven patients (3 men and 4 women) with relapsed/refractory HL who underwent allo- HSCT. Their median age was 29 years (21 to 43 years old). Baseline characteristics of the patients are shown in Table 1. When entering the study, all the patients signed an informed consent for the use of their medical data for research purposes. The median number of prior therapeutic lines was 9 (8 to 9) including autologous stem cell transplantation (performed in 5/7 patients), and allo-HSCT. Matched HLA-related siblings were used for 3 patients. Four patients had unrelated donors: three of them were HLA-identical and one with 9/10-locus mismatch. Peripheral blood stem cells were transplanted in four patients, and bone marrow, in rest of the cases. Six patients received reduced intensity conditioning (RIC): fludarabine 30 mg/m2/bendamustine 130 mg/m2 per day for 3 days (FluBe) regimen was used in 3 patients, Flu/2 Gy TBI, in 2 patients, and Flu/8 mg/kg busulfan was used in 1 case. In 5/7 patients, the post-transplant cyclophosphamide based regimen was used for GVHD prophylaxis, i.e., cyclophosphamide 50 mg/kg on day +3 and +4 after alloHSCT (PTC) in 2 patients, PTC in combination with tacrolimus started on day + 5 (PTC-Tx) in 1 patient, PTC-Tx with addition of mycophenolate mofetil (MMF) in 2 patients, methotrexate/tacrolimus in 1 case, and antithymocyte globulin/methotrexate/ MMF/cyclosporine A in 1 patient. Objective response determined as CR or PR before allo-HSCT was documented in four patients (3 CR, 1 PR), two patients received transplant during the disease progression. Acute GVHD was reported in 6 patients, with no severe (grade III-IV) cases, and 3 patients had a limited chronic skin GVHD. Median time between the allo-HSCT and disease relapse/progression was 3.3 months (1.5-10). As salvage therapy after allo-HSCT, all patients have received the treatment with brentuximab vedotin, six of them received treatment with bendamustine. Five patients received donor lymphocyte infusions before nivolumab initiation. Median time from allo-HSCT to first injection of nivolumab was 26.7 months (range 7-42.4). One patient has received nivolumab before allo-HSCT, but treatment was discontinued due to grade 4 adverse event (bacterial meningitis). Transplantation modalities and complications are shown in Table 2. By the moment of nivolumab initiation, six patients had disease progression, one patient had stabilization of disease, 6/7 of patients presented with extranodal disease and 3/7 with B-symptoms. None of the patients had signs of GVHD at the moment of treatment initiation. Nivolumab was given as monotherapy at the dose of 3 mg/kg of body weight intravenously every two weeks for two patients. Due to concerns regarding the manifestation of GVHD and immune-related adverse events, the dose were reduced to 1 mg/kg and to the dose of 0.5 mg/kg i.v. every two weeks for 1 patient and for 4 patients, respectively. A median number of nivolumab injections was 7 (1 to 20). The treatment efficacy was assessed by total body PET/CT scan [12] every 3 months after nivolumab initiation or earlier in the event of treatment discontinuation. Toxicities were graded retrospectively according to the National Cancer Institute Common Toxicity Criteria for AEs (version 4.03).

Results

Treatment efficiency

Response to the nivolumab-based therapy was evaluated at a median follow-up time of 14.5 (3.3-22.5) months. Objective response was noted in all the patients at either nivolumab dosage. Complete metabolic response was observed in two patients (28.6%) treated with, respectively, 0.5 and 1 mg/kg of the drug. The rest of this group exhibited partial clinical responses. The maximal response and tumor mass reduction at the best response are shown in Fig. 1. and Fig. 2. The specific B symptoms of lymphoma reported before the therapy were resolved in two of three patients. The objective response was observed after a median of 6 (1-6) nivolumab injections. Four patients (57%) have experienced the disease progression at a median of 6.7 months (5 to 8.5). Two of these patients were re-treated with the same dose of nivolumab, thus allowing to achieve an objective response (CR) in one patient. After monotherapy with nivolumab, three patients underwent further treatment, with addition of bendamustine or other cytostatic agents. At the time of this report, three patients (42.9%) still receive the nivolumab monotherapy. Clinical outcomes are presented in Table 3 and Fig. 3.

28-35_Lepik Table 1. Baseline charasteristics of the patients.png

Toxicity

All the patients were alive at the time of report and were subject to the safety analysis. During nivolumab treatment, 3/7 (42.9%) of the patients experienced grade 3-4 adverse events (AEs), which included two cases of aseptic meningitis (28.6%) and one case of аutoimmune hepatitis, autoimmune hypophysitis. This adverse events manifested after median of 2 (1-2) infusions of the drug. Due to severe adverse events, the nivolumab treatment was discontinued, and patients received short courses of glucocorticoids (1 mg/kg methylprednisolone) with complete resolution of the event. There was no correlation with nivolumab dosing regimen, since severe AEs were observed in patients with different drug dosage (0.5, 1, or 3 mg/kg of body weight). There were no cases of GVHD onset. Notably, the patient who had discontinued nivolumab before allo-HSCT had no adverse events in post-transplant setting. Two patients who discontinued nivolumab treatment due to AE’s, received retreatment after the disease relapse. In one patient with meningitis and hypophisitis, no AE recurrence was revealed later, in another case, a recurrence of autoimmune hepatitis was noted after 2 infusions during the first retreatment. The therapy was again discontinued, and the patient received glucocorticoids followed by complete resolution of hepatitis. The second retreatment was performed with addition of low-dose glucocorticoids in both patients, without AE signs observed.

Discussion

Allo-HSCT is a potentially curative treatment strategy for relapsed and refractory HL patients. Despite novel therapeutic modalities in HL, allogeneic HSCT is remaining an important option. Transplant-related mortality continues to decline owing to lower intensity preparative regimens [13], improved GVHD prophylaxis [5] and novel treatment modalities [4]. At the same time, HL relapse continues to present a significant problem [5]. Therapeutic options are limited in this severely pre-treated group of patients. Common treatment modalities in patients with relapse after allo-HSCT include brentuximab vedotin [14], donor lymphocyte infusions [15] and chemotherapy regimens, such as bendamustine [16] and drug combinations [17-19] with modest results.Therefore, improved post allo-HSCT treatment strategies are needed. Based on biological features of HL, and described mechanisms of graft-versus-lymphoma (GVL) effect, the enhancement of GVL with PD-1 blockade was proposed and demonstrated with several murine models [20, 21] with no GVHD aggravation, and confirmed by early clinical observations [22, 23]. Two retrospective studies [7, 9] of nivolumab salvage treatment in HL relapse after allo-HSCT demonstrate profound activity of this drug (ORR 77%-95%, CR 42%-50%), but also significant toxicity, with high rate of GVHD manifestation (30%-50%) including steroid-refractory and lethal cases of GVHD. The authors conclude that administration of anti-PD-1 after allo-HSCT should be done with extreme caution. This multicenter retrospective studies included mixed population of patients with different types of conditioning regimens and GVHD prophylaxis. Therefore, a strong need for prospective studies with standardized preparative regimens is required.
28-35_Lepik Table 2. Transplantation modalities and complications.png
Another aspect addressed in our retrospective analysis is the dosing regimen for nivolumab. Most data regarding efficiency of nivolumab after allo-HSCT were obtained at a standard dose of 3 mg/kg every two weeks [7, 9]. Meanwhile, its pharmacokinetic studies reveal that the PD-1 peripheral receptor occupancy was saturated at doses as low as 0.3 mg/kg. There are also reports of efficient treatment with lower doses of the drug (0.5 mg/kg) in post allo-HSCT setting [11]. Thus, there is rationale for testing different doses of nivolumab in patients after allo-HSCT.
Here we present a retrospective analysis of 7 patients with HL relapse after allo-HSCT treated with nivolumab at different dosing regimens (0,5-3 mg/kg). All the patients were severely pre-treated with previous therapy (a median of 9 infusions). Most of the patients included into the study (5/7) received the posttransplant cyclophosphamide (PTC)-based GVHD prophylaxis. We demonstrate high efficiency of treatment with 100% ORR in all assessed patients and 28.6% CR rate, irrespective of the nivolumab dosing regimen. Despite high initial response rates, 4 of 7 patients (57%) have experienced disease progression at the median of 6.7 months. Importantly, nivolumab retreatment in two patients was followed by CR achievement in one patient, and clinical improvement in both cases. After median follow up of 14.5 (3.3 to 22.5) months, all the patients are alive with good quality of life.
We did not observe any GVHD onset or exacerbation in our group of patients, possibly due to use of PTC based GVHD prophylaxis regimen and long median time of treatment initiation after alloSCT (26.7 mo), 3/7 patients were experienced grade 3-4 immune AE including aseptic meningitis, hypophysitis and hepatitis. Whether the hepatic involvement was due the autoimmune hepatitis or GVHD is not completely clear, as clinical and histologic differences between GVHD and anti-PD-1 toxicity are not strictly defined. We consider our case of hepatic toxicity as hepatitis associated with anti-PD-1 drug treatment, because it presented with asymptomatic, profound increase in transaminases, while bilirubin level was within reference ranges during the entire observation period, which corresponds to common hepatic AEs induced by PD-1/PD-L1 inhibitors presenting as asymptomatic increase of AST and ALT, and total bilirubin in rare instances [24].

28-35_Lepik Figures 1-3.png

28-35_Lepik Table 3. Clinical outcomes following treatment with different doses of Nivolumab.png

Despite severity of the observed immune AE’s, they regressed shortly after nivolumab discontinuation and initiation of glucocorticoid therapy. Therefore, anti-PD-1 antibodies after allo-HSCT should be administered with caution, and careful monitoring of patient is needed, especially during the first month of anti-PD-1 treatment. Previous reports of treatment with ipilimumab [25, 26] and lower doses of anti-PD-1 antibodies [11], suggested a dose-dependent or context-dependent risk of developing toxicity after the apoptosis checkpoint blockade. During our analysis we did not observed the dependence of the toxicity and effect from nivolumab dosage. Complete metabolic response observed in two patients with 0.5 and 1 mg/kg dosing regimen, and severe AEs was experienced in patients with 0.5, 1, 3 mg/kg. The results obtained with anti-PD therapy of Hodgkin’s disease should be compared with efficiency of Brentuximab, an immunotoxic drug targeted for CD30 antigen on tumor cells [27]. It proved to be highly efficient in resistant/relapsed cases of HD being currently under extensive trials [28-30]. Its combined effects with anti-PD drugs deserve further studies.

Conclusion

Our retrospective analysis of nivolumab treatment at different single dosages concerned post-allo-HSCT patients who developed HL relapse. We have confirmed clinical efficacy of nivolumab, however, with induction of severe-grade 3-4 immune AEs in three patients subjected to different dosing regimens (0.5, 1, 3 mg/kg), but without any documented GVHD cases. The prospective studies are warranted, aiming for establishment of optimal dosing regimens, as well as potential effects of conditioning and GVHD prophylaxis upon the risks and benefits of nivolumab treatment after allo-HSCT.

Conflict of interest

The authors report no conflicts of interest.

References

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Introduction

Modern chemotherapy protocols and optimal radiotherapy allow to achieve stable remission in ~80% newly diagnosed Hodgkin’s lymphoma (HL) patients [1]. However, a proportion of HL patients has chemoresistant disease or relapse after initial objective response [1, 2]. Further strategy with HL patients includes salvage treatment with high-dose chemotherapy followed by autologous stem cell transplantation (ASCT), and/or antibody-drug conjugate brentuximab vedotin [3, 4]. The patients with failure of second-line treatment have poor prognosis and limited therapeutic options [5]. Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is indicated for the patients with relapsed and refractory (R/R) disease, being able to improve long-term survival and control of the disease [5]. Although allo-HSCT is a potentially curative approach in these patients, a substantial fraction of patients develops relapses and disease progression in posttransplant period, showing strong dependence on the disease status at the time of transplantation [5]. The dysfunction of immune surveillance mechanisms with alteration of PD-1 ligand (PDL-1)-to-PD-1 signaling is considered a defining feature of classical Hodgkin’s lymphoma [6]. nivolumab, a PD-1-blocking antibody, is an immune checkpoint inhibitor, showing high efficiency in patients with relapsed/refractory HL patients after ASCT and brentuximab vedotin treatment with benign toxicity profile. The most specific complications include autoimmune disorders such as pneumonitis, autoimmune hepatitis, hypothyroidism and other disorders [5]. Retrospective data demonstrated that nivolumab treatment for post-allo-HSCT may cause graft-versus-host disease (GVHD) manifestation and aggravation [7, 8, 9]. By contrary, some reports show no signs of GVHD after initiation of anti-PD-1 therapy [10]. Moreover, earlier observations show that, in HL patients after allo-HSCT, nivolumab may lead to profound clinical benefit even if applied at low doses [11]. With respect to previous reports we present retrospective results on seven HL patients relapsing after allo-HSCT subjected to nivolumab administered at different dosing regimens. In all the patients, nivolumab showed clinical efficiency with objective response and considerable toxicity, i.e., immune adverse effects, irrespective of nivolumab dosage, with no cases of GVHD manifestation.

Patients and methods

Our single-center study included seven patients (3 men and 4 women) with relapsed/refractory HL who underwent allo- HSCT. Their median age was 29 years (21 to 43 years old). Baseline characteristics of the patients are shown in Table 1. When entering the study, all the patients signed an informed consent for the use of their medical data for research purposes. The median number of prior therapeutic lines was 9 (8 to 9) including autologous stem cell transplantation (performed in 5/7 patients), and allo-HSCT. Matched HLA-related siblings were used for 3 patients. Four patients had unrelated donors: three of them were HLA-identical and one with 9/10-locus mismatch. Peripheral blood stem cells were transplanted in four patients, and bone marrow, in rest of the cases. Six patients received reduced intensity conditioning (RIC): fludarabine 30 mg/m2/bendamustine 130 mg/m2 per day for 3 days (FluBe) regimen was used in 3 patients, Flu/2 Gy TBI, in 2 patients, and Flu/8 mg/kg busulfan was used in 1 case. In 5/7 patients, the post-transplant cyclophosphamide based regimen was used for GVHD prophylaxis, i.e., cyclophosphamide 50 mg/kg on day +3 and +4 after alloHSCT (PTC) in 2 patients, PTC in combination with tacrolimus started on day + 5 (PTC-Tx) in 1 patient, PTC-Tx with addition of mycophenolate mofetil (MMF) in 2 patients, methotrexate/tacrolimus in 1 case, and antithymocyte globulin/methotrexate/ MMF/cyclosporine A in 1 patient. Objective response determined as CR or PR before allo-HSCT was documented in four patients (3 CR, 1 PR), two patients received transplant during the disease progression. Acute GVHD was reported in 6 patients, with no severe (grade III-IV) cases, and 3 patients had a limited chronic skin GVHD. Median time between the allo-HSCT and disease relapse/progression was 3.3 months (1.5-10). As salvage therapy after allo-HSCT, all patients have received the treatment with brentuximab vedotin, six of them received treatment with bendamustine. Five patients received donor lymphocyte infusions before nivolumab initiation. Median time from allo-HSCT to first injection of nivolumab was 26.7 months (range 7-42.4). One patient has received nivolumab before allo-HSCT, but treatment was discontinued due to grade 4 adverse event (bacterial meningitis). Transplantation modalities and complications are shown in Table 2. By the moment of nivolumab initiation, six patients had disease progression, one patient had stabilization of disease, 6/7 of patients presented with extranodal disease and 3/7 with B-symptoms. None of the patients had signs of GVHD at the moment of treatment initiation. Nivolumab was given as monotherapy at the dose of 3 mg/kg of body weight intravenously every two weeks for two patients. Due to concerns regarding the manifestation of GVHD and immune-related adverse events, the dose were reduced to 1 mg/kg and to the dose of 0.5 mg/kg i.v. every two weeks for 1 patient and for 4 patients, respectively. A median number of nivolumab injections was 7 (1 to 20). The treatment efficacy was assessed by total body PET/CT scan [12] every 3 months after nivolumab initiation or earlier in the event of treatment discontinuation. Toxicities were graded retrospectively according to the National Cancer Institute Common Toxicity Criteria for AEs (version 4.03).

Results

Treatment efficiency

Response to the nivolumab-based therapy was evaluated at a median follow-up time of 14.5 (3.3-22.5) months. Objective response was noted in all the patients at either nivolumab dosage. Complete metabolic response was observed in two patients (28.6%) treated with, respectively, 0.5 and 1 mg/kg of the drug. The rest of this group exhibited partial clinical responses. The maximal response and tumor mass reduction at the best response are shown in Fig. 1. and Fig. 2. The specific B symptoms of lymphoma reported before the therapy were resolved in two of three patients. The objective response was observed after a median of 6 (1-6) nivolumab injections. Four patients (57%) have experienced the disease progression at a median of 6.7 months (5 to 8.5). Two of these patients were re-treated with the same dose of nivolumab, thus allowing to achieve an objective response (CR) in one patient. After monotherapy with nivolumab, three patients underwent further treatment, with addition of bendamustine or other cytostatic agents. At the time of this report, three patients (42.9%) still receive the nivolumab monotherapy. Clinical outcomes are presented in Table 3 and Fig. 3.

28-35_Lepik Table 1. Baseline charasteristics of the patients.png

Toxicity

All the patients were alive at the time of report and were subject to the safety analysis. During nivolumab treatment, 3/7 (42.9%) of the patients experienced grade 3-4 adverse events (AEs), which included two cases of aseptic meningitis (28.6%) and one case of аutoimmune hepatitis, autoimmune hypophysitis. This adverse events manifested after median of 2 (1-2) infusions of the drug. Due to severe adverse events, the nivolumab treatment was discontinued, and patients received short courses of glucocorticoids (1 mg/kg methylprednisolone) with complete resolution of the event. There was no correlation with nivolumab dosing regimen, since severe AEs were observed in patients with different drug dosage (0.5, 1, or 3 mg/kg of body weight). There were no cases of GVHD onset. Notably, the patient who had discontinued nivolumab before allo-HSCT had no adverse events in post-transplant setting. Two patients who discontinued nivolumab treatment due to AE’s, received retreatment after the disease relapse. In one patient with meningitis and hypophisitis, no AE recurrence was revealed later, in another case, a recurrence of autoimmune hepatitis was noted after 2 infusions during the first retreatment. The therapy was again discontinued, and the patient received glucocorticoids followed by complete resolution of hepatitis. The second retreatment was performed with addition of low-dose glucocorticoids in both patients, without AE signs observed.

Discussion

Allo-HSCT is a potentially curative treatment strategy for relapsed and refractory HL patients. Despite novel therapeutic modalities in HL, allogeneic HSCT is remaining an important option. Transplant-related mortality continues to decline owing to lower intensity preparative regimens [13], improved GVHD prophylaxis [5] and novel treatment modalities [4]. At the same time, HL relapse continues to present a significant problem [5]. Therapeutic options are limited in this severely pre-treated group of patients. Common treatment modalities in patients with relapse after allo-HSCT include brentuximab vedotin [14], donor lymphocyte infusions [15] and chemotherapy regimens, such as bendamustine [16] and drug combinations [17-19] with modest results.Therefore, improved post allo-HSCT treatment strategies are needed. Based on biological features of HL, and described mechanisms of graft-versus-lymphoma (GVL) effect, the enhancement of GVL with PD-1 blockade was proposed and demonstrated with several murine models [20, 21] with no GVHD aggravation, and confirmed by early clinical observations [22, 23]. Two retrospective studies [7, 9] of nivolumab salvage treatment in HL relapse after allo-HSCT demonstrate profound activity of this drug (ORR 77%-95%, CR 42%-50%), but also significant toxicity, with high rate of GVHD manifestation (30%-50%) including steroid-refractory and lethal cases of GVHD. The authors conclude that administration of anti-PD-1 after allo-HSCT should be done with extreme caution. This multicenter retrospective studies included mixed population of patients with different types of conditioning regimens and GVHD prophylaxis. Therefore, a strong need for prospective studies with standardized preparative regimens is required.
28-35_Lepik Table 2. Transplantation modalities and complications.png
Another aspect addressed in our retrospective analysis is the dosing regimen for nivolumab. Most data regarding efficiency of nivolumab after allo-HSCT were obtained at a standard dose of 3 mg/kg every two weeks [7, 9]. Meanwhile, its pharmacokinetic studies reveal that the PD-1 peripheral receptor occupancy was saturated at doses as low as 0.3 mg/kg. There are also reports of efficient treatment with lower doses of the drug (0.5 mg/kg) in post allo-HSCT setting [11]. Thus, there is rationale for testing different doses of nivolumab in patients after allo-HSCT.
Here we present a retrospective analysis of 7 patients with HL relapse after allo-HSCT treated with nivolumab at different dosing regimens (0,5-3 mg/kg). All the patients were severely pre-treated with previous therapy (a median of 9 infusions). Most of the patients included into the study (5/7) received the posttransplant cyclophosphamide (PTC)-based GVHD prophylaxis. We demonstrate high efficiency of treatment with 100% ORR in all assessed patients and 28.6% CR rate, irrespective of the nivolumab dosing regimen. Despite high initial response rates, 4 of 7 patients (57%) have experienced disease progression at the median of 6.7 months. Importantly, nivolumab retreatment in two patients was followed by CR achievement in one patient, and clinical improvement in both cases. After median follow up of 14.5 (3.3 to 22.5) months, all the patients are alive with good quality of life.
We did not observe any GVHD onset or exacerbation in our group of patients, possibly due to use of PTC based GVHD prophylaxis regimen and long median time of treatment initiation after alloSCT (26.7 mo), 3/7 patients were experienced grade 3-4 immune AE including aseptic meningitis, hypophysitis and hepatitis. Whether the hepatic involvement was due the autoimmune hepatitis or GVHD is not completely clear, as clinical and histologic differences between GVHD and anti-PD-1 toxicity are not strictly defined. We consider our case of hepatic toxicity as hepatitis associated with anti-PD-1 drug treatment, because it presented with asymptomatic, profound increase in transaminases, while bilirubin level was within reference ranges during the entire observation period, which corresponds to common hepatic AEs induced by PD-1/PD-L1 inhibitors presenting as asymptomatic increase of AST and ALT, and total bilirubin in rare instances [24].

28-35_Lepik Figures 1-3.png

28-35_Lepik Table 3. Clinical outcomes following treatment with different doses of Nivolumab.png

Despite severity of the observed immune AE’s, they regressed shortly after nivolumab discontinuation and initiation of glucocorticoid therapy. Therefore, anti-PD-1 antibodies after allo-HSCT should be administered with caution, and careful monitoring of patient is needed, especially during the first month of anti-PD-1 treatment. Previous reports of treatment with ipilimumab [25, 26] and lower doses of anti-PD-1 antibodies [11], suggested a dose-dependent or context-dependent risk of developing toxicity after the apoptosis checkpoint blockade. During our analysis we did not observed the dependence of the toxicity and effect from nivolumab dosage. Complete metabolic response observed in two patients with 0.5 and 1 mg/kg dosing regimen, and severe AEs was experienced in patients with 0.5, 1, 3 mg/kg. The results obtained with anti-PD therapy of Hodgkin’s disease should be compared with efficiency of Brentuximab, an immunotoxic drug targeted for CD30 antigen on tumor cells [27]. It proved to be highly efficient in resistant/relapsed cases of HD being currently under extensive trials [28-30]. Its combined effects with anti-PD drugs deserve further studies.

Conclusion

Our retrospective analysis of nivolumab treatment at different single dosages concerned post-allo-HSCT patients who developed HL relapse. We have confirmed clinical efficacy of nivolumab, however, with induction of severe-grade 3-4 immune AEs in three patients subjected to different dosing regimens (0.5, 1, 3 mg/kg), but without any documented GVHD cases. The prospective studies are warranted, aiming for establishment of optimal dosing regimens, as well as potential effects of conditioning and GVHD prophylaxis upon the risks and benefits of nivolumab treatment after allo-HSCT.

Conflict of interest

The authors report no conflicts of interest.

References

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Несмотря на это, рецидив и прогрессирование заболевания в посттрансплантационном периоде происходит у значимой части пациентов. Ниволумаб представляет собой препарат моноклональных антител, блокирующих рецептор программируемой гибели 1 (PD-1), который показал высокую эффективность у пациентов с р/р ЛХ перед и после алло-ТГСК. Мы ретроспективно оценили эффективность и токсичность терапии ниволумабом в монорежиме у 7 пациентов с рецидивами ЛХ после алло-ТГСК в различных режимах дозирования (0,5-3 мг/кг) с кратностью введения каждые 2 недели. В нашей группе не было отмечено случаев возникновения РТПХ на фоне лечения ниволумабом. Вне зависимости от режима дозирования, объективный ответ на терапию отмечен у всех пациентов (100%). Полный метаболический ответ наблюдался у двух пациентов (28.6%) с режимом дозирования 0.5 и 1 мг/кг. Во время лечения ниволумабом у 3/7 (42,9%) пациентов наблюдались иммунные нежелательные явления (НЯ) 3-4 степени тяжести. 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Р. М. Горбачевой; кафедра гематологии, трансфузиологиии трансплантологии, Первый Санкт-Петербургский государственный медицинский университет им. И. П. Павлова, Санкт-Петербург, Российская Федерация" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(471) "НИИ детской онкологии, гематологии и трансплантологии им. Р. М. Горбачевой; кафедра гематологии, трансфузиологиии трансплантологии, Первый Санкт-Петербургский государственный медицинский университет им. И. П. Павлова, Санкт-Петербург, Российская Федерация" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(22) "Организации" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_RU"]=> array(36) { ["ID"]=> string(2) "27" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(29) "Описание/Резюме" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "27" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20261" ["VALUE"]=> array(2) { ["TEXT"]=> string(3338) "<p style="text-align: justify;"> Аллогенная трансплантация гемопоэтических клеток (алло-ТГСК) обладает потенциалом излечения пациентов с рецидивирующей и рефрактерной лимфомой Ходжкина (р/р ЛХ). Несмотря на это, рецидив и прогрессирование заболевания в посттрансплантационном периоде происходит у значимой части пациентов. Ниволумаб представляет собой препарат моноклональных антител, блокирующих рецептор программируемой гибели 1 (PD-1), который показал высокую эффективность у пациентов с р/р ЛХ перед и после алло-ТГСК. Мы ретроспективно оценили эффективность и токсичность терапии ниволумабом в монорежиме у 7 пациентов с рецидивами ЛХ после алло-ТГСК в различных режимах дозирования (0,5-3 мг/кг) с кратностью введения каждые 2 недели. В нашей группе не было отмечено случаев возникновения РТПХ на фоне лечения ниволумабом. Вне зависимости от режима дозирования, объективный ответ на терапию отмечен у всех пациентов (100%). Полный метаболический ответ наблюдался у двух пациентов (28.6%) с режимом дозирования 0.5 и 1 мг/кг. Во время лечения ниволумабом у 3/7 (42,9%) пациентов наблюдались иммунные нежелательные явления (НЯ) 3-4 степени тяжести. Тяжелые НЯ отмечались у пациентов с различными режимами дозирования (0,5; 1 или 3 мг/кг. Отмечался полный регресс НЯ на фоне терапии люкокортикостероидами. Все пациенты были живы на момент анализа. У 4/7 пациентов отмечался рецидив заболевания через 7 (5-9) месяцев после начала терапии ниволумабом. Таким образом, ниволумаб может быть эффективным терапевтическим подходом у пациентов с рецидивом ЛХ после алло-ТГСК, с риском проявления иммунной токсичности в ряде случаев. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Лимфома Ходжкина, аллогенная трансплантация гемопоэтических клеток, рецидив, ингибиторы контрольных точек, ниволумаб, дозировка. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(3272) "

Аллогенная трансплантация гемопоэтических клеток (алло-ТГСК) обладает потенциалом излечения пациентов с рецидивирующей и рефрактерной лимфомой Ходжкина (р/р ЛХ). Несмотря на это, рецидив и прогрессирование заболевания в посттрансплантационном периоде происходит у значимой части пациентов. Ниволумаб представляет собой препарат моноклональных антител, блокирующих рецептор программируемой гибели 1 (PD-1), который показал высокую эффективность у пациентов с р/р ЛХ перед и после алло-ТГСК. Мы ретроспективно оценили эффективность и токсичность терапии ниволумабом в монорежиме у 7 пациентов с рецидивами ЛХ после алло-ТГСК в различных режимах дозирования (0,5-3 мг/кг) с кратностью введения каждые 2 недели. В нашей группе не было отмечено случаев возникновения РТПХ на фоне лечения ниволумабом. Вне зависимости от режима дозирования, объективный ответ на терапию отмечен у всех пациентов (100%). Полный метаболический ответ наблюдался у двух пациентов (28.6%) с режимом дозирования 0.5 и 1 мг/кг. Во время лечения ниволумабом у 3/7 (42,9%) пациентов наблюдались иммунные нежелательные явления (НЯ) 3-4 степени тяжести. Тяжелые НЯ отмечались у пациентов с различными режимами дозирования (0,5; 1 или 3 мг/кг. Отмечался полный регресс НЯ на фоне терапии люкокортикостероидами. Все пациенты были живы на момент анализа. У 4/7 пациентов отмечался рецидив заболевания через 7 (5-9) месяцев после начала терапии ниволумабом. Таким образом, ниволумаб может быть эффективным терапевтическим подходом у пациентов с рецидивом ЛХ после алло-ТГСК, с риском проявления иммунной токсичности в ряде случаев.

Ключевые слова

Лимфома Ходжкина, аллогенная трансплантация гемопоэтических клеток, рецидив, ингибиторы контрольных точек, ниволумаб, дозировка.

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Lepik, Andrey V. Kozlov, Evgeniya S. Borzenkova, Marina O. Popova, Ivan S. Moiseev, Elena I. Darskaya, Asmik G. Gevorgyan, Luibov A. Tsvetkova, Sergey N. Bondarenko, Alexander L. Alyanskiy, Elena V. Kondakova, Natalya B. Mikhailova, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(263) "Kirill V. Lepik, Andrey V. Kozlov, Evgeniya S. Borzenkova, Marina O. Popova, Ivan S. Moiseev, Elena I. Darskaya, Asmik G. Gevorgyan, Luibov A. Tsvetkova, Sergey N. Bondarenko, Alexander L. Alyanskiy, Elena V. Kondakova, Natalya B. Mikhailova, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(6) "Author" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["ORGANIZATION_EN"]=> array(36) { ["ID"]=> string(2) "38" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(12) "Organization" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(15) "ORGANIZATION_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "38" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20201" ["VALUE"]=> array(2) { ["TEXT"]=> string(257) "R. M. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, Chair of Hematology, Transfusiology and Transplantology, The First St. Petersburg State I. P. Pavlov Medical University, Roentgen St. 12; 197022, St. Petersburg,Russia" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(257) "R. M. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, Chair of Hematology, Transfusiology and Transplantology, The First St. Petersburg State I. P. Pavlov Medical University, Roentgen St. 12; 197022, St. Petersburg,Russia" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(12) "Organization" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_EN"]=> array(36) { ["ID"]=> string(2) "39" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(21) "Description / Summary" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "39" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20202" ["VALUE"]=> array(2) { ["TEXT"]=> string(1872) "<p style="text-align: justify;"> Allogeneic hematopoietic cell transplantation (alloHSCT) is a potentially curative treatment for patients with relapsed and refractory Hodgkin lymphoma (HL) followed by long-term survival. However, relapse and progression of disease in the post-transplant period may occur in a substantial number of patients. nivolumab, an antibody blocking the programmed cell death receptor 1 (PD-1) has shown high efficiency in patients with HL in pre- and post-allo-HSCT setting. We have retrospectively assessed efficacy and toxicity of nivolumab as a single agent in seven HL patients relapsing after allo-HSCT using the drug at different doses (0.5 to 3 mg/kg body mass) administered every 2 weeks. We did not observe any cases of graft-versus-host disease (GVHD) after nivolumab initiation. An objective clinical response to the therapy was noted in all patients (100%), at any dosing regimen. Complete metabolic response, as detected by PET/CT, was observed in two patients (28.6%) treated at 0.5 and 1 mg/kg. Three patients of seven (42.9%) experienced grade 3-4 grade adverse events (AEs) from nivolumab, which included immune disorders. There was no correlation with nivolumab dosing regimen since severe AEs were documented in patients treated at 0.5, 1, or 3 mg/kg. All the patients are alive by the time of evaluation, 4/7 patients had the disease relapse at a median of 7 months (5 to 9) after initiation of the treatment. nivolumab may represent an efficient therapeutic tool in patients with HL relapse after allo-HSCT, however, followed by a considerable toxicity in some cases. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Hodgkin’s lymphoma, allo-HSCT, relapse, immune checkpoints inhibitors, nivolumab, dosage. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(1806) "

Allogeneic hematopoietic cell transplantation (alloHSCT) is a potentially curative treatment for patients with relapsed and refractory Hodgkin lymphoma (HL) followed by long-term survival. However, relapse and progression of disease in the post-transplant period may occur in a substantial number of patients. nivolumab, an antibody blocking the programmed cell death receptor 1 (PD-1) has shown high efficiency in patients with HL in pre- and post-allo-HSCT setting. We have retrospectively assessed efficacy and toxicity of nivolumab as a single agent in seven HL patients relapsing after allo-HSCT using the drug at different doses (0.5 to 3 mg/kg body mass) administered every 2 weeks. We did not observe any cases of graft-versus-host disease (GVHD) after nivolumab initiation. An objective clinical response to the therapy was noted in all patients (100%), at any dosing regimen. Complete metabolic response, as detected by PET/CT, was observed in two patients (28.6%) treated at 0.5 and 1 mg/kg. Three patients of seven (42.9%) experienced grade 3-4 grade adverse events (AEs) from nivolumab, which included immune disorders. There was no correlation with nivolumab dosing regimen since severe AEs were documented in patients treated at 0.5, 1, or 3 mg/kg. All the patients are alive by the time of evaluation, 4/7 patients had the disease relapse at a median of 7 months (5 to 9) after initiation of the treatment. nivolumab may represent an efficient therapeutic tool in patients with HL relapse after allo-HSCT, however, followed by a considerable toxicity in some cases.

Keywords

Hodgkin’s lymphoma, allo-HSCT, relapse, immune checkpoints inhibitors, nivolumab, dosage.

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However, relapse and progression of disease in the post-transplant period may occur in a substantial number of patients. nivolumab, an antibody blocking the programmed cell death receptor 1 (PD-1) has shown high efficiency in patients with HL in pre- and post-allo-HSCT setting. We have retrospectively assessed efficacy and toxicity of nivolumab as a single agent in seven HL patients relapsing after allo-HSCT using the drug at different doses (0.5 to 3 mg/kg body mass) administered every 2 weeks. We did not observe any cases of graft-versus-host disease (GVHD) after nivolumab initiation. An objective clinical response to the therapy was noted in all patients (100%), at any dosing regimen. Complete metabolic response, as detected by PET/CT, was observed in two patients (28.6%) treated at 0.5 and 1 mg/kg. Three patients of seven (42.9%) experienced grade 3-4 grade adverse events (AEs) from nivolumab, which included immune disorders. There was no correlation with nivolumab dosing regimen since severe AEs were documented in patients treated at 0.5, 1, or 3 mg/kg. All the patients are alive by the time of evaluation, 4/7 patients had the disease relapse at a median of 7 months (5 to 9) after initiation of the treatment. nivolumab may represent an efficient therapeutic tool in patients with HL relapse after allo-HSCT, however, followed by a considerable toxicity in some cases. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Hodgkin’s lymphoma, allo-HSCT, relapse, immune checkpoints inhibitors, nivolumab, dosage. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(1806) "

Allogeneic hematopoietic cell transplantation (alloHSCT) is a potentially curative treatment for patients with relapsed and refractory Hodgkin lymphoma (HL) followed by long-term survival. However, relapse and progression of disease in the post-transplant period may occur in a substantial number of patients. nivolumab, an antibody blocking the programmed cell death receptor 1 (PD-1) has shown high efficiency in patients with HL in pre- and post-allo-HSCT setting. We have retrospectively assessed efficacy and toxicity of nivolumab as a single agent in seven HL patients relapsing after allo-HSCT using the drug at different doses (0.5 to 3 mg/kg body mass) administered every 2 weeks. We did not observe any cases of graft-versus-host disease (GVHD) after nivolumab initiation. An objective clinical response to the therapy was noted in all patients (100%), at any dosing regimen. Complete metabolic response, as detected by PET/CT, was observed in two patients (28.6%) treated at 0.5 and 1 mg/kg. Three patients of seven (42.9%) experienced grade 3-4 grade adverse events (AEs) from nivolumab, which included immune disorders. There was no correlation with nivolumab dosing regimen since severe AEs were documented in patients treated at 0.5, 1, or 3 mg/kg. All the patients are alive by the time of evaluation, 4/7 patients had the disease relapse at a median of 7 months (5 to 9) after initiation of the treatment. nivolumab may represent an efficient therapeutic tool in patients with HL relapse after allo-HSCT, however, followed by a considerable toxicity in some cases.

Keywords

Hodgkin’s lymphoma, allo-HSCT, relapse, immune checkpoints inhibitors, nivolumab, dosage.

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Allogeneic hematopoietic cell transplantation (alloHSCT) is a potentially curative treatment for patients with relapsed and refractory Hodgkin lymphoma (HL) followed by long-term survival. However, relapse and progression of disease in the post-transplant period may occur in a substantial number of patients. nivolumab, an antibody blocking the programmed cell death receptor 1 (PD-1) has shown high efficiency in patients with HL in pre- and post-allo-HSCT setting. We have retrospectively assessed efficacy and toxicity of nivolumab as a single agent in seven HL patients relapsing after allo-HSCT using the drug at different doses (0.5 to 3 mg/kg body mass) administered every 2 weeks. We did not observe any cases of graft-versus-host disease (GVHD) after nivolumab initiation. An objective clinical response to the therapy was noted in all patients (100%), at any dosing regimen. Complete metabolic response, as detected by PET/CT, was observed in two patients (28.6%) treated at 0.5 and 1 mg/kg. Three patients of seven (42.9%) experienced grade 3-4 grade adverse events (AEs) from nivolumab, which included immune disorders. There was no correlation with nivolumab dosing regimen since severe AEs were documented in patients treated at 0.5, 1, or 3 mg/kg. All the patients are alive by the time of evaluation, 4/7 patients had the disease relapse at a median of 7 months (5 to 9) after initiation of the treatment. nivolumab may represent an efficient therapeutic tool in patients with HL relapse after allo-HSCT, however, followed by a considerable toxicity in some cases.

Keywords

Hodgkin’s lymphoma, allo-HSCT, relapse, immune checkpoints inhibitors, nivolumab, dosage.

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Несмотря на это, рецидив и прогрессирование заболевания в посттрансплантационном периоде происходит у значимой части пациентов. Ниволумаб представляет собой препарат моноклональных антител, блокирующих рецептор программируемой гибели 1 (PD-1), который показал высокую эффективность у пациентов с р/р ЛХ перед и после алло-ТГСК. Мы ретроспективно оценили эффективность и токсичность терапии ниволумабом в монорежиме у 7 пациентов с рецидивами ЛХ после алло-ТГСК в различных режимах дозирования (0,5-3 мг/кг) с кратностью введения каждые 2 недели. В нашей группе не было отмечено случаев возникновения РТПХ на фоне лечения ниволумабом. Вне зависимости от режима дозирования, объективный ответ на терапию отмечен у всех пациентов (100%). Полный метаболический ответ наблюдался у двух пациентов (28.6%) с режимом дозирования 0.5 и 1 мг/кг. Во время лечения ниволумабом у 3/7 (42,9%) пациентов наблюдались иммунные нежелательные явления (НЯ) 3-4 степени тяжести. Тяжелые НЯ отмечались у пациентов с различными режимами дозирования (0,5; 1 или 3 мг/кг. Отмечался полный регресс НЯ на фоне терапии люкокортикостероидами. Все пациенты были живы на момент анализа. У 4/7 пациентов отмечался рецидив заболевания через 7 (5-9) месяцев после начала терапии ниволумабом. Таким образом, ниволумаб может быть эффективным терапевтическим подходом у пациентов с рецидивом ЛХ после алло-ТГСК, с риском проявления иммунной токсичности в ряде случаев. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Лимфома Ходжкина, аллогенная трансплантация гемопоэтических клеток, рецидив, ингибиторы контрольных точек, ниволумаб, дозировка. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(3272) "

Аллогенная трансплантация гемопоэтических клеток (алло-ТГСК) обладает потенциалом излечения пациентов с рецидивирующей и рефрактерной лимфомой Ходжкина (р/р ЛХ). Несмотря на это, рецидив и прогрессирование заболевания в посттрансплантационном периоде происходит у значимой части пациентов. Ниволумаб представляет собой препарат моноклональных антител, блокирующих рецептор программируемой гибели 1 (PD-1), который показал высокую эффективность у пациентов с р/р ЛХ перед и после алло-ТГСК. Мы ретроспективно оценили эффективность и токсичность терапии ниволумабом в монорежиме у 7 пациентов с рецидивами ЛХ после алло-ТГСК в различных режимах дозирования (0,5-3 мг/кг) с кратностью введения каждые 2 недели. В нашей группе не было отмечено случаев возникновения РТПХ на фоне лечения ниволумабом. Вне зависимости от режима дозирования, объективный ответ на терапию отмечен у всех пациентов (100%). Полный метаболический ответ наблюдался у двух пациентов (28.6%) с режимом дозирования 0.5 и 1 мг/кг. Во время лечения ниволумабом у 3/7 (42,9%) пациентов наблюдались иммунные нежелательные явления (НЯ) 3-4 степени тяжести. Тяжелые НЯ отмечались у пациентов с различными режимами дозирования (0,5; 1 или 3 мг/кг. Отмечался полный регресс НЯ на фоне терапии люкокортикостероидами. Все пациенты были живы на момент анализа. У 4/7 пациентов отмечался рецидив заболевания через 7 (5-9) месяцев после начала терапии ниволумабом. Таким образом, ниволумаб может быть эффективным терапевтическим подходом у пациентов с рецидивом ЛХ после алло-ТГСК, с риском проявления иммунной токсичности в ряде случаев.

Ключевые слова

Лимфома Ходжкина, аллогенная трансплантация гемопоэтических клеток, рецидив, ингибиторы контрольных точек, ниволумаб, дозировка.

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Аллогенная трансплантация гемопоэтических клеток (алло-ТГСК) обладает потенциалом излечения пациентов с рецидивирующей и рефрактерной лимфомой Ходжкина (р/р ЛХ). Несмотря на это, рецидив и прогрессирование заболевания в посттрансплантационном периоде происходит у значимой части пациентов. Ниволумаб представляет собой препарат моноклональных антител, блокирующих рецептор программируемой гибели 1 (PD-1), который показал высокую эффективность у пациентов с р/р ЛХ перед и после алло-ТГСК. Мы ретроспективно оценили эффективность и токсичность терапии ниволумабом в монорежиме у 7 пациентов с рецидивами ЛХ после алло-ТГСК в различных режимах дозирования (0,5-3 мг/кг) с кратностью введения каждые 2 недели. В нашей группе не было отмечено случаев возникновения РТПХ на фоне лечения ниволумабом. Вне зависимости от режима дозирования, объективный ответ на терапию отмечен у всех пациентов (100%). Полный метаболический ответ наблюдался у двух пациентов (28.6%) с режимом дозирования 0.5 и 1 мг/кг. Во время лечения ниволумабом у 3/7 (42,9%) пациентов наблюдались иммунные нежелательные явления (НЯ) 3-4 степени тяжести. Тяжелые НЯ отмечались у пациентов с различными режимами дозирования (0,5; 1 или 3 мг/кг. Отмечался полный регресс НЯ на фоне терапии люкокортикостероидами. Все пациенты были живы на момент анализа. У 4/7 пациентов отмечался рецидив заболевания через 7 (5-9) месяцев после начала терапии ниволумабом. Таким образом, ниволумаб может быть эффективным терапевтическим подходом у пациентов с рецидивом ЛХ после алло-ТГСК, с риском проявления иммунной токсичности в ряде случаев.

Ключевые слова

Лимфома Ходжкина, аллогенная трансплантация гемопоэтических клеток, рецидив, ингибиторы контрольных точек, ниволумаб, дозировка.

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Introduction

Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is an effective treatment option in a number of high-risk oncohematological patients [1]. Availability of HLA-identical siblings or compatible unrelated donors is a common limiting factor for broader allo-HSCT practice, especially among ethnical minorities [2, 3, 4]. Sufficient growth of allo HSCT worldwide activities occurs because of lowering limitations by the stage of diseases, patients’ age and comorbidities, due to introduction of fludarabin-containing conditioning regimens (RICs), thus reducing intensity of cytostatic load and transplantation-associated mortality while retaining efficiency and of treatment, along with immunoadoptive effects [5, 6, 7]. Meanwhile, nearly all patients have a potential haploidentical family donor. However, early attempts of haplo-HSCT using a native graft without T cell purging using standard immunosuppression shedules resulted into unacceptable graft-versus-host disease (GVHD) rates whereas ex vivo T cell depletion for GVHD control was accomplished by high risk of non-engraftment and infectious complications causing high mortality [8, 9, 10, 11]. In Russia, approximately 80% of patients requiring allo-HSCT do not have a compatible sibling donor, whereas a chance to find an unrelated donor do not exceed 60-70%, requiring high financial costs, thus presenting the main obstacle for timely performance of allo-HSCT [3]. Search for alternative stem cell sources, such as umbilical blood cells, or haploidentical donor is quite challenging. To control HSCT risks and to prevent non-engraftment, the workers form Perugia (Italy) have used megadoses of CD34+ cells after their positive selection (a median of >10×106/ kg weight), with minimal T cell contamination (a median of 1×104/kg weight) combined with intensive conditioning regimen [11]. This study reported engraftment in 94 of 101 patients with good GVHD control. However, the rates of non-relapse-associated mortality proved to be very high (36.5%) which were largely determined by infections associated with slow immunological recovery. Event-free survival was satisfactory in the patients transplanted in remission, being, however, extremely poor for the patients treated in resistant or relapsing cases. Complexity of this transplantation approach and high costs of the method limited its approval by other transplantation centers. A group of Chinese workers has used a method avoiding ex vivo T cell depletion based on intensive pre-transplant treatment using myeloablative GIAC conditioning regimens (MAC) combined with anti-thymocyte gobulin as in vivo T cell depletion. The research team used a combined non-manipulated graft containing stimulated peripheral HCSs and bone marrow HSCs. 250 patients with acute leukemias were reported to achieve full donor chimerism, whereas acute and chronic GVHD frequencies were, respectively, 46% and 54%. Despite satisfactory relapse-free survival rates, the standard-risk patients often suffered with opportunistic infections, Transplant-related mortality rates for standard-risk and high-risk groups were, respectively, 19.5% и 29.5% for acute myeloid leukemia (AML), or 21% and 51% for acute lymphoblastic leukemia (ALL) [13]. Another approach to allo-HSCT was developed in Baltimore (USA) included usage of non-manipulated graft followed by post-transplant cyclophosphamide injection (PtCy) to control T cell reactivity after HSCT seems to overcome most obstacles historically connected with haplo-HSCT [14, 22]. Over last years, the haplo-HSCT methodology has experienced sufficient changes, i.e., novel conditioning protocols were developed with decreased toxicity and low dose intensity; the ex vivo T cell depletion options were designed, i.e., CD34+ cell selection, CD3+/CD19+ cell depletion, γ/β TCR chain depletion. The in vivo trials, suggest favorable effects from usage of anti-thymocyte globulins (ATG), cyclophosphamide at at high doses on D+3, D+4 after the haploidentical transplant. An immune response modification could be carried out as reduction of T cell reactivity by changing the Th1/Th2 balance, by means of hematopoiesis stimulation with G-CSF before myeloexfusion. Pharmacological prophylaxis of acute GVHD (aGVHD) is accomplished by new therapies, e.g., with rapamycin, the mTOR inhibitor [14, 15, 16]. Good efficiency of haploidentical HSCT is shown for the 1st and 2nd remissions of AML, with 5-year relapse-free survival of 82.5%, and 59.4%. Appropriate figures for ALL were 68.9% and 56.6% [15]. The results of relapsed and resistant clinical forms were unsatisfactory if using allo-HSCT, or hapolo-HSC, i.e., the 5-year overall survival in AML was 42.9% and 22.2% in ALL [15, 16, 17, 18]. The aim of our study was to assess efficiency of haplo-HSCT performed with non-manipulated grafts of children and adolescents with high-risk acute leukemias. In this respect an efficiency study of haploidentical GVHD was performed at our clinic in children and adolescents with high-risk ALL and AML, at maximal observation terms of 10 years.

Patients and methods

The study included 106 children and adolescents 0 to 18 years old (median age, 7 y.o.). with primary diagnosis of ALL in 63 cases (59.4%), and AML (43 patients, 41%), who underwent allo-HSCT from haploidentical donors within a time period of December 2006 to December 2016 года. The patients were followed up for a maximum of 10 years.
Haploidentical HSCT was performed in remission state for 43 patients (40.6%), i.e., 21 patients were transplanted in 1st remission, 13 patients, in 2nd remission, and nine children were treated in 3rd remission. Sixty-three relapsed/ therapy-resistant (R/R) patients with AL were transplanted (59.4% of total). Several MAC schedules were applied for conditioning treatment, i.e., GIAC protocol (39 cases, 36.8% of total) including busulfan (16 mg/kg body weight), cyclophosphamide (Cy) at a dose of 2000 mg/m2, cytosar (8000 mg/m2), lomustin (120 mg/kg). Other MACs were based on busulfan (12 mg/kg) and Fludarabin (150 mg/m2), being applied in 2 patients (2%), and a regimen based on Treosulfan (42 g/m2) was used in 6 cases (5.7%). The reduced-intensity conditioning regimens (RICs) based on melphalan (140 mg/m2) were applied in 40 recipients (37.7%), whereas RICs containing busulfan (8 mg/kg) were used in 18 patients (17%).
All the patients underwent aGHVD prophylaxis, i.e., antithymocyte globulin (ATGAM) was injected at 60 mg/kg weight in 39 cases (36.8%); whereas post-transplant cyclophosphamide (PtCy, 50 mg/kg) was injected on D+3 and D+4 in 67 recipients (63.2%). Basic immune suppressive therapy (IST) included Tacrolimus (0.03 mg/kg/d) for 47 patients (44.3%); cyclosporine A (3 mg/kg/d was used in 59 cases (55.7%). In addition to tacrolimus, an mTOR inhibitor at 1 mg/m2 was administered since D+3. Clinical parameters of the patients enrolled into the study, are summarized in Table 1.
Two methods were used for yielding the haploidentical donor grafts, i.e.:
1. A combined graft containing bone marrow and peripheral hematopoietic stem cells (PHSCs) obtained after G-CSF priming (5 mg/kg/d, for 4 days) then followed by positive selection of CD34+ клеток with a CliniMACS device (Miltenyi Biotec). This cell product was applied in 27 cases (25.5%).
2. Non-manipulated marrow graft primed with G-CSF (5 mg/kg/d for 3 days) was obtained and used in 79 patients (74.5%). The median cellularity as for transfused CD34+ cells comprised 5.9х106/kg weight for non-manipulated bone marrow (1.0 to 9х106/kg), and 5.9х106/kg for the combined graft (2.5 to 30.9х106/kg).

20-27_Paina Table 1. Characteristics of the patients subjected to haploidentical HSCT.png

For statistical evaluation, SPSS Statistics v.17 and Statistica 8.0 software was used. The patients in remission are censored for 01.01.2018. Overall survival was compared by means of log-rank test, comparative analysis of differential proportions was performed by the Fisher’s exact test. The difference levels of p<0.05 were considered significant.

Results

Hematopoiesis recovery

Stem cell engraftment after haplo-HSCT was documented in 80 total group of patients (75.7% of total). Median engraftment term was D+24 (D+14 to D+34). Primary non-engraftment was revealed in 26 patients (24.5%) due to chemoresistance and/or relapsed AL. The median recovery terms for granulocytes (>0.5x109/L) was D+19 (D+10 to D+34); for leukocytes (>1.0x109/L), D+17 (D+10 to D+34); for platelets reconstitution (>20x109/L), D+17 (D+10–D+41). Median recovery time for lymphocytes (>30x109/L) was D+29 (D+14 to D+50). Full donor chimerism was registered in 67 cases (83.8%) by day +30 posttransplant. Thirteen patients (16.2%) developed full chimerism by day +60 after HSCT.

Survival data

Ten-year overall survival (OS) in total group proved to be 33.3% after haplo-HSCT (Fig. 1). In particular, the ten-year OS in patients transplanted in 1st and 2nd remissions was 64.7% as compared to 18.1% for the patients transplanted beyond the remission. (р=0.01; Fig. 2). Overall survival for the patients who received G-CSF-primed, non-manipulated bone marrow and in those who got combined marrow/peripheral grafts was, respectively, 38% and 18.5% (р=0.03, Fig. 3). The AL type did not influence the 10-year survival, i.e., 36.5% vs 27.9% respectively, for ALL and AML subgroups. The OS values in ALL versus AML patients transplanted in 1st or 2nd remissions have shown comparable OS rates, respectively, 68.2% and 58.3%. We could not show any significant correlations between the 10-year survival and recovery kinetics of leukocytes, neutrophils and platelets post-transplant.

20-27_Paina Figure 1. Ten-year overall survival in children and adolescents.png

Figure 1. Ten-year overall survival in children and adolescents with acute leukemias after haplo-HSCT

20-27_Paina Figure 2. Ten-year overall survival in children and adolescents after haplo-HSCT performed in 1st and 2nd.png

Figure 2. Ten-year overall survival in children and adolescents after haplo-HSCT performed in 1st and 2nd remission (р=0.01)

20-27_Paina Figure 3. Ten-year overall survival in children and adolescents.png

Figure 3. Ten-year overall survival in children and adolescents after haplo-HSCT for the groups receiving a G-CSF-primed nonmanipulated bone marrow (blue graph), or a combined hematopoietic graft (green graph). The difference is significant at р=0.03

20-27_Paina Table 2. Comparative indexes of the 10-year overall survival and recovery of granulocytes, platelets and lymphocytes.png

Comparative OS values are presented in Table 2. The 10-year OS did not statistically differ between the groups receiving different conditioning regimens. It could be explained by small numbers of cases and inability to tolerate the full-dose conditioning regimens in resistant AL cases. Hence, OS rates among patients who received MAC regimens comprised 36.2% as compared to 30.5% for the RIC group. The OS values upon more detailed evaluation and subgroup division were as follows: MAC, 28.6%; MAC+PtCy treatment, 40%; RIC, 16.7%, and RIC+PtCy, 38.1% (р>0.05).

Posttransplant complications

Acute graft-versus-host disease (GVHD) is a major immunological disorder developing early after allo-HSCT. Of 80 patients who achieved engraftment, aGVHD grade II was observed in 21 cases (26.3%); severe GVHD (grade III to IV) was diagnosed in 15 patients (18.6%). Leukemia relapses were registered in 51 of 106 patients (48.1%), with a mediane of D+91 after haplo-HSCT (D+17 to D+1101). Occurrence of relapses post haplo-HSCT, if performed in 1st or 2nd remission was 23.5%, with a median of D+88 (D+30 to D+301). The disease recurrence was more common in recipients with resistant or relapsing disease (56,9%, with a median development on D+81 post-transplant). The overall transplant-associated mortality was 21.6% in the studied group. Fatal infectious complications in the early post-transplant period were registered in 14 patients (13.2%). Acute GVHD caused death of 7 patients (8.8%), lethal toxic conditions, in 2 cases (1.9%). Meanwhile, the leukemia relapses proved to prevail in post-engraftment lethality among children and adolescents undergoing haplo-HSCT (39 patients, 48.8%). Posttransplant relapses among the patients transplanted in 1st and 2nd remissions resulted into lethal outcome in 6 cases (17.6%). Meanwhile, the AL recurrence with lethal outcome was registered in 33 cases (45.8%) among patients who received haploidentical grafts in resistant or relapsing disease upon engraftment.

Discussion

At the present time, HSCT from haploidentical donors is known to be an effective and safe treatment approach for the high-risk leukemia patients, requiring allo-HSCT for urgent reasons, especially in absence of a compatible donors, either related or unrelated ones. Fast preparation of a donor and HSC isolation, good chances for repeated graft harvest if required, as well as minimal financial costs comprise clear benefits of haplo-HSCT. However, some cautions exist, due to risks of posttransplant complications, such as acute GVHD and severe infections determined by marked immunosuppression and prolonged immune recovery after haplo-HSCT. Moreover, a specific graft-versus-leukemia (GvL) response after haplo-HSCT and persistence of this effect is still in question, being subject to different studies [20]. Application of RIC regimens as a platform for the post-transplant immunonadoptive therapy may provide an additional tool for enhancement of the GvL immune reaction without increasing the transplant-related mortality. Some promising data on the subject are published by a study team at the John Hopkins and Fred Hutchinson Cancer Research Center on the patients with high-risk acute leukemia who underwent reduced-intensity conditioning followed by haplo-HSCT and post-transplant cyclophosphamide injections on D+3 and D+4. According to this study, clinical engraftment was registered in 87% of the cases, with OS values of 41%. Clinically sound aGHVD (grade II-IV) was registered in <27%, with chronic GVHD documented in 15% of the cases. However, frequency of post-transplant relapses remained high (55%), with relatively low transplant-related mortality (18%) [20, 22]. Our own data on haplo-HSCT confirm the high rates of transplant engraftment (80%), while reaching full donor chimerism by day+30 in 84% of the cases. The rest of this group developed full chimerism by day +60 post-HSCT. Overall survival with a maximal observation term of 10 years was 33.3% for the total group. Frequency of clinical aGVHD in our study is also comparable to the previously reported data,i.e., prevalence of aGVHD grade II was 26.3%, aGVHD grade III-IV, 18.6%, which does not exceed the published values [20]. We have obtained encouraging results on the 10-year overall survival (64.7%) for the haplo-HSCT patients who received their graft during 1st and 2nd remissions. Absence of severe lethal infectious complications before D+100 seems to be connected with faster T cell reconstitution. Post-transplant relapses represent the main problem for these patients. High percentage of such dismal outcomes (48.1%) may be explained by the disease status at the time of haplo-HSCT. The majority of patients (72 cases, 68%) were transplanted beyond the registered remission. According to the data published by Italian workers, the relapse rates may reach 50% in such patient groups [7, 12].

Conclusion

Allo-HSCT of the non-manipulated primed bone marrow from a haploidentical donor proved to be an effective approach, in order to achieve clinical remission in children and adolescents with high-risk AL. At the present time, one may discuss relative benefits of different stem cell separation techniques for haplo-HSCT in childhood. Implementation of post-transplant cyclophosphamide (PtCy) proved to be an available and effective regimen improving clinical results of haplo-HSCT. State of the disease is the main factor influencing overall survival after haplo-HSCT. First or second remission of ALL or AML is the optimal time-point for haplo- HSCT. To improve the results of haplo-HSCT in Russia, the appropriate cooperative multicentric studies are required in this research area.

Conflict of interest

The authors report no conflicts of interest.

References

1. Lucchini G, Labopin M, Beohou E, Dalissier A, Dalle JH, Cornish J, Zecca M, Afanasyev B et al. Impact of conditioning regimen on outcomes for children with acute myeloid leukemia undergoing transplantation in first complete remission. An analysis on behalf of the Pediatric Disease Working Party of the European Group for Blood and Marrow Transplantation. Biol Blood Marrow Transplant. 2017; 23(3):467-474.
2. Bashey A, Solomon SR. T-cell replete haploidentical donor transplantation using post-transplant CY: an emerging standard-of-care option for patients who lack an HLA-identical sibling donor. Bone Marrow Transplantation 2014; 49, 999–1008.
3. Alyanskyi AL, Kucher MA, Makarenko OA, Golovacheva AA, Kuzmich EV, Babenko EV, Estrina MA, Paina OV, Pevtcov DE, Zubarovskaya LS, Afanasyev BV. Actual issues of search for unrelated bone marrow donors in Russian Federation. Transfuziologiya. 2016; 3:21-28 (In Russian).
4. Santoro N, Ruggeri A, Labopin M, Bacigalupo A, Ciceri F, Gulbas Z, Huang H, Afanasyev B et al. Unmanipulated haploidentical stem cell transplantation in adults with acute lymphoblastic leukemia: a study on behalf of the Acute Leukemia Working Party of the EBMT. J Hematol Oncol. 2017; 10 (1): 113.
5. Semenova EV, Stancheva NV, Alyanskyi AL, Babenko EV, Vavilov VN, Morosova EV, Bondarenko SN, Sipol AA, Paina OV, Barkhatov IM, Zubarovskaya LS, Afanasyev BV. Alogeneic hematopoietic stem cell transplantation with reduced- intensity conditioning in children and adolescents with prognostically infavorable forms of acute lymphoblastic leukemia. Onkogematologiya. 2011; 4:25-32 (In Russian).
6. Bitan M, He W, Zhang M-J, Abdel-Azim H, Ayas MF, Bielorai B, Carpenter PA et al. Transplantation for children with acute myeloid leukemia: a comparison of outcomes with reduced intensity and myeloablative regimens. Blood 2014; 123(10): 1615-1620.
7. Solomon SR, Sizemore CA, SanacoreM, et al. Haploidentical transplantation using T cell replete peripheral blood stem cells and myeloablative conditioning in patients with high-risk hematological malignancies who lack conventional donors is well tolerated and produces excellent relapse-free survival: results of a prospective phase II trial. Biol Blood Marrow Transplant. 2012;18:1859–1866.
8. Anasetti C, Beatty PG, Storb R, Martin PJ, Mori M, Sanders JE et al. Effect of HLA incompatibility on graft-versus- host disease, relapse, and survival after marrow transplantation for patients with leukemia or lymphoma. Hum Immunol 1990; 29: 79–91.
9. Beatty PG, Clift RA, Mickelson EM, Nisperos BB, Flournoy N, Martin PJ et al. Marrow transplantation from related donors other than HLA-identical siblings. N Engl J Med. 1985; 313:765–771.
10. Powles RL, Morgenstern GR, Kay HE, McElwain TJ, Clink HM, Dady PJ et al. Mismatched family donors for bone-marrow transplantation as treatment for acute leukaemia. Lancet 1983; 1:612–615.
11. Szydlo R, Goldman JM, Klein JP, Gale RP, Ash RC, Bach FH et al. Results of allogeneic bone marrow transplants for leukemia using donors other than HLA-identical siblings. J Clin Oncol. 1997; 15:1767-1777.
12. Aversa F, Terenzi A, Tabilio A, Falzetti F, Carotti A, Ballanti S et al. Full haplotype mismatched hematopoietic stem-cell transplantation: a phase II study in patients with acute leukemia at high risk of relapse. J Clin Oncol. 2005; 23:3447–3454.
13. Huang XJ, Liu DH, Liu KY, Xu LP, Chen H, Han W et al. Treatment of acute leukemia with unmanipulated HLA-mismatched/haploidentical blood and bone marrow transplantation. Biol Blood Marrow Transplant. 2009; 15:257-265.
14. Berenbaum MC, Brown IN. Prolongation of homograft survival in mice with single doses of cyclophosphamide. Nature 1963; 200:84.
15. Kekre N, Antin JH. Hematopoietic stem cell transplantation donor sources in the 21st century: choosing the ideal donor when a perfect match does not exist. Blood 2014; 123 (3):334-343.
16. Moiseev IS, Pirogova OV, Alyanski AL, Babenko EV, Gindina TL, Darskaya EI, Slesarchuk OA, Bondarenko SN, Afanasyev BV. Graft-versus-Host disease prophylaxis in unrelated peripheral blood stem cell transplantation with post-transplantation cyclophosphamide, tacrolimus and mycophenalate mofetil. Biol Blood Marrow Transplant. 2016; 22(6):1037-1042.
17. Maschan MA. Alpha/beta- T lymphocyte depletion: a reliable platform for development of hematopoietic stem cell transplants from haploidentical donors. Russian Journal of Pediatric Hematology and Oncology. 2015; 2(3): 34-38 (In Russian).
18. Zecca M, Strocchio L, Pagliara D, Comoli P, Bertaina A, Giorgiani G, Perotti C, Corbella F, Brescia L, Locatelli F. HLA-haploidentical T-cell-depleted allogeneic hematopoietic stem cell transplantation in children with Fanconi anemia. Biol Blood Marrow Transplant. 2014; 20(4):571-576.
19. Wang Z, Zheng X, Yan H, Li D, Wang H. Good outcome of haploidentical hematopoietic SCT as a salvage therapy in children and adolescents with acquired severe aplastic anemia. Bone Marrow Transplantation 2014; 49:1481-1485.
20. Xiao-jun Huang. Current status of haploidentical stem cell transplantation for leukemia. Journal Hematol Oncol. 2008; 1:27.
21. Wang Y, Chang Y-J, Xu L-P, Liu K-Y, Liu D-H, Zhang X-H, Chen H et al. Who is the best donor for a related HLA haplotype-mismatched transplant? Blood 2014; 124:843-850.
22. Luznik L, O’Donnell PV, Symons HJ, Chen AR, Leffell MS, Zahurak M et al. HLA-haploidentical bone marrow transplantation for hematologic malignancies using nonmyeloablative conditioning and high-dose, post transplantation cyclophosphamide. Biol Blood Marrow Transplant 2008; 14:641–650.

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Introduction

Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is an effective treatment option in a number of high-risk oncohematological patients [1]. Availability of HLA-identical siblings or compatible unrelated donors is a common limiting factor for broader allo-HSCT practice, especially among ethnical minorities [2, 3, 4]. Sufficient growth of allo HSCT worldwide activities occurs because of lowering limitations by the stage of diseases, patients’ age and comorbidities, due to introduction of fludarabin-containing conditioning regimens (RICs), thus reducing intensity of cytostatic load and transplantation-associated mortality while retaining efficiency and of treatment, along with immunoadoptive effects [5, 6, 7]. Meanwhile, nearly all patients have a potential haploidentical family donor. However, early attempts of haplo-HSCT using a native graft without T cell purging using standard immunosuppression shedules resulted into unacceptable graft-versus-host disease (GVHD) rates whereas ex vivo T cell depletion for GVHD control was accomplished by high risk of non-engraftment and infectious complications causing high mortality [8, 9, 10, 11]. In Russia, approximately 80% of patients requiring allo-HSCT do not have a compatible sibling donor, whereas a chance to find an unrelated donor do not exceed 60-70%, requiring high financial costs, thus presenting the main obstacle for timely performance of allo-HSCT [3]. Search for alternative stem cell sources, such as umbilical blood cells, or haploidentical donor is quite challenging. To control HSCT risks and to prevent non-engraftment, the workers form Perugia (Italy) have used megadoses of CD34+ cells after their positive selection (a median of >10×106/ kg weight), with minimal T cell contamination (a median of 1×104/kg weight) combined with intensive conditioning regimen [11]. This study reported engraftment in 94 of 101 patients with good GVHD control. However, the rates of non-relapse-associated mortality proved to be very high (36.5%) which were largely determined by infections associated with slow immunological recovery. Event-free survival was satisfactory in the patients transplanted in remission, being, however, extremely poor for the patients treated in resistant or relapsing cases. Complexity of this transplantation approach and high costs of the method limited its approval by other transplantation centers. A group of Chinese workers has used a method avoiding ex vivo T cell depletion based on intensive pre-transplant treatment using myeloablative GIAC conditioning regimens (MAC) combined with anti-thymocyte gobulin as in vivo T cell depletion. The research team used a combined non-manipulated graft containing stimulated peripheral HCSs and bone marrow HSCs. 250 patients with acute leukemias were reported to achieve full donor chimerism, whereas acute and chronic GVHD frequencies were, respectively, 46% and 54%. Despite satisfactory relapse-free survival rates, the standard-risk patients often suffered with opportunistic infections, Transplant-related mortality rates for standard-risk and high-risk groups were, respectively, 19.5% и 29.5% for acute myeloid leukemia (AML), or 21% and 51% for acute lymphoblastic leukemia (ALL) [13]. Another approach to allo-HSCT was developed in Baltimore (USA) included usage of non-manipulated graft followed by post-transplant cyclophosphamide injection (PtCy) to control T cell reactivity after HSCT seems to overcome most obstacles historically connected with haplo-HSCT [14, 22]. Over last years, the haplo-HSCT methodology has experienced sufficient changes, i.e., novel conditioning protocols were developed with decreased toxicity and low dose intensity; the ex vivo T cell depletion options were designed, i.e., CD34+ cell selection, CD3+/CD19+ cell depletion, γ/β TCR chain depletion. The in vivo trials, suggest favorable effects from usage of anti-thymocyte globulins (ATG), cyclophosphamide at at high doses on D+3, D+4 after the haploidentical transplant. An immune response modification could be carried out as reduction of T cell reactivity by changing the Th1/Th2 balance, by means of hematopoiesis stimulation with G-CSF before myeloexfusion. Pharmacological prophylaxis of acute GVHD (aGVHD) is accomplished by new therapies, e.g., with rapamycin, the mTOR inhibitor [14, 15, 16]. Good efficiency of haploidentical HSCT is shown for the 1st and 2nd remissions of AML, with 5-year relapse-free survival of 82.5%, and 59.4%. Appropriate figures for ALL were 68.9% and 56.6% [15]. The results of relapsed and resistant clinical forms were unsatisfactory if using allo-HSCT, or hapolo-HSC, i.e., the 5-year overall survival in AML was 42.9% and 22.2% in ALL [15, 16, 17, 18]. The aim of our study was to assess efficiency of haplo-HSCT performed with non-manipulated grafts of children and adolescents with high-risk acute leukemias. In this respect an efficiency study of haploidentical GVHD was performed at our clinic in children and adolescents with high-risk ALL and AML, at maximal observation terms of 10 years.

Patients and methods

The study included 106 children and adolescents 0 to 18 years old (median age, 7 y.o.). with primary diagnosis of ALL in 63 cases (59.4%), and AML (43 patients, 41%), who underwent allo-HSCT from haploidentical donors within a time period of December 2006 to December 2016 года. The patients were followed up for a maximum of 10 years.
Haploidentical HSCT was performed in remission state for 43 patients (40.6%), i.e., 21 patients were transplanted in 1st remission, 13 patients, in 2nd remission, and nine children were treated in 3rd remission. Sixty-three relapsed/ therapy-resistant (R/R) patients with AL were transplanted (59.4% of total). Several MAC schedules were applied for conditioning treatment, i.e., GIAC protocol (39 cases, 36.8% of total) including busulfan (16 mg/kg body weight), cyclophosphamide (Cy) at a dose of 2000 mg/m2, cytosar (8000 mg/m2), lomustin (120 mg/kg). Other MACs were based on busulfan (12 mg/kg) and Fludarabin (150 mg/m2), being applied in 2 patients (2%), and a regimen based on Treosulfan (42 g/m2) was used in 6 cases (5.7%). The reduced-intensity conditioning regimens (RICs) based on melphalan (140 mg/m2) were applied in 40 recipients (37.7%), whereas RICs containing busulfan (8 mg/kg) were used in 18 patients (17%).
All the patients underwent aGHVD prophylaxis, i.e., antithymocyte globulin (ATGAM) was injected at 60 mg/kg weight in 39 cases (36.8%); whereas post-transplant cyclophosphamide (PtCy, 50 mg/kg) was injected on D+3 and D+4 in 67 recipients (63.2%). Basic immune suppressive therapy (IST) included Tacrolimus (0.03 mg/kg/d) for 47 patients (44.3%); cyclosporine A (3 mg/kg/d was used in 59 cases (55.7%). In addition to tacrolimus, an mTOR inhibitor at 1 mg/m2 was administered since D+3. Clinical parameters of the patients enrolled into the study, are summarized in Table 1.
Two methods were used for yielding the haploidentical donor grafts, i.e.:
1. A combined graft containing bone marrow and peripheral hematopoietic stem cells (PHSCs) obtained after G-CSF priming (5 mg/kg/d, for 4 days) then followed by positive selection of CD34+ клеток with a CliniMACS device (Miltenyi Biotec). This cell product was applied in 27 cases (25.5%).
2. Non-manipulated marrow graft primed with G-CSF (5 mg/kg/d for 3 days) was obtained and used in 79 patients (74.5%). The median cellularity as for transfused CD34+ cells comprised 5.9х106/kg weight for non-manipulated bone marrow (1.0 to 9х106/kg), and 5.9х106/kg for the combined graft (2.5 to 30.9х106/kg).

20-27_Paina Table 1. Characteristics of the patients subjected to haploidentical HSCT.png

For statistical evaluation, SPSS Statistics v.17 and Statistica 8.0 software was used. The patients in remission are censored for 01.01.2018. Overall survival was compared by means of log-rank test, comparative analysis of differential proportions was performed by the Fisher’s exact test. The difference levels of p<0.05 were considered significant.

Results

Hematopoiesis recovery

Stem cell engraftment after haplo-HSCT was documented in 80 total group of patients (75.7% of total). Median engraftment term was D+24 (D+14 to D+34). Primary non-engraftment was revealed in 26 patients (24.5%) due to chemoresistance and/or relapsed AL. The median recovery terms for granulocytes (>0.5x109/L) was D+19 (D+10 to D+34); for leukocytes (>1.0x109/L), D+17 (D+10 to D+34); for platelets reconstitution (>20x109/L), D+17 (D+10–D+41). Median recovery time for lymphocytes (>30x109/L) was D+29 (D+14 to D+50). Full donor chimerism was registered in 67 cases (83.8%) by day +30 posttransplant. Thirteen patients (16.2%) developed full chimerism by day +60 after HSCT.

Survival data

Ten-year overall survival (OS) in total group proved to be 33.3% after haplo-HSCT (Fig. 1). In particular, the ten-year OS in patients transplanted in 1st and 2nd remissions was 64.7% as compared to 18.1% for the patients transplanted beyond the remission. (р=0.01; Fig. 2). Overall survival for the patients who received G-CSF-primed, non-manipulated bone marrow and in those who got combined marrow/peripheral grafts was, respectively, 38% and 18.5% (р=0.03, Fig. 3). The AL type did not influence the 10-year survival, i.e., 36.5% vs 27.9% respectively, for ALL and AML subgroups. The OS values in ALL versus AML patients transplanted in 1st or 2nd remissions have shown comparable OS rates, respectively, 68.2% and 58.3%. We could not show any significant correlations between the 10-year survival and recovery kinetics of leukocytes, neutrophils and platelets post-transplant.

20-27_Paina Figure 1. Ten-year overall survival in children and adolescents.png

Figure 1. Ten-year overall survival in children and adolescents with acute leukemias after haplo-HSCT

20-27_Paina Figure 2. Ten-year overall survival in children and adolescents after haplo-HSCT performed in 1st and 2nd.png

Figure 2. Ten-year overall survival in children and adolescents after haplo-HSCT performed in 1st and 2nd remission (р=0.01)

20-27_Paina Figure 3. Ten-year overall survival in children and adolescents.png

Figure 3. Ten-year overall survival in children and adolescents after haplo-HSCT for the groups receiving a G-CSF-primed nonmanipulated bone marrow (blue graph), or a combined hematopoietic graft (green graph). The difference is significant at р=0.03

20-27_Paina Table 2. Comparative indexes of the 10-year overall survival and recovery of granulocytes, platelets and lymphocytes.png

Comparative OS values are presented in Table 2. The 10-year OS did not statistically differ between the groups receiving different conditioning regimens. It could be explained by small numbers of cases and inability to tolerate the full-dose conditioning regimens in resistant AL cases. Hence, OS rates among patients who received MAC regimens comprised 36.2% as compared to 30.5% for the RIC group. The OS values upon more detailed evaluation and subgroup division were as follows: MAC, 28.6%; MAC+PtCy treatment, 40%; RIC, 16.7%, and RIC+PtCy, 38.1% (р>0.05).

Posttransplant complications

Acute graft-versus-host disease (GVHD) is a major immunological disorder developing early after allo-HSCT. Of 80 patients who achieved engraftment, aGVHD grade II was observed in 21 cases (26.3%); severe GVHD (grade III to IV) was diagnosed in 15 patients (18.6%). Leukemia relapses were registered in 51 of 106 patients (48.1%), with a mediane of D+91 after haplo-HSCT (D+17 to D+1101). Occurrence of relapses post haplo-HSCT, if performed in 1st or 2nd remission was 23.5%, with a median of D+88 (D+30 to D+301). The disease recurrence was more common in recipients with resistant or relapsing disease (56,9%, with a median development on D+81 post-transplant). The overall transplant-associated mortality was 21.6% in the studied group. Fatal infectious complications in the early post-transplant period were registered in 14 patients (13.2%). Acute GVHD caused death of 7 patients (8.8%), lethal toxic conditions, in 2 cases (1.9%). Meanwhile, the leukemia relapses proved to prevail in post-engraftment lethality among children and adolescents undergoing haplo-HSCT (39 patients, 48.8%). Posttransplant relapses among the patients transplanted in 1st and 2nd remissions resulted into lethal outcome in 6 cases (17.6%). Meanwhile, the AL recurrence with lethal outcome was registered in 33 cases (45.8%) among patients who received haploidentical grafts in resistant or relapsing disease upon engraftment.

Discussion

At the present time, HSCT from haploidentical donors is known to be an effective and safe treatment approach for the high-risk leukemia patients, requiring allo-HSCT for urgent reasons, especially in absence of a compatible donors, either related or unrelated ones. Fast preparation of a donor and HSC isolation, good chances for repeated graft harvest if required, as well as minimal financial costs comprise clear benefits of haplo-HSCT. However, some cautions exist, due to risks of posttransplant complications, such as acute GVHD and severe infections determined by marked immunosuppression and prolonged immune recovery after haplo-HSCT. Moreover, a specific graft-versus-leukemia (GvL) response after haplo-HSCT and persistence of this effect is still in question, being subject to different studies [20]. Application of RIC regimens as a platform for the post-transplant immunonadoptive therapy may provide an additional tool for enhancement of the GvL immune reaction without increasing the transplant-related mortality. Some promising data on the subject are published by a study team at the John Hopkins and Fred Hutchinson Cancer Research Center on the patients with high-risk acute leukemia who underwent reduced-intensity conditioning followed by haplo-HSCT and post-transplant cyclophosphamide injections on D+3 and D+4. According to this study, clinical engraftment was registered in 87% of the cases, with OS values of 41%. Clinically sound aGHVD (grade II-IV) was registered in <27%, with chronic GVHD documented in 15% of the cases. However, frequency of post-transplant relapses remained high (55%), with relatively low transplant-related mortality (18%) [20, 22]. Our own data on haplo-HSCT confirm the high rates of transplant engraftment (80%), while reaching full donor chimerism by day+30 in 84% of the cases. The rest of this group developed full chimerism by day +60 post-HSCT. Overall survival with a maximal observation term of 10 years was 33.3% for the total group. Frequency of clinical aGVHD in our study is also comparable to the previously reported data,i.e., prevalence of aGVHD grade II was 26.3%, aGVHD grade III-IV, 18.6%, which does not exceed the published values [20]. We have obtained encouraging results on the 10-year overall survival (64.7%) for the haplo-HSCT patients who received their graft during 1st and 2nd remissions. Absence of severe lethal infectious complications before D+100 seems to be connected with faster T cell reconstitution. Post-transplant relapses represent the main problem for these patients. High percentage of such dismal outcomes (48.1%) may be explained by the disease status at the time of haplo-HSCT. The majority of patients (72 cases, 68%) were transplanted beyond the registered remission. According to the data published by Italian workers, the relapse rates may reach 50% in such patient groups [7, 12].

Conclusion

Allo-HSCT of the non-manipulated primed bone marrow from a haploidentical donor proved to be an effective approach, in order to achieve clinical remission in children and adolescents with high-risk AL. At the present time, one may discuss relative benefits of different stem cell separation techniques for haplo-HSCT in childhood. Implementation of post-transplant cyclophosphamide (PtCy) proved to be an available and effective regimen improving clinical results of haplo-HSCT. State of the disease is the main factor influencing overall survival after haplo-HSCT. First or second remission of ALL or AML is the optimal time-point for haplo- HSCT. To improve the results of haplo-HSCT in Russia, the appropriate cooperative multicentric studies are required in this research area.

Conflict of interest

The authors report no conflicts of interest.

References

1. Lucchini G, Labopin M, Beohou E, Dalissier A, Dalle JH, Cornish J, Zecca M, Afanasyev B et al. Impact of conditioning regimen on outcomes for children with acute myeloid leukemia undergoing transplantation in first complete remission. An analysis on behalf of the Pediatric Disease Working Party of the European Group for Blood and Marrow Transplantation. Biol Blood Marrow Transplant. 2017; 23(3):467-474.
2. Bashey A, Solomon SR. T-cell replete haploidentical donor transplantation using post-transplant CY: an emerging standard-of-care option for patients who lack an HLA-identical sibling donor. Bone Marrow Transplantation 2014; 49, 999–1008.
3. Alyanskyi AL, Kucher MA, Makarenko OA, Golovacheva AA, Kuzmich EV, Babenko EV, Estrina MA, Paina OV, Pevtcov DE, Zubarovskaya LS, Afanasyev BV. Actual issues of search for unrelated bone marrow donors in Russian Federation. Transfuziologiya. 2016; 3:21-28 (In Russian).
4. Santoro N, Ruggeri A, Labopin M, Bacigalupo A, Ciceri F, Gulbas Z, Huang H, Afanasyev B et al. Unmanipulated haploidentical stem cell transplantation in adults with acute lymphoblastic leukemia: a study on behalf of the Acute Leukemia Working Party of the EBMT. J Hematol Oncol. 2017; 10 (1): 113.
5. Semenova EV, Stancheva NV, Alyanskyi AL, Babenko EV, Vavilov VN, Morosova EV, Bondarenko SN, Sipol AA, Paina OV, Barkhatov IM, Zubarovskaya LS, Afanasyev BV. Alogeneic hematopoietic stem cell transplantation with reduced- intensity conditioning in children and adolescents with prognostically infavorable forms of acute lymphoblastic leukemia. Onkogematologiya. 2011; 4:25-32 (In Russian).
6. Bitan M, He W, Zhang M-J, Abdel-Azim H, Ayas MF, Bielorai B, Carpenter PA et al. Transplantation for children with acute myeloid leukemia: a comparison of outcomes with reduced intensity and myeloablative regimens. Blood 2014; 123(10): 1615-1620.
7. Solomon SR, Sizemore CA, SanacoreM, et al. Haploidentical transplantation using T cell replete peripheral blood stem cells and myeloablative conditioning in patients with high-risk hematological malignancies who lack conventional donors is well tolerated and produces excellent relapse-free survival: results of a prospective phase II trial. Biol Blood Marrow Transplant. 2012;18:1859–1866.
8. Anasetti C, Beatty PG, Storb R, Martin PJ, Mori M, Sanders JE et al. Effect of HLA incompatibility on graft-versus- host disease, relapse, and survival after marrow transplantation for patients with leukemia or lymphoma. Hum Immunol 1990; 29: 79–91.
9. Beatty PG, Clift RA, Mickelson EM, Nisperos BB, Flournoy N, Martin PJ et al. Marrow transplantation from related donors other than HLA-identical siblings. N Engl J Med. 1985; 313:765–771.
10. Powles RL, Morgenstern GR, Kay HE, McElwain TJ, Clink HM, Dady PJ et al. Mismatched family donors for bone-marrow transplantation as treatment for acute leukaemia. Lancet 1983; 1:612–615.
11. Szydlo R, Goldman JM, Klein JP, Gale RP, Ash RC, Bach FH et al. Results of allogeneic bone marrow transplants for leukemia using donors other than HLA-identical siblings. J Clin Oncol. 1997; 15:1767-1777.
12. Aversa F, Terenzi A, Tabilio A, Falzetti F, Carotti A, Ballanti S et al. Full haplotype mismatched hematopoietic stem-cell transplantation: a phase II study in patients with acute leukemia at high risk of relapse. J Clin Oncol. 2005; 23:3447–3454.
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За десятилетний период в НИИ ДОГиТ им. Р. М. Горбачевой выполнено более 150 аллогенных трансплантаций от гаплоидентичного донора, превалирующая часть, как терапия «спасения» больным в первично-резистентном течении ОЛ и/или резистентном течением рецидива ОЛ. </p> <h3 style="text-align: justify;">Цель</h3> <p style="text-align: justify;"> Оценить эффективность гапло-ТГСК у больных с ОЛ высокой группы риска, выполненной в 1 и 2 ремиссии. </p> <h3 style="text-align: justify;">Материалы и методы</h3> <p style="text-align: justify;"> 106 больных с ОЛ высокой группы риска, медиана возраста 7 лет (от 0 до 18 лет), ОЛЛ – 63 (59,4%), ОМЛ – 43 (40,6%), получивших гапло-ТГСК с декабря 2006 года по декабрь 2016 года. В ремиссии заболевания гапло-ТГСК выполнена у 43 больных (40,6%): в 1й ремиссии – 21 (49%), во 2й – 13 больных (30%), в 3й – 9 (21%). В резистентном течении болезни или рецидиве ОЛ – 63 (59,4%) пациента. МАК «GIAC» 39 человек (36,8%), МАК на основе Бусульфана 12мг/кг и Флюдарабина 150мг/м(2) – 2 (2%), МАК со сниженной токсичностью на основе Треосульфана 42 г/м2 – 6 (5,7%), РИК на основе Мелфалана 140мг/м(2) у 40 (37,7%), РИК с использованием Бусульфана 8мг/кг – 18 (17%). Все больные получили профилактику острой реакции «трансплантата против хозяина» (оРТПХ). Серопрофилактика АТГАМ 60мг/кг – 39 (36,8%), ПТЦф 50мг/кг Д+3, Д+4 – 67 (63,2%). Базовая ИСТ: такролимус 47 (44,3%), циклоспорин А в 59 (55,7%) случаях. Источник трансплантата ГСК праймированный КМ и ПСКК, в комбинации – 27 (25,5%) и гапло-КМ – 79 (74,5%). Клеточность трансплантата КМ по CD34+x106/кг от 1 до 9х10<sup>6</sup>/кг (медиана 5,9х10<sup>6</sup>/кг), клеточность КМ+ПСКК от 2,5 до 30,9х10<sup>6</sup>/ кг (медиана 5,9х10<sup>6</sup>/кг). Статистический анализ: SPSS Statistics v.17. Выживаемость и кумулятивная веро ятность анализированы по методу Каплана-Майера. Пациенты, живущие в ремиссии на момент анализа данных, цензурированы 01.01.2018 года. Сравнение ОВ выполнялось при помощи log-rang теста, сравнительный анализ разности долей – точного теста Fisher. Статистически значимыми считались различия при p&lt;0,05. </p> <h3 style="text-align: justify;">Результаты</h3> <p style="text-align: justify;"> Приживление трансплантата после гало-ТГСК зафиксировано у 80 (75,7%) реципиентов. Медиана приживления составила Д+24 (Д+14 – Д+34). Первичное неприживление трансплантата зафиксировано у 26 (24,5%) пациентов по причине химиорезистентности и резистентного течения рецидива ОЛ. Медианы восстановления: гранулоциты (&gt;0,5x10<sup>6</sup>/л) Д+21 (Д+10 – Д+47), лейкоциты (&gt;1,0 x109/л) Д+20 (Д+10 – Д+47), тромбоциты (&gt;20x10<sup>6</sup>/л) Д+20 (Д+10 – Д+72), лимфоциты (&gt;30x10<sup>6</sup>/л) Д+17 (Д+12 – Д+73). Полный донорский химеризм к 30-му дню определялся у 67 (83,8%) пациентов, к 60 дню – у 13 (16,2%). 10-летняя ОВ после гапло – ТГСК – 33,3%. Выживаемость в 1 и 2 ремиссиях составила 64,7% против 18,1% в группе трансплантированных вне ремиссии (р=0,01). Тип ОЛ не повлиял на ОВ 36,5% против 27,9% ОЛЛ и ОМЛ соответственно. Частота развития рецидивов после гапло-ТГСК, выполненной в 1 и 2 ремиссии составила 23,5%, с медианой наступления Д+88 (Д+30 – Д+301). Частота развития оРТПХ II0 – 21 (26,3%) человек, оРТПХ III0-IV0 – 15 (18,6%) человек. </p> <h3 style="text-align: justify;">Выводы</h3> <p style="text-align: justify;"> Гапло-ТГСК в 1 и 2 ремиссиях ОЛ, позволяет достигнуть 10-летней ОВ у 64,7% детей, при этом тип острого лейкоза не влияет на исход гапло-ТГСК. Приемлемая частота развития оРТПХ III0-IV0 – 18,6% позволяет рассматривать гапло-ТГСК, как терапию в 1 и 2 ремиссиях ОЛ высокой группы риска. Основным осложнением гапло-ТГСК является рецидив – 23,5% в ранний посттрансплантационный период до Д+100. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Аллогенная трансплантация гемопоэтических клеток, гаплоидентичная, дети, общая выживаемость, рецидивирование, реакция «трансплантат против хозяина». </p>" ["ELEMENT_PREVIEW_PICTURE_FILE_TITLE"]=> string(398) "Десятилетний опыт применения аллогенной трансплантации гемопоэтических стволовых клеток от гаплоидентичного донора неманипулированного трансплантата у детей и подростков с острыми лейкозами высокой группы риска" ["ELEMENT_DETAIL_PICTURE_FILE_ALT"]=> string(398) "Десятилетний опыт применения аллогенной трансплантации гемопоэтических стволовых клеток от гаплоидентичного донора неманипулированного трансплантата у детей и подростков с острыми лейкозами высокой группы риска" ["ELEMENT_DETAIL_PICTURE_FILE_TITLE"]=> string(398) "Десятилетний опыт применения аллогенной трансплантации 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Р. М. Горбачевой; Первый Санкт-Петербургский государственный медицинский университет им. академика И. П. Павлова Министерства здравоохранения России; Санкт-Петербургский государственный электротехнический университет «ЛЭТИ», Санкт-Петербург, Россия" ["TYPE"]=> string(4) "TEXT" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(571) "НИИ детской онкологии, гематологии и трансплантологии им. Р. М. Горбачевой; Первый Санкт-Петербургский государственный медицинский университет им. академика И. П. Павлова Министерства здравоохранения России; Санкт-Петербургский государственный электротехнический университет «ЛЭТИ», Санкт-Петербург, Россия" ["TYPE"]=> string(4) "TEXT" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(22) "Организации" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_RU"]=> array(36) { ["ID"]=> string(2) "27" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(29) "Описание/Резюме" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "27" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20189" ["VALUE"]=> array(2) { ["TEXT"]=> string(7222) "<p style="text-align: justify;"> Гаплоидентичная трансплантация (гапло-ТГСК) эффективный метод лечения пациентов с острыми лейкозами высокой группы риска (ОЛ), не имеющих полностью совместимого по генам HLA-системы родственного донора и неродственного донора в Международном регистре. За десятилетний период в НИИ ДОГиТ им. Р. М. Горбачевой выполнено более 150 аллогенных трансплантаций от гаплоидентичного донора, превалирующая часть, как терапия «спасения» больным в первично-резистентном течении ОЛ и/или резистентном течением рецидива ОЛ. </p> <h3 style="text-align: justify;">Цель</h3> <p style="text-align: justify;"> Оценить эффективность гапло-ТГСК у больных с ОЛ высокой группы риска, выполненной в 1 и 2 ремиссии. </p> <h3 style="text-align: justify;">Материалы и методы</h3> <p style="text-align: justify;"> 106 больных с ОЛ высокой группы риска, медиана возраста 7 лет (от 0 до 18 лет), ОЛЛ – 63 (59,4%), ОМЛ – 43 (40,6%), получивших гапло-ТГСК с декабря 2006 года по декабрь 2016 года. В ремиссии заболевания гапло-ТГСК выполнена у 43 больных (40,6%): в 1й ремиссии – 21 (49%), во 2й – 13 больных (30%), в 3й – 9 (21%). В резистентном течении болезни или рецидиве ОЛ – 63 (59,4%) пациента. МАК «GIAC» 39 человек (36,8%), МАК на основе Бусульфана 12мг/кг и Флюдарабина 150мг/м(2) – 2 (2%), МАК со сниженной токсичностью на основе Треосульфана 42 г/м2 – 6 (5,7%), РИК на основе Мелфалана 140мг/м(2) у 40 (37,7%), РИК с использованием Бусульфана 8мг/кг – 18 (17%). Все больные получили профилактику острой реакции «трансплантата против хозяина» (оРТПХ). Серопрофилактика АТГАМ 60мг/кг – 39 (36,8%), ПТЦф 50мг/кг Д+3, Д+4 – 67 (63,2%). Базовая ИСТ: такролимус 47 (44,3%), циклоспорин А в 59 (55,7%) случаях. Источник трансплантата ГСК праймированный КМ и ПСКК, в комбинации – 27 (25,5%) и гапло-КМ – 79 (74,5%). Клеточность трансплантата КМ по CD34+x106/кг от 1 до 9х10<sup>6</sup>/кг (медиана 5,9х10<sup>6</sup>/кг), клеточность КМ+ПСКК от 2,5 до 30,9х10<sup>6</sup>/ кг (медиана 5,9х10<sup>6</sup>/кг). Статистический анализ: SPSS Statistics v.17. Выживаемость и кумулятивная веро ятность анализированы по методу Каплана-Майера. Пациенты, живущие в ремиссии на момент анализа данных, цензурированы 01.01.2018 года. Сравнение ОВ выполнялось при помощи log-rang теста, сравнительный анализ разности долей – точного теста Fisher. Статистически значимыми считались различия при p&lt;0,05. </p> <h3 style="text-align: justify;">Результаты</h3> <p style="text-align: justify;"> Приживление трансплантата после гало-ТГСК зафиксировано у 80 (75,7%) реципиентов. Медиана приживления составила Д+24 (Д+14 – Д+34). Первичное неприживление трансплантата зафиксировано у 26 (24,5%) пациентов по причине химиорезистентности и резистентного течения рецидива ОЛ. Медианы восстановления: гранулоциты (&gt;0,5x10<sup>6</sup>/л) Д+21 (Д+10 – Д+47), лейкоциты (&gt;1,0 x109/л) Д+20 (Д+10 – Д+47), тромбоциты (&gt;20x10<sup>6</sup>/л) Д+20 (Д+10 – Д+72), лимфоциты (&gt;30x10<sup>6</sup>/л) Д+17 (Д+12 – Д+73). Полный донорский химеризм к 30-му дню определялся у 67 (83,8%) пациентов, к 60 дню – у 13 (16,2%). 10-летняя ОВ после гапло – ТГСК – 33,3%. Выживаемость в 1 и 2 ремиссиях составила 64,7% против 18,1% в группе трансплантированных вне ремиссии (р=0,01). Тип ОЛ не повлиял на ОВ 36,5% против 27,9% ОЛЛ и ОМЛ соответственно. Частота развития рецидивов после гапло-ТГСК, выполненной в 1 и 2 ремиссии составила 23,5%, с медианой наступления Д+88 (Д+30 – Д+301). Частота развития оРТПХ II0 – 21 (26,3%) человек, оРТПХ III0-IV0 – 15 (18,6%) человек. </p> <h3 style="text-align: justify;">Выводы</h3> <p style="text-align: justify;"> Гапло-ТГСК в 1 и 2 ремиссиях ОЛ, позволяет достигнуть 10-летней ОВ у 64,7% детей, при этом тип острого лейкоза не влияет на исход гапло-ТГСК. Приемлемая частота развития оРТПХ III0-IV0 – 18,6% позволяет рассматривать гапло-ТГСК, как терапию в 1 и 2 ремиссиях ОЛ высокой группы риска. Основным осложнением гапло-ТГСК является рецидив – 23,5% в ранний посттрансплантационный период до Д+100. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Аллогенная трансплантация гемопоэтических клеток, гаплоидентичная, дети, общая выживаемость, рецидивирование, реакция «трансплантат против хозяина». </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(6876) "

Гаплоидентичная трансплантация (гапло-ТГСК) эффективный метод лечения пациентов с острыми лейкозами высокой группы риска (ОЛ), не имеющих полностью совместимого по генам HLA-системы родственного донора и неродственного донора в Международном регистре. За десятилетний период в НИИ ДОГиТ им. Р. М. Горбачевой выполнено более 150 аллогенных трансплантаций от гаплоидентичного донора, превалирующая часть, как терапия «спасения» больным в первично-резистентном течении ОЛ и/или резистентном течением рецидива ОЛ.

Цель

Оценить эффективность гапло-ТГСК у больных с ОЛ высокой группы риска, выполненной в 1 и 2 ремиссии.

Материалы и методы

106 больных с ОЛ высокой группы риска, медиана возраста 7 лет (от 0 до 18 лет), ОЛЛ – 63 (59,4%), ОМЛ – 43 (40,6%), получивших гапло-ТГСК с декабря 2006 года по декабрь 2016 года. В ремиссии заболевания гапло-ТГСК выполнена у 43 больных (40,6%): в 1й ремиссии – 21 (49%), во 2й – 13 больных (30%), в 3й – 9 (21%). В резистентном течении болезни или рецидиве ОЛ – 63 (59,4%) пациента. МАК «GIAC» 39 человек (36,8%), МАК на основе Бусульфана 12мг/кг и Флюдарабина 150мг/м(2) – 2 (2%), МАК со сниженной токсичностью на основе Треосульфана 42 г/м2 – 6 (5,7%), РИК на основе Мелфалана 140мг/м(2) у 40 (37,7%), РИК с использованием Бусульфана 8мг/кг – 18 (17%). Все больные получили профилактику острой реакции «трансплантата против хозяина» (оРТПХ). Серопрофилактика АТГАМ 60мг/кг – 39 (36,8%), ПТЦф 50мг/кг Д+3, Д+4 – 67 (63,2%). Базовая ИСТ: такролимус 47 (44,3%), циклоспорин А в 59 (55,7%) случаях. Источник трансплантата ГСК праймированный КМ и ПСКК, в комбинации – 27 (25,5%) и гапло-КМ – 79 (74,5%). Клеточность трансплантата КМ по CD34+x106/кг от 1 до 9х106/кг (медиана 5,9х106/кг), клеточность КМ+ПСКК от 2,5 до 30,9х106/ кг (медиана 5,9х106/кг). Статистический анализ: SPSS Statistics v.17. Выживаемость и кумулятивная веро ятность анализированы по методу Каплана-Майера. Пациенты, живущие в ремиссии на момент анализа данных, цензурированы 01.01.2018 года. Сравнение ОВ выполнялось при помощи log-rang теста, сравнительный анализ разности долей – точного теста Fisher. Статистически значимыми считались различия при p<0,05.

Результаты

Приживление трансплантата после гало-ТГСК зафиксировано у 80 (75,7%) реципиентов. Медиана приживления составила Д+24 (Д+14 – Д+34). Первичное неприживление трансплантата зафиксировано у 26 (24,5%) пациентов по причине химиорезистентности и резистентного течения рецидива ОЛ. Медианы восстановления: гранулоциты (>0,5x106/л) Д+21 (Д+10 – Д+47), лейкоциты (>1,0 x109/л) Д+20 (Д+10 – Д+47), тромбоциты (>20x106/л) Д+20 (Д+10 – Д+72), лимфоциты (>30x106/л) Д+17 (Д+12 – Д+73). Полный донорский химеризм к 30-му дню определялся у 67 (83,8%) пациентов, к 60 дню – у 13 (16,2%). 10-летняя ОВ после гапло – ТГСК – 33,3%. Выживаемость в 1 и 2 ремиссиях составила 64,7% против 18,1% в группе трансплантированных вне ремиссии (р=0,01). Тип ОЛ не повлиял на ОВ 36,5% против 27,9% ОЛЛ и ОМЛ соответственно. Частота развития рецидивов после гапло-ТГСК, выполненной в 1 и 2 ремиссии составила 23,5%, с медианой наступления Д+88 (Д+30 – Д+301). Частота развития оРТПХ II0 – 21 (26,3%) человек, оРТПХ III0-IV0 – 15 (18,6%) человек.

Выводы

Гапло-ТГСК в 1 и 2 ремиссиях ОЛ, позволяет достигнуть 10-летней ОВ у 64,7% детей, при этом тип острого лейкоза не влияет на исход гапло-ТГСК. Приемлемая частота развития оРТПХ III0-IV0 – 18,6% позволяет рассматривать гапло-ТГСК, как терапию в 1 и 2 ремиссиях ОЛ высокой группы риска. Основным осложнением гапло-ТГСК является рецидив – 23,5% в ранний посттрансплантационный период до Д+100.

Ключевые слова

Аллогенная трансплантация гемопоэтических клеток, гаплоидентичная, дети, общая выживаемость, рецидивирование, реакция «трансплантат против хозяина».

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Paina, Polina V. Kozhokar, Anastasia S. Borovkova, Anastasia S. Frolova, Kirill A. Ekushov, Tatyana A. Bykova, Zhemal Z. Rakhmanova, Mariya A. Galas, Aigul G. Khabirova, Inna V. Markova, Elena V. Semenova, Sergey N. Bondarenko, Elena V. Babenko, Tatyana L. Gindina, Alexander L. Alyanskiy, Ildar M. Barkhatov, Boris I. Smirnov, Ludmila S. Zubarovskaya, Boris V. Afanasyev " ["TYPE"]=> string(4) "TEXT" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(383) "Olesya V. Paina, Polina V. Kozhokar, Anastasia S. Borovkova, Anastasia S. Frolova, Kirill A. Ekushov, Tatyana A. Bykova, Zhemal Z. Rakhmanova, Mariya A. Galas, Aigul G. Khabirova, Inna V. Markova, Elena V. Semenova, Sergey N. Bondarenko, Elena V. Babenko, Tatyana L. Gindina, Alexander L. Alyanskiy, Ildar M. Barkhatov, Boris I. Smirnov, Ludmila S. Zubarovskaya, Boris V. 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During 10 years in R/G/Memorial Institute of children oncology,<br> hematology and transplantation more than 150 patients have Haplo-HSCT. More than 50% of patients were «salvage group» patients. </p> <h3 style="text-align: justify;">Materials and methods</h3> <p style="text-align: justify;"> 106 patients with high-risk AL, median age 7 y.o. (range 0-18), acute lymphoblastic leukemia (ALL) – 63 (59.4%), acute myeloid leukemia (AML) – 43 (40.6%), received Haplo-HSCT from December 2006 till December 2016. Forty three patients (40.6%) recived Haplo-HSCT in complete remission (CR): CR1 21 patients (49%), CR2 – 13 patients (30%), CR3 – 9 patients (21%). Resistance disease or resistance relapse AL – 63 (59.4%) patients. Сonditioning regimens were as follows: MAC «GIAC» 39 patients (36.8%), MAC based on Busulfan 12mg/b.w. and Fludarabine 150 mg/mg(2) – 2 (2%), MAC reduced toxisity based on Treosulfan 42 g/m(2) – 6 (5.7%), RIC based on Melfalan 140 mg/m(2) – 40 (37.7%), RIC with Busulfan 8 mg/b.w. – 18 (17%). All patients received prophylaxis of acute graft versus host disease (aGVHD). Seroprophylaxis with ATG – ATGAM 60mg/b.w. – 39 (36.8%), posttransplant cyclophosphomide 50 mg/b.w. on D+3, D+4 – 67 (63.2%). Conventional immunosuppressive therapy: tacrolimus 47 patients (44.3%), CsA 59 patients (55.7%). Source of transplant – combined unmanipulated stimulated Haplo-bone marrow plus manipulated (positive selected CD34+) stimulated CD34+ cells – 27 patients (25.5%) and unmanipulated stimulated Haplo- bone marrow – 79 (74.5%). Stem cells dose of unmanipulated stimulated Haplo-bone marrow transplant CD34+x106/b.w. median 5.9x10(6)/b.w., stem cells dose of combined transplant median 5.9x10(6)/b.w. (range from 2.5 till 30.9х10(6)/b.w. </p> <h3 style="text-align: justify;">Statistical analysis</h3> <p style="text-align: justify;"> SPSS Statistics v.17. Overal survival (OS) was defined as time from study enrollment to death, with living patients censored on the date of the last follow-up. The Kaplan–Meier method was used to estimate OS rates, and the exact log-rank test was used to compare survival curves. Survival estimates are reported with standard errors determined by the method of Peto and Pike. </p> <h3 style="text-align: justify;">Conclusion</h3> <p style="text-align: justify;"> Haplo-HSCT in 1 and 2 remissions of AL allows to achieve 10-year OS in 64.7% of children, while the type of acute leukemia does not influence the outcome of haplo-HSCT. The acceptable frequency of development of aGVHD III0-IV0 – 18.6% allows to treat haplo-HSCT as therapy in 1 and 2 remissions of high risk group. The main complication of haplo-HSCT is relapse – 23.5% in the early posttransplant period to D + 100. </p> <h3 style="text-align: justify;">Keywords</h3> <p style="text-align: justify;"> Allogeneic hematopoietic stem cell transplantation, haploidentical, children, overall survival, relapse, graftversus- host disease. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(3258) "

Haploidentical transplantation (Haplo-HSCT) is an effective method for treating patients with high-risk acute leukemias (AL) who do not have HLA-matched related (MRD) and matched unrelated donors (MUD). During 10 years in R/G/Memorial Institute of children oncology,
hematology and transplantation more than 150 patients have Haplo-HSCT. More than 50% of patients were «salvage group» patients.

Materials and methods

106 patients with high-risk AL, median age 7 y.o. (range 0-18), acute lymphoblastic leukemia (ALL) – 63 (59.4%), acute myeloid leukemia (AML) – 43 (40.6%), received Haplo-HSCT from December 2006 till December 2016. Forty three patients (40.6%) recived Haplo-HSCT in complete remission (CR): CR1 21 patients (49%), CR2 – 13 patients (30%), CR3 – 9 patients (21%). Resistance disease or resistance relapse AL – 63 (59.4%) patients. Сonditioning regimens were as follows: MAC «GIAC» 39 patients (36.8%), MAC based on Busulfan 12mg/b.w. and Fludarabine 150 mg/mg(2) – 2 (2%), MAC reduced toxisity based on Treosulfan 42 g/m(2) – 6 (5.7%), RIC based on Melfalan 140 mg/m(2) – 40 (37.7%), RIC with Busulfan 8 mg/b.w. – 18 (17%). All patients received prophylaxis of acute graft versus host disease (aGVHD). Seroprophylaxis with ATG – ATGAM 60mg/b.w. – 39 (36.8%), posttransplant cyclophosphomide 50 mg/b.w. on D+3, D+4 – 67 (63.2%). Conventional immunosuppressive therapy: tacrolimus 47 patients (44.3%), CsA 59 patients (55.7%). Source of transplant – combined unmanipulated stimulated Haplo-bone marrow plus manipulated (positive selected CD34+) stimulated CD34+ cells – 27 patients (25.5%) and unmanipulated stimulated Haplo- bone marrow – 79 (74.5%). Stem cells dose of unmanipulated stimulated Haplo-bone marrow transplant CD34+x106/b.w. median 5.9x10(6)/b.w., stem cells dose of combined transplant median 5.9x10(6)/b.w. (range from 2.5 till 30.9х10(6)/b.w.

Statistical analysis

SPSS Statistics v.17. Overal survival (OS) was defined as time from study enrollment to death, with living patients censored on the date of the last follow-up. The Kaplan–Meier method was used to estimate OS rates, and the exact log-rank test was used to compare survival curves. Survival estimates are reported with standard errors determined by the method of Peto and Pike.

Conclusion

Haplo-HSCT in 1 and 2 remissions of AL allows to achieve 10-year OS in 64.7% of children, while the type of acute leukemia does not influence the outcome of haplo-HSCT. The acceptable frequency of development of aGVHD III0-IV0 – 18.6% allows to treat haplo-HSCT as therapy in 1 and 2 remissions of high risk group. The main complication of haplo-HSCT is relapse – 23.5% in the early posttransplant period to D + 100.

Keywords

Allogeneic hematopoietic stem cell transplantation, haploidentical, children, overall survival, relapse, graftversus- host disease.

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" } ["SUMMARY_EN"]=> array(37) { ["ID"]=> string(2) "39" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(21) "Description / Summary" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "39" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20193" ["VALUE"]=> array(2) { ["TEXT"]=> string(3462) "<p style="text-align: justify;"> Haploidentical transplantation (Haplo-HSCT) is an effective method for treating patients with high-risk acute leukemias (AL) who do not have HLA-matched related (MRD) and matched unrelated donors (MUD). During 10 years in R/G/Memorial Institute of children oncology,<br> hematology and transplantation more than 150 patients have Haplo-HSCT. More than 50% of patients were «salvage group» patients. </p> <h3 style="text-align: justify;">Materials and methods</h3> <p style="text-align: justify;"> 106 patients with high-risk AL, median age 7 y.o. (range 0-18), acute lymphoblastic leukemia (ALL) – 63 (59.4%), acute myeloid leukemia (AML) – 43 (40.6%), received Haplo-HSCT from December 2006 till December 2016. Forty three patients (40.6%) recived Haplo-HSCT in complete remission (CR): CR1 21 patients (49%), CR2 – 13 patients (30%), CR3 – 9 patients (21%). Resistance disease or resistance relapse AL – 63 (59.4%) patients. Сonditioning regimens were as follows: MAC «GIAC» 39 patients (36.8%), MAC based on Busulfan 12mg/b.w. and Fludarabine 150 mg/mg(2) – 2 (2%), MAC reduced toxisity based on Treosulfan 42 g/m(2) – 6 (5.7%), RIC based on Melfalan 140 mg/m(2) – 40 (37.7%), RIC with Busulfan 8 mg/b.w. – 18 (17%). All patients received prophylaxis of acute graft versus host disease (aGVHD). Seroprophylaxis with ATG – ATGAM 60mg/b.w. – 39 (36.8%), posttransplant cyclophosphomide 50 mg/b.w. on D+3, D+4 – 67 (63.2%). Conventional immunosuppressive therapy: tacrolimus 47 patients (44.3%), CsA 59 patients (55.7%). Source of transplant – combined unmanipulated stimulated Haplo-bone marrow plus manipulated (positive selected CD34+) stimulated CD34+ cells – 27 patients (25.5%) and unmanipulated stimulated Haplo- bone marrow – 79 (74.5%). Stem cells dose of unmanipulated stimulated Haplo-bone marrow transplant CD34+x106/b.w. median 5.9x10(6)/b.w., stem cells dose of combined transplant median 5.9x10(6)/b.w. (range from 2.5 till 30.9х10(6)/b.w. </p> <h3 style="text-align: justify;">Statistical analysis</h3> <p style="text-align: justify;"> SPSS Statistics v.17. Overal survival (OS) was defined as time from study enrollment to death, with living patients censored on the date of the last follow-up. The Kaplan–Meier method was used to estimate OS rates, and the exact log-rank test was used to compare survival curves. Survival estimates are reported with standard errors determined by the method of Peto and Pike. </p> <h3 style="text-align: justify;">Conclusion</h3> <p style="text-align: justify;"> Haplo-HSCT in 1 and 2 remissions of AL allows to achieve 10-year OS in 64.7% of children, while the type of acute leukemia does not influence the outcome of haplo-HSCT. The acceptable frequency of development of aGVHD III0-IV0 – 18.6% allows to treat haplo-HSCT as therapy in 1 and 2 remissions of high risk group. The main complication of haplo-HSCT is relapse – 23.5% in the early posttransplant period to D + 100. </p> <h3 style="text-align: justify;">Keywords</h3> <p style="text-align: justify;"> Allogeneic hematopoietic stem cell transplantation, haploidentical, children, overall survival, relapse, graftversus- host disease. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(3258) "

Haploidentical transplantation (Haplo-HSCT) is an effective method for treating patients with high-risk acute leukemias (AL) who do not have HLA-matched related (MRD) and matched unrelated donors (MUD). During 10 years in R/G/Memorial Institute of children oncology,
hematology and transplantation more than 150 patients have Haplo-HSCT. More than 50% of patients were «salvage group» patients.

Materials and methods

106 patients with high-risk AL, median age 7 y.o. (range 0-18), acute lymphoblastic leukemia (ALL) – 63 (59.4%), acute myeloid leukemia (AML) – 43 (40.6%), received Haplo-HSCT from December 2006 till December 2016. Forty three patients (40.6%) recived Haplo-HSCT in complete remission (CR): CR1 21 patients (49%), CR2 – 13 patients (30%), CR3 – 9 patients (21%). Resistance disease or resistance relapse AL – 63 (59.4%) patients. Сonditioning regimens were as follows: MAC «GIAC» 39 patients (36.8%), MAC based on Busulfan 12mg/b.w. and Fludarabine 150 mg/mg(2) – 2 (2%), MAC reduced toxisity based on Treosulfan 42 g/m(2) – 6 (5.7%), RIC based on Melfalan 140 mg/m(2) – 40 (37.7%), RIC with Busulfan 8 mg/b.w. – 18 (17%). All patients received prophylaxis of acute graft versus host disease (aGVHD). Seroprophylaxis with ATG – ATGAM 60mg/b.w. – 39 (36.8%), posttransplant cyclophosphomide 50 mg/b.w. on D+3, D+4 – 67 (63.2%). Conventional immunosuppressive therapy: tacrolimus 47 patients (44.3%), CsA 59 patients (55.7%). Source of transplant – combined unmanipulated stimulated Haplo-bone marrow plus manipulated (positive selected CD34+) stimulated CD34+ cells – 27 patients (25.5%) and unmanipulated stimulated Haplo- bone marrow – 79 (74.5%). Stem cells dose of unmanipulated stimulated Haplo-bone marrow transplant CD34+x106/b.w. median 5.9x10(6)/b.w., stem cells dose of combined transplant median 5.9x10(6)/b.w. (range from 2.5 till 30.9х10(6)/b.w.

Statistical analysis

SPSS Statistics v.17. Overal survival (OS) was defined as time from study enrollment to death, with living patients censored on the date of the last follow-up. The Kaplan–Meier method was used to estimate OS rates, and the exact log-rank test was used to compare survival curves. Survival estimates are reported with standard errors determined by the method of Peto and Pike.

Conclusion

Haplo-HSCT in 1 and 2 remissions of AL allows to achieve 10-year OS in 64.7% of children, while the type of acute leukemia does not influence the outcome of haplo-HSCT. The acceptable frequency of development of aGVHD III0-IV0 – 18.6% allows to treat haplo-HSCT as therapy in 1 and 2 remissions of high risk group. The main complication of haplo-HSCT is relapse – 23.5% in the early posttransplant period to D + 100.

Keywords

Allogeneic hematopoietic stem cell transplantation, haploidentical, children, overall survival, relapse, graftversus- host disease.

" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(21) "Description / Summary" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["DISPLAY_VALUE"]=> string(3258) "

Haploidentical transplantation (Haplo-HSCT) is an effective method for treating patients with high-risk acute leukemias (AL) who do not have HLA-matched related (MRD) and matched unrelated donors (MUD). During 10 years in R/G/Memorial Institute of children oncology,
hematology and transplantation more than 150 patients have Haplo-HSCT. More than 50% of patients were «salvage group» patients.

Materials and methods

106 patients with high-risk AL, median age 7 y.o. (range 0-18), acute lymphoblastic leukemia (ALL) – 63 (59.4%), acute myeloid leukemia (AML) – 43 (40.6%), received Haplo-HSCT from December 2006 till December 2016. Forty three patients (40.6%) recived Haplo-HSCT in complete remission (CR): CR1 21 patients (49%), CR2 – 13 patients (30%), CR3 – 9 patients (21%). Resistance disease or resistance relapse AL – 63 (59.4%) patients. Сonditioning regimens were as follows: MAC «GIAC» 39 patients (36.8%), MAC based on Busulfan 12mg/b.w. and Fludarabine 150 mg/mg(2) – 2 (2%), MAC reduced toxisity based on Treosulfan 42 g/m(2) – 6 (5.7%), RIC based on Melfalan 140 mg/m(2) – 40 (37.7%), RIC with Busulfan 8 mg/b.w. – 18 (17%). All patients received prophylaxis of acute graft versus host disease (aGVHD). Seroprophylaxis with ATG – ATGAM 60mg/b.w. – 39 (36.8%), posttransplant cyclophosphomide 50 mg/b.w. on D+3, D+4 – 67 (63.2%). Conventional immunosuppressive therapy: tacrolimus 47 patients (44.3%), CsA 59 patients (55.7%). Source of transplant – combined unmanipulated stimulated Haplo-bone marrow plus manipulated (positive selected CD34+) stimulated CD34+ cells – 27 patients (25.5%) and unmanipulated stimulated Haplo- bone marrow – 79 (74.5%). Stem cells dose of unmanipulated stimulated Haplo-bone marrow transplant CD34+x106/b.w. median 5.9x10(6)/b.w., stem cells dose of combined transplant median 5.9x10(6)/b.w. (range from 2.5 till 30.9х10(6)/b.w.

Statistical analysis

SPSS Statistics v.17. Overal survival (OS) was defined as time from study enrollment to death, with living patients censored on the date of the last follow-up. The Kaplan–Meier method was used to estimate OS rates, and the exact log-rank test was used to compare survival curves. Survival estimates are reported with standard errors determined by the method of Peto and Pike.

Conclusion

Haplo-HSCT in 1 and 2 remissions of AL allows to achieve 10-year OS in 64.7% of children, while the type of acute leukemia does not influence the outcome of haplo-HSCT. The acceptable frequency of development of aGVHD III0-IV0 – 18.6% allows to treat haplo-HSCT as therapy in 1 and 2 remissions of high risk group. The main complication of haplo-HSCT is relapse – 23.5% in the early posttransplant period to D + 100.

Keywords

Allogeneic hematopoietic stem cell transplantation, haploidentical, children, overall survival, relapse, graftversus- host disease.

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Афанасьев" } ["SUMMARY_RU"]=> array(37) { ["ID"]=> string(2) "27" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(29) "Описание/Резюме" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "27" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20189" ["VALUE"]=> array(2) { ["TEXT"]=> string(7222) "<p style="text-align: justify;"> Гаплоидентичная трансплантация (гапло-ТГСК) эффективный метод лечения пациентов с острыми лейкозами высокой группы риска (ОЛ), не имеющих полностью совместимого по генам HLA-системы родственного донора и неродственного донора в Международном регистре. За десятилетний период в НИИ ДОГиТ им. Р. М. Горбачевой выполнено более 150 аллогенных трансплантаций от гаплоидентичного донора, превалирующая часть, как терапия «спасения» больным в первично-резистентном течении ОЛ и/или резистентном течением рецидива ОЛ. </p> <h3 style="text-align: justify;">Цель</h3> <p style="text-align: justify;"> Оценить эффективность гапло-ТГСК у больных с ОЛ высокой группы риска, выполненной в 1 и 2 ремиссии. </p> <h3 style="text-align: justify;">Материалы и методы</h3> <p style="text-align: justify;"> 106 больных с ОЛ высокой группы риска, медиана возраста 7 лет (от 0 до 18 лет), ОЛЛ – 63 (59,4%), ОМЛ – 43 (40,6%), получивших гапло-ТГСК с декабря 2006 года по декабрь 2016 года. В ремиссии заболевания гапло-ТГСК выполнена у 43 больных (40,6%): в 1й ремиссии – 21 (49%), во 2й – 13 больных (30%), в 3й – 9 (21%). В резистентном течении болезни или рецидиве ОЛ – 63 (59,4%) пациента. МАК «GIAC» 39 человек (36,8%), МАК на основе Бусульфана 12мг/кг и Флюдарабина 150мг/м(2) – 2 (2%), МАК со сниженной токсичностью на основе Треосульфана 42 г/м2 – 6 (5,7%), РИК на основе Мелфалана 140мг/м(2) у 40 (37,7%), РИК с использованием Бусульфана 8мг/кг – 18 (17%). Все больные получили профилактику острой реакции «трансплантата против хозяина» (оРТПХ). Серопрофилактика АТГАМ 60мг/кг – 39 (36,8%), ПТЦф 50мг/кг Д+3, Д+4 – 67 (63,2%). Базовая ИСТ: такролимус 47 (44,3%), циклоспорин А в 59 (55,7%) случаях. Источник трансплантата ГСК праймированный КМ и ПСКК, в комбинации – 27 (25,5%) и гапло-КМ – 79 (74,5%). Клеточность трансплантата КМ по CD34+x106/кг от 1 до 9х10<sup>6</sup>/кг (медиана 5,9х10<sup>6</sup>/кг), клеточность КМ+ПСКК от 2,5 до 30,9х10<sup>6</sup>/ кг (медиана 5,9х10<sup>6</sup>/кг). Статистический анализ: SPSS Statistics v.17. Выживаемость и кумулятивная веро ятность анализированы по методу Каплана-Майера. Пациенты, живущие в ремиссии на момент анализа данных, цензурированы 01.01.2018 года. Сравнение ОВ выполнялось при помощи log-rang теста, сравнительный анализ разности долей – точного теста Fisher. Статистически значимыми считались различия при p&lt;0,05. </p> <h3 style="text-align: justify;">Результаты</h3> <p style="text-align: justify;"> Приживление трансплантата после гало-ТГСК зафиксировано у 80 (75,7%) реципиентов. Медиана приживления составила Д+24 (Д+14 – Д+34). Первичное неприживление трансплантата зафиксировано у 26 (24,5%) пациентов по причине химиорезистентности и резистентного течения рецидива ОЛ. Медианы восстановления: гранулоциты (&gt;0,5x10<sup>6</sup>/л) Д+21 (Д+10 – Д+47), лейкоциты (&gt;1,0 x109/л) Д+20 (Д+10 – Д+47), тромбоциты (&gt;20x10<sup>6</sup>/л) Д+20 (Д+10 – Д+72), лимфоциты (&gt;30x10<sup>6</sup>/л) Д+17 (Д+12 – Д+73). Полный донорский химеризм к 30-му дню определялся у 67 (83,8%) пациентов, к 60 дню – у 13 (16,2%). 10-летняя ОВ после гапло – ТГСК – 33,3%. Выживаемость в 1 и 2 ремиссиях составила 64,7% против 18,1% в группе трансплантированных вне ремиссии (р=0,01). Тип ОЛ не повлиял на ОВ 36,5% против 27,9% ОЛЛ и ОМЛ соответственно. Частота развития рецидивов после гапло-ТГСК, выполненной в 1 и 2 ремиссии составила 23,5%, с медианой наступления Д+88 (Д+30 – Д+301). Частота развития оРТПХ II0 – 21 (26,3%) человек, оРТПХ III0-IV0 – 15 (18,6%) человек. </p> <h3 style="text-align: justify;">Выводы</h3> <p style="text-align: justify;"> Гапло-ТГСК в 1 и 2 ремиссиях ОЛ, позволяет достигнуть 10-летней ОВ у 64,7% детей, при этом тип острого лейкоза не влияет на исход гапло-ТГСК. Приемлемая частота развития оРТПХ III0-IV0 – 18,6% позволяет рассматривать гапло-ТГСК, как терапию в 1 и 2 ремиссиях ОЛ высокой группы риска. Основным осложнением гапло-ТГСК является рецидив – 23,5% в ранний посттрансплантационный период до Д+100. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Аллогенная трансплантация гемопоэтических клеток, гаплоидентичная, дети, общая выживаемость, рецидивирование, реакция «трансплантат против хозяина». </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(6876) "

Гаплоидентичная трансплантация (гапло-ТГСК) эффективный метод лечения пациентов с острыми лейкозами высокой группы риска (ОЛ), не имеющих полностью совместимого по генам HLA-системы родственного донора и неродственного донора в Международном регистре. За десятилетний период в НИИ ДОГиТ им. Р. М. Горбачевой выполнено более 150 аллогенных трансплантаций от гаплоидентичного донора, превалирующая часть, как терапия «спасения» больным в первично-резистентном течении ОЛ и/или резистентном течением рецидива ОЛ.

Цель

Оценить эффективность гапло-ТГСК у больных с ОЛ высокой группы риска, выполненной в 1 и 2 ремиссии.

Материалы и методы

106 больных с ОЛ высокой группы риска, медиана возраста 7 лет (от 0 до 18 лет), ОЛЛ – 63 (59,4%), ОМЛ – 43 (40,6%), получивших гапло-ТГСК с декабря 2006 года по декабрь 2016 года. В ремиссии заболевания гапло-ТГСК выполнена у 43 больных (40,6%): в 1й ремиссии – 21 (49%), во 2й – 13 больных (30%), в 3й – 9 (21%). В резистентном течении болезни или рецидиве ОЛ – 63 (59,4%) пациента. МАК «GIAC» 39 человек (36,8%), МАК на основе Бусульфана 12мг/кг и Флюдарабина 150мг/м(2) – 2 (2%), МАК со сниженной токсичностью на основе Треосульфана 42 г/м2 – 6 (5,7%), РИК на основе Мелфалана 140мг/м(2) у 40 (37,7%), РИК с использованием Бусульфана 8мг/кг – 18 (17%). Все больные получили профилактику острой реакции «трансплантата против хозяина» (оРТПХ). Серопрофилактика АТГАМ 60мг/кг – 39 (36,8%), ПТЦф 50мг/кг Д+3, Д+4 – 67 (63,2%). Базовая ИСТ: такролимус 47 (44,3%), циклоспорин А в 59 (55,7%) случаях. Источник трансплантата ГСК праймированный КМ и ПСКК, в комбинации – 27 (25,5%) и гапло-КМ – 79 (74,5%). Клеточность трансплантата КМ по CD34+x106/кг от 1 до 9х106/кг (медиана 5,9х106/кг), клеточность КМ+ПСКК от 2,5 до 30,9х106/ кг (медиана 5,9х106/кг). Статистический анализ: SPSS Statistics v.17. Выживаемость и кумулятивная веро ятность анализированы по методу Каплана-Майера. Пациенты, живущие в ремиссии на момент анализа данных, цензурированы 01.01.2018 года. Сравнение ОВ выполнялось при помощи log-rang теста, сравнительный анализ разности долей – точного теста Fisher. Статистически значимыми считались различия при p<0,05.

Результаты

Приживление трансплантата после гало-ТГСК зафиксировано у 80 (75,7%) реципиентов. Медиана приживления составила Д+24 (Д+14 – Д+34). Первичное неприживление трансплантата зафиксировано у 26 (24,5%) пациентов по причине химиорезистентности и резистентного течения рецидива ОЛ. Медианы восстановления: гранулоциты (>0,5x106/л) Д+21 (Д+10 – Д+47), лейкоциты (>1,0 x109/л) Д+20 (Д+10 – Д+47), тромбоциты (>20x106/л) Д+20 (Д+10 – Д+72), лимфоциты (>30x106/л) Д+17 (Д+12 – Д+73). Полный донорский химеризм к 30-му дню определялся у 67 (83,8%) пациентов, к 60 дню – у 13 (16,2%). 10-летняя ОВ после гапло – ТГСК – 33,3%. Выживаемость в 1 и 2 ремиссиях составила 64,7% против 18,1% в группе трансплантированных вне ремиссии (р=0,01). Тип ОЛ не повлиял на ОВ 36,5% против 27,9% ОЛЛ и ОМЛ соответственно. Частота развития рецидивов после гапло-ТГСК, выполненной в 1 и 2 ремиссии составила 23,5%, с медианой наступления Д+88 (Д+30 – Д+301). Частота развития оРТПХ II0 – 21 (26,3%) человек, оРТПХ III0-IV0 – 15 (18,6%) человек.

Выводы

Гапло-ТГСК в 1 и 2 ремиссиях ОЛ, позволяет достигнуть 10-летней ОВ у 64,7% детей, при этом тип острого лейкоза не влияет на исход гапло-ТГСК. Приемлемая частота развития оРТПХ III0-IV0 – 18,6% позволяет рассматривать гапло-ТГСК, как терапию в 1 и 2 ремиссиях ОЛ высокой группы риска. Основным осложнением гапло-ТГСК является рецидив – 23,5% в ранний посттрансплантационный период до Д+100.

Ключевые слова

Аллогенная трансплантация гемопоэтических клеток, гаплоидентичная, дети, общая выживаемость, рецидивирование, реакция «трансплантат против хозяина».

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Гаплоидентичная трансплантация (гапло-ТГСК) эффективный метод лечения пациентов с острыми лейкозами высокой группы риска (ОЛ), не имеющих полностью совместимого по генам HLA-системы родственного донора и неродственного донора в Международном регистре. За десятилетний период в НИИ ДОГиТ им. Р. М. Горбачевой выполнено более 150 аллогенных трансплантаций от гаплоидентичного донора, превалирующая часть, как терапия «спасения» больным в первично-резистентном течении ОЛ и/или резистентном течением рецидива ОЛ.

Цель

Оценить эффективность гапло-ТГСК у больных с ОЛ высокой группы риска, выполненной в 1 и 2 ремиссии.

Материалы и методы

106 больных с ОЛ высокой группы риска, медиана возраста 7 лет (от 0 до 18 лет), ОЛЛ – 63 (59,4%), ОМЛ – 43 (40,6%), получивших гапло-ТГСК с декабря 2006 года по декабрь 2016 года. В ремиссии заболевания гапло-ТГСК выполнена у 43 больных (40,6%): в 1й ремиссии – 21 (49%), во 2й – 13 больных (30%), в 3й – 9 (21%). В резистентном течении болезни или рецидиве ОЛ – 63 (59,4%) пациента. МАК «GIAC» 39 человек (36,8%), МАК на основе Бусульфана 12мг/кг и Флюдарабина 150мг/м(2) – 2 (2%), МАК со сниженной токсичностью на основе Треосульфана 42 г/м2 – 6 (5,7%), РИК на основе Мелфалана 140мг/м(2) у 40 (37,7%), РИК с использованием Бусульфана 8мг/кг – 18 (17%). Все больные получили профилактику острой реакции «трансплантата против хозяина» (оРТПХ). Серопрофилактика АТГАМ 60мг/кг – 39 (36,8%), ПТЦф 50мг/кг Д+3, Д+4 – 67 (63,2%). Базовая ИСТ: такролимус 47 (44,3%), циклоспорин А в 59 (55,7%) случаях. Источник трансплантата ГСК праймированный КМ и ПСКК, в комбинации – 27 (25,5%) и гапло-КМ – 79 (74,5%). Клеточность трансплантата КМ по CD34+x106/кг от 1 до 9х106/кг (медиана 5,9х106/кг), клеточность КМ+ПСКК от 2,5 до 30,9х106/ кг (медиана 5,9х106/кг). Статистический анализ: SPSS Statistics v.17. Выживаемость и кумулятивная веро ятность анализированы по методу Каплана-Майера. Пациенты, живущие в ремиссии на момент анализа данных, цензурированы 01.01.2018 года. Сравнение ОВ выполнялось при помощи log-rang теста, сравнительный анализ разности долей – точного теста Fisher. Статистически значимыми считались различия при p<0,05.

Результаты

Приживление трансплантата после гало-ТГСК зафиксировано у 80 (75,7%) реципиентов. Медиана приживления составила Д+24 (Д+14 – Д+34). Первичное неприживление трансплантата зафиксировано у 26 (24,5%) пациентов по причине химиорезистентности и резистентного течения рецидива ОЛ. Медианы восстановления: гранулоциты (>0,5x106/л) Д+21 (Д+10 – Д+47), лейкоциты (>1,0 x109/л) Д+20 (Д+10 – Д+47), тромбоциты (>20x106/л) Д+20 (Д+10 – Д+72), лимфоциты (>30x106/л) Д+17 (Д+12 – Д+73). Полный донорский химеризм к 30-му дню определялся у 67 (83,8%) пациентов, к 60 дню – у 13 (16,2%). 10-летняя ОВ после гапло – ТГСК – 33,3%. Выживаемость в 1 и 2 ремиссиях составила 64,7% против 18,1% в группе трансплантированных вне ремиссии (р=0,01). Тип ОЛ не повлиял на ОВ 36,5% против 27,9% ОЛЛ и ОМЛ соответственно. Частота развития рецидивов после гапло-ТГСК, выполненной в 1 и 2 ремиссии составила 23,5%, с медианой наступления Д+88 (Д+30 – Д+301). Частота развития оРТПХ II0 – 21 (26,3%) человек, оРТПХ III0-IV0 – 15 (18,6%) человек.

Выводы

Гапло-ТГСК в 1 и 2 ремиссиях ОЛ, позволяет достигнуть 10-летней ОВ у 64,7% детей, при этом тип острого лейкоза не влияет на исход гапло-ТГСК. Приемлемая частота развития оРТПХ III0-IV0 – 18,6% позволяет рассматривать гапло-ТГСК, как терапию в 1 и 2 ремиссиях ОЛ высокой группы риска. Основным осложнением гапло-ТГСК является рецидив – 23,5% в ранний посттрансплантационный период до Д+100.

Ключевые слова

Аллогенная трансплантация гемопоэтических клеток, гаплоидентичная, дети, общая выживаемость, рецидивирование, реакция «трансплантат против хозяина».

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Introduction

Aplastic anemia (АА) is the most common clinical form of bone marrow failure which is still considered as a non-malignant disorder. However, W. Dameshek (1967) has noticed that severe AA may transform into paroxysmal nocturnal hemoglobinuria (PNH), secondary myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML) [1]. At the present time, this dependence is confirmed by numerous studies [2-15]. Moreover, recent data show high incidence up to 50% somatic mutations in patients with acquired AA, involving genes commonly mutated in myeloid malignancies [4]. Previously, most patients died within a year after primary diagnosis of SAA, until 1980’s when implementation of antithymocyte globulin (ATG) combined with cyclosporin A (CsA) proved to be an effective immunosuppressive therapy (IST). Therefore, secondary clonal disorders in AA have become more common, due to longer survival of the patients. From 10 to 30% of AA patients treated with IST were shown to develop secondary clonal diseases, i.e., MDS/AML or PNH, with a cumulative risk of 8 to 18% within next 10 years [2-6, 7, 8, 14]. The patients with secondary disorders have worse prognosis than de novo AML or MDS cases, with a median survival of <1 year [11, 12, 13]. Diagnosis of NSAA, shorter telomere length, splenectomy, two or more ATG courses is related to increase risk for subsequent clonal complications [2, 6, 9, 10, 15, 16]. By contrary, allogeneic bone marrow transplantation aimed for AA treatment causes a sufficiently reduced risk of such secondary disorders [11]. Therapeutic experience for these patients is limited, due to their rarity in common hematological practice. Clinical remissions achieved in such patients usually short and accompanied by high minimal residual disease levels. Moreover, these patients poorly tolerate chemotherapy; they develop longer cytopenia and often die from complications. Allogeneic hematopoietic stem cell transplantation (allo-HSCT) remains the only potentially curative method for these conditions. The aim of present study was to evaluate efficiency of allo-HSCT in secondary MDS/AML evolving from AA, and to determine the factors influencing clinical outcomes.

Patients and methods

The retrospective study included 26 patients with MDS/AML, previously treated with IST due to acquired AA. The patients were observed in First St. Petersburg State I. Pavlov Medical University and Novosibirsk Institute of Clinical Immunology from July 1998 to June 2018. The survival assessment was completed at 15.06.2018. Acquired AA was diagnosed according to standard criteria (International Agranulocytosis and Aplastic Anemia Study Group, 1987). The AA severity grade was evaluated by common criteria [17, 18]. The degree of response corresponded to standard definitions [19]. Fanconi anemia and other inherited AA were not included into the study. Majority of patients (19/26), received as a combination of ATG and CsA, six patients received CsA as monotherapy. Splenectomy has been performed in other centers in seven cases. The patients were observed for a median of 6 years (range, 0.9 to 33) from the AA diagnosis. Sixteen patients were enrolled into the study group at the stage of clonal disorders. The median age at the time of AA diagnosis was 17 (range, 5 to 41) and 25 (range, 9 to 45) years at MDS/AML transformation, respectively. MDS transformation was diagnosed by characteristic morphological changes in bone marrow, increasing blast cell numbers, and typical chromosome aberrations (International Working Group on Morphology of Myelodysplastic Syndrome, 2008). Clinical MDS variant was determined according to the WHO classification (WHO classification of the myeloid neoplasms, 2016). AML was diagnosed when the ratio of blast cells in bone marrow exceeded 20%. The AML phenotype was determined by means of morphological, cytochemical, mmunophenotyping assays, as well as cytogenetic methods and molecular markers. Eight patients were treated with chemotherapy and/or hypomethylating treatment. All the patients provided informed consent for the use of their medical data for research purposes, according to the Helsinki Declaration. Eighteen patients received allo-HSCT, either from matched related donor (MRD) (n=6), matched unrelated donor (MUD) (n=9) or haploidentical donor (n=3). Most patients underwent the non-myeloablative conditioning regimen consisting of fludarabine 180 mg/m2 and busulfan 10 mg/kg (n=14). Graft-versus-host disease (GVHD) prophylaxis included the combination tacrolimus (Tx) and mycophenolate mofetil (MMF) (n=6), CsA/methotrexate combined therapy (n=6) and post-transplant cyclophosphamide (PtCy) at a dose of 50 mg/kg on D+3, D+4 (n=6). Engraftment criteria were absolute neutrophil counts of >0.5х109/L for 3 subsequent days and platelet numbers to >20х109/L in absence of preceding platelet transfusions for 7 days. The GvHD severity and grade were assessed according to Przepiorka D. et al., 1995 [20]. Clinical relapse was diagnosed upon hematological recurrence of MDS or AML signs. The overall survival parameters were evaluated by Kaplan-Meier approach, calculating the confidence interval values (CI 95%) using a log-rank test for evaluation of differences between the survival curves. Descriptive inter-group differences were evaluated with exact Fisher criterion for categorical characteristics, and Mann-Whitney U test (for 2 groups) and Kruskal-Wallis criterion (>2 groups). Univariate and multivariate survival analyses were carried out using the Cox proportional hazard model. All significant variables among those assessed in univariate analysis were considered for the multivariate model. The STATISTICA 10.0 (StatSoft Inc., USA) software was used.

Results

Clinical characteristics

A total of 26 patients were included, male/female 15/11, with median age of 25 years at the moment of MDS/AML diagnosis. More than a half of patients (n=14) had the history of non-severe AA (NSAA). Cytogenetic study was performed in twelve cases upon primary diagnostics, showing normal karyotype in all cases. The PNH clone was tested in 17 patients as a part of AA diagnostics, and a minor PNH clone was revealed in 7 cases. Moreover, three patients with partial AA remission showed signs of hemolytic PNH (resp., 4, 6 and 14 years after the debut), with subsequent PNH clone disappearance and evolution to MDS/AML, respectively, 10, 13 and 22 years later. In 7 out of 26 patients, even partial AA remission was achieved. The most common cytogenetic abnormality was monosomy 7. The demographic and clinical characteristics of the patients are presented in Table 1.

Treatment results

Eight patients with secondary AML who had no available compatible donors, received chemotherapy: «7+3» (n=3), low-dose cytarabine (n=2), FLAG (n=1) and high-dose cytarabine (n=2). MDS patients were treated with 5-azacytidine or low-dose cytarabine. All patients initially diagnosed with MDS developed AML within 24 months. All patients treated by chemotherapy/hypomethylating agents alone (n=8), died with median survival time of 6 (1 to 25) months since the malignant transformation. They all were scheduled for unrelated HSCT which, however, could not be timely performed. Among the patients subjected to allo-HSCT (n=18), eight patients are still alive, at a median follow-up time of 4.8 years (0.5 to 12 years). The 2-year overall survival (OS) in the chemotherapy alone group was 0 %, being 53.1% in HSCT group [(95% CI 41-65.2), p=0.024] as shown in Fig. 1.

Allo-HSCT for secondary MDS/AML

A total of 26 allo-HSCTs were perfo

rmed in 18 patients. Median age at the HSCT was 23 (11-44) years. The median time from MDS/AML diagnosis to HSCT was 7 (2 to 18) months. For the first HSCT, HLA-identical siblings were used for 6 patients (33%), a MUD in 9 (50 %) of cases, whereas haploidentical familial donor was used for three patients (17%). Repeated HSCT was in most cases performed from haploidentical donors (n=5). Before allo-HSCT, eight patients received hypomethylating agents (5-azacytidine, decitabine). Four of six patients achieved first complete remission after «7+3» chemotherapy. One patient was treated at low-dose cytarabine and 3 patients with myelodysplastic syndrome with multilineage dysplasia (MDS-MLD), received only supportive care. All the patients had multiple transfusions of RBC and platelets in their past history. The median of ferritin level at the time of HSCT was 1430 (205-10500) ng/mL.

36-44_Golubovskaya Table 1. Characteristics of the patients with AA transformed to MDS_AML.png


36-44_Golubovskaya Figures 1-2.png

Biological and clinical characteristics of transplanted patients and HSCT procedure are presented in Table 2. Successful engraftment was documented in 12 patients, with a median at D+16 (D+12 to D+25), platelet recovery, at D+17 (D+11 to D+20). Seven patients (39%) developed acute GVHD grade II-IV, resulted in death in 2 cases. All the HSCT survivors have clinical signs of moderate or severe chronic GVHD. Primary graft failure was registered in six patients (33%): 3 after haploidentical, 2 after unrelated and 2 after related HSCT. A secondary graft rejection was revealed in 2 patients after unrelated HSCT. Two patients developed relapse of MDS/AML. Seven patients with primary graft failure/graft rejection were subjected to repeated HSCT from haploidentical donor (n=5), related (n=1), or unrelated donors (n=1). However, the engraftment after repeated HSCT was not achieved in 5 cases, patients died in cytopenia from hemorrhagic and infectious complications. One patient after repeated MUD HSCT developed a fatal GVHD grade IV. Two patients developed the disease relapse (respectively, D+56 after related HSCT in 2 cases, and D+380 after unrelated HSCT). The causes of post-transplant mortality are presented in Table 3. Seven transplanted patients have got hypomethylating drugs at a mean of 6 courses (5-azacytidine, in 4 cases; decitabine in 3 patients) aiming to prevent relapses.

Analysis of prognostic factors

Assessment of prognostic significance for distinct biological and clinical parameters is presented in Table 4. According to further statistical evaluation, such factors as patient’s gender, age, conditioning regimen, GVHD prophylaxis, CMV status, ABO mismatch, numbers of CD34+ and mononuclear cells did not have a significant effect on overall survival (p>0,1). The use of peripheral blood as a source of graft was associated with higher overall survival (p=0.014). The overall post-transplant survival proved to be significantly dependent only on remission state at the time of HSCT (Fig. 2). HSCT timing seems to be important in patients with MDSMLD. Of the three patients only one survived, who received hematopoietic graft 2 months after the MDS diagnosis (monosomy 7, marrow dysplasia). Two deceased patients were transplanted much later, >1 year after the diagnosis, when the patients continued to receive replacement transfusions. High ferritin levels did not significantly impair survival. Of note, the transfusion load for these patients was quite significant (median RBC transfusions 23 units; platelets, 44 units by the time of HSCT).

Discussion

Treatment of the patients with secondary MDS/AML remains unresolved problem, and its results are worse to those in primary patients. Especially, one should consider high rates of severe cytopenia-associated complications after standard therapy of the patients with previously diagnosed AA, probably, due to reduced regenerative ability of bone marrow. In most patients, unstable clinical remission could be obtained after chemotherapy, with high levels of minimal residual disease. In some patients remission is not achieved, or they die from hemorrhagic and infectious complications after 1st induction course. Meanwhile, with increased life duration of IST-treated AA patients, the number of patients with secondary MDS/AML will increase. Therefore, novel algorithm is required for management of such patients.

36-44_Golubovskaya Table 2. Transplant and patients characteristics.png

36-44_Golubovskaya Table 3. Causes of death in the patients after allo-HSCT dependent on a donor type.png

36-44_Golubovskaya Table 4. Factors influencing overall survival values in HSCT (Cox regression method).png

In our study, all the non-transplanted patients have developed acute leukemia within 2 years since the MDS diagnosis. Overall 4-year survival of the patients subjected to HSCT was 40% (95% CI, 38-52) compared to zero survival among non-transplanted patients. For the patients being in remission state at the time of HSCT, the 4-year OS comprised 80 % (95% CI, 65-95), thus being in accordance with results presented by European Bone Marrow Transplantation Group [21]. Our study has confirmed that allogeneic HSCT is the only option able to cure the patient with secondary MDS/AML evolving after AA. The time interval from diagnosis of secondary disorder to HSCT is the critical factor for success, due to rapid transformation of MDS to AML, poor chemotherapy tolerance, and high risk of lethal outcome before HSCT. To provide HSCT within short terms for these patients, itis necessary to perform HLA typing of the patients at the stage of AA, in order to assess availability of potential donors (for NSAA patients as well), regular examination after IST, including cytogenetic studies of bone marrow, especially, in resistant and relapsing AA conditions. It was shown that the probability of arising pathological clones with chromosomal aberrations makes up to 40% in non-responders to IST, in 6% with partial response, and in 10% of patients well responding to the treatment. Risk for clonal disorders in the patients non-responding to IST, and in cases of preceding NSAA sufficiently exceeds appropriate hazards in the patients with partial response, full response to the therapy, and severe AA [8, 9, 10]. Our study, though performed in a small group, has detected a significantly increased OS in the patients subjected to allo-HSCT, as compared to the patients who received chemotherapy only (40% among transplanted patients versus 0 % in the non-transplanted cases), thus again stressing the role of remission state as the main factor of favorable prognosis in HSCT series. Prognostic significance of remission state was confirmed in our multifactorial analysis. However, one may suppose that, when increasing the number of patients, this factor will significantly influence the results as it was shown in other studies dealing with greater cohorts [21]. Moreover, we have noted a tendency towards better HSCT outcomes in the persons <21 years old, as well as when using the mobilized hematopoietic stem cells as a source of graft. The type of conditioning regimen also did not have significant impact on the HSCT results, but some studies declare benefits of myeloablative conditioning for treatment of secondary MDS [21, 23]. In our study, only 3 out of 16 patients were subjected to myeloablative conditioning, with engraftment in 2 of 3 cases. However, the most patients were admitted to the BMT Center after prolonged conservative therapy, and their comorbid state did not allow to performing myeloablative conditioning. Frequency of aGVHD in total was 27%, severe aGVHD (grade III-IV) was 19% and caused lethal outcome in two cases. Chronic GVHD of different grade was observed in all survivors; however, it did not result into severe disability. According to our data, primary graft failure is the most common cause for HSCT failure (33% of total group in our study). This is a significantly higher incidence compared with data reported by other authors [21, 23]. To our mind, heavy pre-treatment, multiple blood transfusions, as well as numerous courses of chemotherapy and demethylating treatment predisposing for infections, may cause this post-transplant complication. It is difficult to determine efficiency оf haploidentical HSCT in this study because of few clinical cases (n=3), however, primary non-engraftment seems to be the main problem in this HSCT option. Carrying out repeated HSCTs following primary non-engraftment allowed achieving hematopoietic recovery in two cases (25%), with one lethal outcome due to grade IV aGVHD. Therapy with hypomethylating drugs during the post-transplant period is used to prevent and treat relapses in the patients with high risk AML [24]. Our study has shown promising results of such strategy in cases of secondary MDS/AML as well.

Conclusions

Allogeneic hematopoietic stem cell transplantation is the only potentially curative method for treatment of MDS/AML occurring in the patients previously treated with immunosuppressive therapy for AA. Remission state at the time of HSCT is the main predictor for a successful transplantation. Using peripheral blood as a source of graft improves overall survival in patients with secondary MDS/AML from AA. Allo-HSCT is indicated as soon as possible in the case of registered evolution of AA to MDS/AML.

Conflict of interest

No conflicts of interests are reported.

References

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Introduction

Aplastic anemia (АА) is the most common clinical form of bone marrow failure which is still considered as a non-malignant disorder. However, W. Dameshek (1967) has noticed that severe AA may transform into paroxysmal nocturnal hemoglobinuria (PNH), secondary myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML) [1]. At the present time, this dependence is confirmed by numerous studies [2-15]. Moreover, recent data show high incidence up to 50% somatic mutations in patients with acquired AA, involving genes commonly mutated in myeloid malignancies [4]. Previously, most patients died within a year after primary diagnosis of SAA, until 1980’s when implementation of antithymocyte globulin (ATG) combined with cyclosporin A (CsA) proved to be an effective immunosuppressive therapy (IST). Therefore, secondary clonal disorders in AA have become more common, due to longer survival of the patients. From 10 to 30% of AA patients treated with IST were shown to develop secondary clonal diseases, i.e., MDS/AML or PNH, with a cumulative risk of 8 to 18% within next 10 years [2-6, 7, 8, 14]. The patients with secondary disorders have worse prognosis than de novo AML or MDS cases, with a median survival of <1 year [11, 12, 13]. Diagnosis of NSAA, shorter telomere length, splenectomy, two or more ATG courses is related to increase risk for subsequent clonal complications [2, 6, 9, 10, 15, 16]. By contrary, allogeneic bone marrow transplantation aimed for AA treatment causes a sufficiently reduced risk of such secondary disorders [11]. Therapeutic experience for these patients is limited, due to their rarity in common hematological practice. Clinical remissions achieved in such patients usually short and accompanied by high minimal residual disease levels. Moreover, these patients poorly tolerate chemotherapy; they develop longer cytopenia and often die from complications. Allogeneic hematopoietic stem cell transplantation (allo-HSCT) remains the only potentially curative method for these conditions. The aim of present study was to evaluate efficiency of allo-HSCT in secondary MDS/AML evolving from AA, and to determine the factors influencing clinical outcomes.

Patients and methods

The retrospective study included 26 patients with MDS/AML, previously treated with IST due to acquired AA. The patients were observed in First St. Petersburg State I. Pavlov Medical University and Novosibirsk Institute of Clinical Immunology from July 1998 to June 2018. The survival assessment was completed at 15.06.2018. Acquired AA was diagnosed according to standard criteria (International Agranulocytosis and Aplastic Anemia Study Group, 1987). The AA severity grade was evaluated by common criteria [17, 18]. The degree of response corresponded to standard definitions [19]. Fanconi anemia and other inherited AA were not included into the study. Majority of patients (19/26), received as a combination of ATG and CsA, six patients received CsA as monotherapy. Splenectomy has been performed in other centers in seven cases. The patients were observed for a median of 6 years (range, 0.9 to 33) from the AA diagnosis. Sixteen patients were enrolled into the study group at the stage of clonal disorders. The median age at the time of AA diagnosis was 17 (range, 5 to 41) and 25 (range, 9 to 45) years at MDS/AML transformation, respectively. MDS transformation was diagnosed by characteristic morphological changes in bone marrow, increasing blast cell numbers, and typical chromosome aberrations (International Working Group on Morphology of Myelodysplastic Syndrome, 2008). Clinical MDS variant was determined according to the WHO classification (WHO classification of the myeloid neoplasms, 2016). AML was diagnosed when the ratio of blast cells in bone marrow exceeded 20%. The AML phenotype was determined by means of morphological, cytochemical, mmunophenotyping assays, as well as cytogenetic methods and molecular markers. Eight patients were treated with chemotherapy and/or hypomethylating treatment. All the patients provided informed consent for the use of their medical data for research purposes, according to the Helsinki Declaration. Eighteen patients received allo-HSCT, either from matched related donor (MRD) (n=6), matched unrelated donor (MUD) (n=9) or haploidentical donor (n=3). Most patients underwent the non-myeloablative conditioning regimen consisting of fludarabine 180 mg/m2 and busulfan 10 mg/kg (n=14). Graft-versus-host disease (GVHD) prophylaxis included the combination tacrolimus (Tx) and mycophenolate mofetil (MMF) (n=6), CsA/methotrexate combined therapy (n=6) and post-transplant cyclophosphamide (PtCy) at a dose of 50 mg/kg on D+3, D+4 (n=6). Engraftment criteria were absolute neutrophil counts of >0.5х109/L for 3 subsequent days and platelet numbers to >20х109/L in absence of preceding platelet transfusions for 7 days. The GvHD severity and grade were assessed according to Przepiorka D. et al., 1995 [20]. Clinical relapse was diagnosed upon hematological recurrence of MDS or AML signs. The overall survival parameters were evaluated by Kaplan-Meier approach, calculating the confidence interval values (CI 95%) using a log-rank test for evaluation of differences between the survival curves. Descriptive inter-group differences were evaluated with exact Fisher criterion for categorical characteristics, and Mann-Whitney U test (for 2 groups) and Kruskal-Wallis criterion (>2 groups). Univariate and multivariate survival analyses were carried out using the Cox proportional hazard model. All significant variables among those assessed in univariate analysis were considered for the multivariate model. The STATISTICA 10.0 (StatSoft Inc., USA) software was used.

Results

Clinical characteristics

A total of 26 patients were included, male/female 15/11, with median age of 25 years at the moment of MDS/AML diagnosis. More than a half of patients (n=14) had the history of non-severe AA (NSAA). Cytogenetic study was performed in twelve cases upon primary diagnostics, showing normal karyotype in all cases. The PNH clone was tested in 17 patients as a part of AA diagnostics, and a minor PNH clone was revealed in 7 cases. Moreover, three patients with partial AA remission showed signs of hemolytic PNH (resp., 4, 6 and 14 years after the debut), with subsequent PNH clone disappearance and evolution to MDS/AML, respectively, 10, 13 and 22 years later. In 7 out of 26 patients, even partial AA remission was achieved. The most common cytogenetic abnormality was monosomy 7. The demographic and clinical characteristics of the patients are presented in Table 1.

Treatment results

Eight patients with secondary AML who had no available compatible donors, received chemotherapy: «7+3» (n=3), low-dose cytarabine (n=2), FLAG (n=1) and high-dose cytarabine (n=2). MDS patients were treated with 5-azacytidine or low-dose cytarabine. All patients initially diagnosed with MDS developed AML within 24 months. All patients treated by chemotherapy/hypomethylating agents alone (n=8), died with median survival time of 6 (1 to 25) months since the malignant transformation. They all were scheduled for unrelated HSCT which, however, could not be timely performed. Among the patients subjected to allo-HSCT (n=18), eight patients are still alive, at a median follow-up time of 4.8 years (0.5 to 12 years). The 2-year overall survival (OS) in the chemotherapy alone group was 0 %, being 53.1% in HSCT group [(95% CI 41-65.2), p=0.024] as shown in Fig. 1.

Allo-HSCT for secondary MDS/AML

A total of 26 allo-HSCTs were perfo

rmed in 18 patients. Median age at the HSCT was 23 (11-44) years. The median time from MDS/AML diagnosis to HSCT was 7 (2 to 18) months. For the first HSCT, HLA-identical siblings were used for 6 patients (33%), a MUD in 9 (50 %) of cases, whereas haploidentical familial donor was used for three patients (17%). Repeated HSCT was in most cases performed from haploidentical donors (n=5). Before allo-HSCT, eight patients received hypomethylating agents (5-azacytidine, decitabine). Four of six patients achieved first complete remission after «7+3» chemotherapy. One patient was treated at low-dose cytarabine and 3 patients with myelodysplastic syndrome with multilineage dysplasia (MDS-MLD), received only supportive care. All the patients had multiple transfusions of RBC and platelets in their past history. The median of ferritin level at the time of HSCT was 1430 (205-10500) ng/mL.

36-44_Golubovskaya Table 1. Characteristics of the patients with AA transformed to MDS_AML.png


36-44_Golubovskaya Figures 1-2.png

Biological and clinical characteristics of transplanted patients and HSCT procedure are presented in Table 2. Successful engraftment was documented in 12 patients, with a median at D+16 (D+12 to D+25), platelet recovery, at D+17 (D+11 to D+20). Seven patients (39%) developed acute GVHD grade II-IV, resulted in death in 2 cases. All the HSCT survivors have clinical signs of moderate or severe chronic GVHD. Primary graft failure was registered in six patients (33%): 3 after haploidentical, 2 after unrelated and 2 after related HSCT. A secondary graft rejection was revealed in 2 patients after unrelated HSCT. Two patients developed relapse of MDS/AML. Seven patients with primary graft failure/graft rejection were subjected to repeated HSCT from haploidentical donor (n=5), related (n=1), or unrelated donors (n=1). However, the engraftment after repeated HSCT was not achieved in 5 cases, patients died in cytopenia from hemorrhagic and infectious complications. One patient after repeated MUD HSCT developed a fatal GVHD grade IV. Two patients developed the disease relapse (respectively, D+56 after related HSCT in 2 cases, and D+380 after unrelated HSCT). The causes of post-transplant mortality are presented in Table 3. Seven transplanted patients have got hypomethylating drugs at a mean of 6 courses (5-azacytidine, in 4 cases; decitabine in 3 patients) aiming to prevent relapses.

Analysis of prognostic factors

Assessment of prognostic significance for distinct biological and clinical parameters is presented in Table 4. According to further statistical evaluation, such factors as patient’s gender, age, conditioning regimen, GVHD prophylaxis, CMV status, ABO mismatch, numbers of CD34+ and mononuclear cells did not have a significant effect on overall survival (p>0,1). The use of peripheral blood as a source of graft was associated with higher overall survival (p=0.014). The overall post-transplant survival proved to be significantly dependent only on remission state at the time of HSCT (Fig. 2). HSCT timing seems to be important in patients with MDSMLD. Of the three patients only one survived, who received hematopoietic graft 2 months after the MDS diagnosis (monosomy 7, marrow dysplasia). Two deceased patients were transplanted much later, >1 year after the diagnosis, when the patients continued to receive replacement transfusions. High ferritin levels did not significantly impair survival. Of note, the transfusion load for these patients was quite significant (median RBC transfusions 23 units; platelets, 44 units by the time of HSCT).

Discussion

Treatment of the patients with secondary MDS/AML remains unresolved problem, and its results are worse to those in primary patients. Especially, one should consider high rates of severe cytopenia-associated complications after standard therapy of the patients with previously diagnosed AA, probably, due to reduced regenerative ability of bone marrow. In most patients, unstable clinical remission could be obtained after chemotherapy, with high levels of minimal residual disease. In some patients remission is not achieved, or they die from hemorrhagic and infectious complications after 1st induction course. Meanwhile, with increased life duration of IST-treated AA patients, the number of patients with secondary MDS/AML will increase. Therefore, novel algorithm is required for management of such patients.

36-44_Golubovskaya Table 2. Transplant and patients characteristics.png

36-44_Golubovskaya Table 3. Causes of death in the patients after allo-HSCT dependent on a donor type.png

36-44_Golubovskaya Table 4. Factors influencing overall survival values in HSCT (Cox regression method).png

In our study, all the non-transplanted patients have developed acute leukemia within 2 years since the MDS diagnosis. Overall 4-year survival of the patients subjected to HSCT was 40% (95% CI, 38-52) compared to zero survival among non-transplanted patients. For the patients being in remission state at the time of HSCT, the 4-year OS comprised 80 % (95% CI, 65-95), thus being in accordance with results presented by European Bone Marrow Transplantation Group [21]. Our study has confirmed that allogeneic HSCT is the only option able to cure the patient with secondary MDS/AML evolving after AA. The time interval from diagnosis of secondary disorder to HSCT is the critical factor for success, due to rapid transformation of MDS to AML, poor chemotherapy tolerance, and high risk of lethal outcome before HSCT. To provide HSCT within short terms for these patients, itis necessary to perform HLA typing of the patients at the stage of AA, in order to assess availability of potential donors (for NSAA patients as well), regular examination after IST, including cytogenetic studies of bone marrow, especially, in resistant and relapsing AA conditions. It was shown that the probability of arising pathological clones with chromosomal aberrations makes up to 40% in non-responders to IST, in 6% with partial response, and in 10% of patients well responding to the treatment. Risk for clonal disorders in the patients non-responding to IST, and in cases of preceding NSAA sufficiently exceeds appropriate hazards in the patients with partial response, full response to the therapy, and severe AA [8, 9, 10]. Our study, though performed in a small group, has detected a significantly increased OS in the patients subjected to allo-HSCT, as compared to the patients who received chemotherapy only (40% among transplanted patients versus 0 % in the non-transplanted cases), thus again stressing the role of remission state as the main factor of favorable prognosis in HSCT series. Prognostic significance of remission state was confirmed in our multifactorial analysis. However, one may suppose that, when increasing the number of patients, this factor will significantly influence the results as it was shown in other studies dealing with greater cohorts [21]. Moreover, we have noted a tendency towards better HSCT outcomes in the persons <21 years old, as well as when using the mobilized hematopoietic stem cells as a source of graft. The type of conditioning regimen also did not have significant impact on the HSCT results, but some studies declare benefits of myeloablative conditioning for treatment of secondary MDS [21, 23]. In our study, only 3 out of 16 patients were subjected to myeloablative conditioning, with engraftment in 2 of 3 cases. However, the most patients were admitted to the BMT Center after prolonged conservative therapy, and their comorbid state did not allow to performing myeloablative conditioning. Frequency of aGVHD in total was 27%, severe aGVHD (grade III-IV) was 19% and caused lethal outcome in two cases. Chronic GVHD of different grade was observed in all survivors; however, it did not result into severe disability. According to our data, primary graft failure is the most common cause for HSCT failure (33% of total group in our study). This is a significantly higher incidence compared with data reported by other authors [21, 23]. To our mind, heavy pre-treatment, multiple blood transfusions, as well as numerous courses of chemotherapy and demethylating treatment predisposing for infections, may cause this post-transplant complication. It is difficult to determine efficiency оf haploidentical HSCT in this study because of few clinical cases (n=3), however, primary non-engraftment seems to be the main problem in this HSCT option. Carrying out repeated HSCTs following primary non-engraftment allowed achieving hematopoietic recovery in two cases (25%), with one lethal outcome due to grade IV aGVHD. Therapy with hypomethylating drugs during the post-transplant period is used to prevent and treat relapses in the patients with high risk AML [24]. Our study has shown promising results of such strategy in cases of secondary MDS/AML as well.

Conclusions

Allogeneic hematopoietic stem cell transplantation is the only potentially curative method for treatment of MDS/AML occurring in the patients previously treated with immunosuppressive therapy for AA. Remission state at the time of HSCT is the main predictor for a successful transplantation. Using peripheral blood as a source of graft improves overall survival in patients with secondary MDS/AML from AA. Allo-HSCT is indicated as soon as possible in the case of registered evolution of AA to MDS/AML.

Conflict of interest

No conflicts of interests are reported.

References

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Тем не менее, во многих исследованиях подтверждено развитие вторичного миелодиспластического синдрома и острого миелоидного лейкоза (МДС/ОМЛ) у долгоживущих пациентов с АА. Лечение пациентов с вторичным МДС/ОМЛ остается нерешенной проблемой. Целью данного исследования являлась оценка эффективности аллогенной трансплантации гемопоэтических стволовых клеток (алло-ТГСК) при развитии вторичного МДС/ОМЛ из АА и выявление факторов, оказывающих влияние на клинические исходы лечения. В исследование было включено 26 пациентов с МДС/ОМЛ,ранее получавших иммуносупрессивную терапию в рамках лечения приобретенной АА. Медиана возраста на момент установления диагноза МДС/ОМЛ составила 25 лет (9-45). Восемь пациентов, не имевших доступного совместимого донора, получали только химиотерапию, 18 пациентов получили алло-ТГСК (от полностью совместимого родственного донора (n=6), полностью совместимого неродственного донора (n=9), гаплоидентичного донора (n=3). Двухлетняя общая выживаемость (ОВ) в группе пациентов, получавших только химиотерапию, составила 0 % с равнение с 53,1% ((95% ДИ 41-65,2), p=0,024) ОВ в группе пациентов после алло-ТГСК. Для пациентов, получивших ТГСК в ремиссии заболевания ОВ, составляла 80% ((95% ДИ, 65-95), p=0,021) против 27% ОВ среди пациентов, не достигших ремиссии к моменту алло-ТГСК. Использование периферической крови в качестве источника трансплантата было ассоциировано с более высокой ОВ (р=0,014). Алло-ТГСК остается единственным потенциально излечивающим методом лечения для пациентов с вторичным МДС/ОМЛ из АА, и должна по возможности выполняться в самые кратчайшие сроки после констатации перехода АА в МДС/ОМЛ. Ремиссионный статус на момент алло-ТГСК является главным предиктором успешной трансплантации. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Апластическая анемия, миелодиспластический синдром, острый миелоидный лейкоз, трансплантация гемопоэтических стволовых клеток. </p>" ["ELEMENT_PREVIEW_PICTURE_FILE_TITLE"]=> string(325) "Миелодиспластический синдром и острый миелобластный лейкоз, развивающиеся из апластической анемии: эффективность аллогенной трансплантации гемопоэтических стволовых клеток" ["ELEMENT_DETAIL_PICTURE_FILE_ALT"]=> string(325) "Миелодиспластический синдром и острый миелобластный лейкоз, развивающиеся из апластической анемии: эффективность аллогенной трансплантации гемопоэтических стволовых клеток" ["ELEMENT_DETAIL_PICTURE_FILE_TITLE"]=> string(325) "Миелодиспластический синдром и острый миелобластный лейкоз, развивающиеся из апластической анемии: эффективность аллогенной трансплантации гемопоэтических стволовых клеток" 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Голубовская, Александр Д. Кулагин, Юлия В. Рудницкая, Елена В. Морозова, Анна А. Осипова, Варвара Н. Овечкина, Николай Ю. Цветков, Сергей Н. Бондаренко, *Борис И. Смирнов, Людмила С. Зубаровская, Инна В. Маркова, Борис В. Афанасьев" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(421) "Ирина К. Голубовская, Александр Д. Кулагин, Юлия В. Рудницкая, Елена В. Морозова, Анна А. Осипова, Варвара Н. Овечкина, Николай Ю. Цветков, Сергей Н. Бондаренко, *Борис И. Смирнов, Людмила С. Зубаровская, Инна В. Маркова, Борис В. 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Р. Горбачевой; кафедра гематологии, трансфузиологии и трансплантологии Первый Санкт-Петербургский государственный медицинский университет им. И. П. Павлова *Санкт-Петербургский государственный электротехнический университет «ЛЭТИ», Санкт-Петербург, Россия" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(584) "НИИ детской онкологии, гематологии и трансплантологии им. Р. Горбачевой; кафедра гематологии, трансфузиологии и трансплантологии Первый Санкт-Петербургский государственный медицинский университет им. И. П. Павлова *Санкт-Петербургский государственный электротехнический университет «ЛЭТИ», Санкт-Петербург, Россия" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(22) "Организации" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_RU"]=> array(36) { ["ID"]=> string(2) "27" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(29) "Описание/Резюме" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "27" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20209" ["VALUE"]=> array(2) { ["TEXT"]=> string(3868) "<p style="text-align: justify;"> Апластическая анемия (АА) наиболее частый встречаемый вариант костно-мозговой недостаточности, рассматриваемый как незлокачественное заболевание. Тем не менее, во многих исследованиях подтверждено развитие вторичного миелодиспластического синдрома и острого миелоидного лейкоза (МДС/ОМЛ) у долгоживущих пациентов с АА. Лечение пациентов с вторичным МДС/ОМЛ остается нерешенной проблемой. Целью данного исследования являлась оценка эффективности аллогенной трансплантации гемопоэтических стволовых клеток (алло-ТГСК) при развитии вторичного МДС/ОМЛ из АА и выявление факторов, оказывающих влияние на клинические исходы лечения. В исследование было включено 26 пациентов с МДС/ОМЛ,ранее получавших иммуносупрессивную терапию в рамках лечения приобретенной АА. Медиана возраста на момент установления диагноза МДС/ОМЛ составила 25 лет (9-45). Восемь пациентов, не имевших доступного совместимого донора, получали только химиотерапию, 18 пациентов получили алло-ТГСК (от полностью совместимого родственного донора (n=6), полностью совместимого неродственного донора (n=9), гаплоидентичного донора (n=3). Двухлетняя общая выживаемость (ОВ) в группе пациентов, получавших только химиотерапию, составила 0 % с равнение с 53,1% ((95% ДИ 41-65,2), p=0,024) ОВ в группе пациентов после алло-ТГСК. Для пациентов, получивших ТГСК в ремиссии заболевания ОВ, составляла 80% ((95% ДИ, 65-95), p=0,021) против 27% ОВ среди пациентов, не достигших ремиссии к моменту алло-ТГСК. Использование периферической крови в качестве источника трансплантата было ассоциировано с более высокой ОВ (р=0,014). Алло-ТГСК остается единственным потенциально излечивающим методом лечения для пациентов с вторичным МДС/ОМЛ из АА, и должна по возможности выполняться в самые кратчайшие сроки после констатации перехода АА в МДС/ОМЛ. Ремиссионный статус на момент алло-ТГСК является главным предиктором успешной трансплантации. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Апластическая анемия, миелодиспластический синдром, острый миелоидный лейкоз, трансплантация гемопоэтических стволовых клеток. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(3802) "

Апластическая анемия (АА) наиболее частый встречаемый вариант костно-мозговой недостаточности, рассматриваемый как незлокачественное заболевание. Тем не менее, во многих исследованиях подтверждено развитие вторичного миелодиспластического синдрома и острого миелоидного лейкоза (МДС/ОМЛ) у долгоживущих пациентов с АА. Лечение пациентов с вторичным МДС/ОМЛ остается нерешенной проблемой. Целью данного исследования являлась оценка эффективности аллогенной трансплантации гемопоэтических стволовых клеток (алло-ТГСК) при развитии вторичного МДС/ОМЛ из АА и выявление факторов, оказывающих влияние на клинические исходы лечения. В исследование было включено 26 пациентов с МДС/ОМЛ,ранее получавших иммуносупрессивную терапию в рамках лечения приобретенной АА. Медиана возраста на момент установления диагноза МДС/ОМЛ составила 25 лет (9-45). Восемь пациентов, не имевших доступного совместимого донора, получали только химиотерапию, 18 пациентов получили алло-ТГСК (от полностью совместимого родственного донора (n=6), полностью совместимого неродственного донора (n=9), гаплоидентичного донора (n=3). Двухлетняя общая выживаемость (ОВ) в группе пациентов, получавших только химиотерапию, составила 0 % с равнение с 53,1% ((95% ДИ 41-65,2), p=0,024) ОВ в группе пациентов после алло-ТГСК. Для пациентов, получивших ТГСК в ремиссии заболевания ОВ, составляла 80% ((95% ДИ, 65-95), p=0,021) против 27% ОВ среди пациентов, не достигших ремиссии к моменту алло-ТГСК. Использование периферической крови в качестве источника трансплантата было ассоциировано с более высокой ОВ (р=0,014). Алло-ТГСК остается единственным потенциально излечивающим методом лечения для пациентов с вторичным МДС/ОМЛ из АА, и должна по возможности выполняться в самые кратчайшие сроки после констатации перехода АА в МДС/ОМЛ. Ремиссионный статус на момент алло-ТГСК является главным предиктором успешной трансплантации.

Ключевые слова

Апластическая анемия, миелодиспластический синдром, острый миелоидный лейкоз, трансплантация гемопоэтических стволовых клеток.

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Golubovskaya, Alexander D. Kulagin, Yulia V. Rudnitskaya, Elena V. Morozova, Anna A.Osipova, Varvara N. Ovechkina, Nikolay Y. Tсvetkov, Sergey N.Bondarenko, *Boris I. Smirnov, Ludmila S. Zubarovskaya, Inna V. Markova, Boris V. Afanasyev" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(246) "Irina K. Golubovskaya, Alexander D. Kulagin, Yulia V. Rudnitskaya, Elena V. Morozova, Anna A.Osipova, Varvara N. Ovechkina, Nikolay Y. Tсvetkov, Sergey N.Bondarenko, *Boris I. Smirnov, Ludmila S. Zubarovskaya, Inna V. Markova, Boris V. Afanasyev" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(6) "Author" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["ORGANIZATION_EN"]=> array(36) { ["ID"]=> string(2) "38" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(12) "Organization" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(15) "ORGANIZATION_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "38" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20214" ["VALUE"]=> array(2) { ["TEXT"]=> string(289) "R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, Chair of Hematology, Transfusiology and Transplantology at The First St. Petersburg State I. Pavlov Medical University *St. Petersburg State Electrotechnical University «LETI», St. Petersburg, Russia" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(289) "R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, Chair of Hematology, Transfusiology and Transplantology at The First St. Petersburg State I. Pavlov Medical University *St. Petersburg State Electrotechnical University «LETI», St. Petersburg, Russia" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(12) "Organization" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_EN"]=> array(36) { ["ID"]=> string(2) "39" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(21) "Description / Summary" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "39" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20215" ["VALUE"]=> array(2) { ["TEXT"]=> string(2022) "<p style="text-align: justify;"> Aplastic anemia (АА) is the most common clinical form of bone marrow failure which is still considered as a non-malignant disorder. However, development secondary myelodysplastic syndrome and acute myeloid leukemia (MDS/AML) in long-term AA survivors is confirmed by numerous studies. Treatment of the patients with secondary MDS/AML remains unresolved problem. The aim of present study was to evaluate efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in secondary MDS/AML evolving from AA, and to determine the factors influencing clinical outcomes. The study included 26 patients with MDS/AML, previously treated with immunosuppressive treatment due to acquired AA. Median age was 25 (range, 9-45) years at the moment of MDS/AML diagnosis. Eight patients who had no available compatible donors, received chemotherapy alone, 18 patients received allo-HSCT (from matched related donor (n=6), matched unrelated donor (n=9), haploidentical donor (n=3)). Groups were comparable in pre-transplant characteristics of patients. The 2-year overall survival (OS) in the chemotherapy alone group was 0%, being 53.1% in HSCT group [(95% CI 41-65.2), p=0.024]. For the patients being in remission state at the time of allo-HSCT, the 4-year OS comprised 80% [(95% CI, 65-95), p=0.021] vs 27 % in non-remission group. The use of peripheral blood as a source of graft was associated with higher OS (p=0.014). Allo-HSCT remains the only potentially curative method for treatment of secondary MDS/AML from AA and should be performed as soon as possible in the case of registered evolution of AA to MDS/AML. Remission state at the time of allo-HSCT is the main predictor for a successful transplantation. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Aplastic anemia, myelodysplastic syndrome, acute myeloid leukemia, hematopoietic stem cell transplantation. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(1956) "

Aplastic anemia (АА) is the most common clinical form of bone marrow failure which is still considered as a non-malignant disorder. However, development secondary myelodysplastic syndrome and acute myeloid leukemia (MDS/AML) in long-term AA survivors is confirmed by numerous studies. Treatment of the patients with secondary MDS/AML remains unresolved problem. The aim of present study was to evaluate efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in secondary MDS/AML evolving from AA, and to determine the factors influencing clinical outcomes. The study included 26 patients with MDS/AML, previously treated with immunosuppressive treatment due to acquired AA. Median age was 25 (range, 9-45) years at the moment of MDS/AML diagnosis. Eight patients who had no available compatible donors, received chemotherapy alone, 18 patients received allo-HSCT (from matched related donor (n=6), matched unrelated donor (n=9), haploidentical donor (n=3)). Groups were comparable in pre-transplant characteristics of patients. The 2-year overall survival (OS) in the chemotherapy alone group was 0%, being 53.1% in HSCT group [(95% CI 41-65.2), p=0.024]. For the patients being in remission state at the time of allo-HSCT, the 4-year OS comprised 80% [(95% CI, 65-95), p=0.021] vs 27 % in non-remission group. The use of peripheral blood as a source of graft was associated with higher OS (p=0.014). Allo-HSCT remains the only potentially curative method for treatment of secondary MDS/AML from AA and should be performed as soon as possible in the case of registered evolution of AA to MDS/AML. Remission state at the time of allo-HSCT is the main predictor for a successful transplantation.

Keywords

Aplastic anemia, myelodysplastic syndrome, acute myeloid leukemia, hematopoietic stem cell transplantation.

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["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20213" ["VALUE"]=> array(2) { ["TEXT"]=> string(246) "Irina K. Golubovskaya, Alexander D. Kulagin, Yulia V. Rudnitskaya, Elena V. Morozova, Anna A.Osipova, Varvara N. Ovechkina, Nikolay Y. Tсvetkov, Sergey N.Bondarenko, *Boris I. Smirnov, Ludmila S. Zubarovskaya, Inna V. Markova, Boris V. Afanasyev" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(246) "Irina K. Golubovskaya, Alexander D. Kulagin, Yulia V. Rudnitskaya, Elena V. Morozova, Anna A.Osipova, Varvara N. Ovechkina, Nikolay Y. Tсvetkov, Sergey N.Bondarenko, *Boris I. Smirnov, Ludmila S. Zubarovskaya, Inna V. Markova, Boris V. Afanasyev" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(6) "Author" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["DISPLAY_VALUE"]=> string(246) "Irina K. Golubovskaya, Alexander D. Kulagin, Yulia V. Rudnitskaya, Elena V. Morozova, Anna A.Osipova, Varvara N. Ovechkina, Nikolay Y. Tсvetkov, Sergey N.Bondarenko, *Boris I. Smirnov, Ludmila S. Zubarovskaya, Inna V. Markova, Boris V. Afanasyev" } ["SUMMARY_EN"]=> array(37) { ["ID"]=> string(2) "39" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(21) "Description / Summary" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "39" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20215" ["VALUE"]=> array(2) { ["TEXT"]=> string(2022) "<p style="text-align: justify;"> Aplastic anemia (АА) is the most common clinical form of bone marrow failure which is still considered as a non-malignant disorder. However, development secondary myelodysplastic syndrome and acute myeloid leukemia (MDS/AML) in long-term AA survivors is confirmed by numerous studies. Treatment of the patients with secondary MDS/AML remains unresolved problem. The aim of present study was to evaluate efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in secondary MDS/AML evolving from AA, and to determine the factors influencing clinical outcomes. The study included 26 patients with MDS/AML, previously treated with immunosuppressive treatment due to acquired AA. Median age was 25 (range, 9-45) years at the moment of MDS/AML diagnosis. Eight patients who had no available compatible donors, received chemotherapy alone, 18 patients received allo-HSCT (from matched related donor (n=6), matched unrelated donor (n=9), haploidentical donor (n=3)). Groups were comparable in pre-transplant characteristics of patients. The 2-year overall survival (OS) in the chemotherapy alone group was 0%, being 53.1% in HSCT group [(95% CI 41-65.2), p=0.024]. For the patients being in remission state at the time of allo-HSCT, the 4-year OS comprised 80% [(95% CI, 65-95), p=0.021] vs 27 % in non-remission group. The use of peripheral blood as a source of graft was associated with higher OS (p=0.014). Allo-HSCT remains the only potentially curative method for treatment of secondary MDS/AML from AA and should be performed as soon as possible in the case of registered evolution of AA to MDS/AML. Remission state at the time of allo-HSCT is the main predictor for a successful transplantation. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Aplastic anemia, myelodysplastic syndrome, acute myeloid leukemia, hematopoietic stem cell transplantation. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(1956) "

Aplastic anemia (АА) is the most common clinical form of bone marrow failure which is still considered as a non-malignant disorder. However, development secondary myelodysplastic syndrome and acute myeloid leukemia (MDS/AML) in long-term AA survivors is confirmed by numerous studies. Treatment of the patients with secondary MDS/AML remains unresolved problem. The aim of present study was to evaluate efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in secondary MDS/AML evolving from AA, and to determine the factors influencing clinical outcomes. The study included 26 patients with MDS/AML, previously treated with immunosuppressive treatment due to acquired AA. Median age was 25 (range, 9-45) years at the moment of MDS/AML diagnosis. Eight patients who had no available compatible donors, received chemotherapy alone, 18 patients received allo-HSCT (from matched related donor (n=6), matched unrelated donor (n=9), haploidentical donor (n=3)). Groups were comparable in pre-transplant characteristics of patients. The 2-year overall survival (OS) in the chemotherapy alone group was 0%, being 53.1% in HSCT group [(95% CI 41-65.2), p=0.024]. For the patients being in remission state at the time of allo-HSCT, the 4-year OS comprised 80% [(95% CI, 65-95), p=0.021] vs 27 % in non-remission group. The use of peripheral blood as a source of graft was associated with higher OS (p=0.014). Allo-HSCT remains the only potentially curative method for treatment of secondary MDS/AML from AA and should be performed as soon as possible in the case of registered evolution of AA to MDS/AML. Remission state at the time of allo-HSCT is the main predictor for a successful transplantation.

Keywords

Aplastic anemia, myelodysplastic syndrome, acute myeloid leukemia, hematopoietic stem cell transplantation.

" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(21) "Description / Summary" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["DISPLAY_VALUE"]=> string(1956) "

Aplastic anemia (АА) is the most common clinical form of bone marrow failure which is still considered as a non-malignant disorder. However, development secondary myelodysplastic syndrome and acute myeloid leukemia (MDS/AML) in long-term AA survivors is confirmed by numerous studies. Treatment of the patients with secondary MDS/AML remains unresolved problem. The aim of present study was to evaluate efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in secondary MDS/AML evolving from AA, and to determine the factors influencing clinical outcomes. The study included 26 patients with MDS/AML, previously treated with immunosuppressive treatment due to acquired AA. Median age was 25 (range, 9-45) years at the moment of MDS/AML diagnosis. Eight patients who had no available compatible donors, received chemotherapy alone, 18 patients received allo-HSCT (from matched related donor (n=6), matched unrelated donor (n=9), haploidentical donor (n=3)). Groups were comparable in pre-transplant characteristics of patients. The 2-year overall survival (OS) in the chemotherapy alone group was 0%, being 53.1% in HSCT group [(95% CI 41-65.2), p=0.024]. For the patients being in remission state at the time of allo-HSCT, the 4-year OS comprised 80% [(95% CI, 65-95), p=0.021] vs 27 % in non-remission group. The use of peripheral blood as a source of graft was associated with higher OS (p=0.014). Allo-HSCT remains the only potentially curative method for treatment of secondary MDS/AML from AA and should be performed as soon as possible in the case of registered evolution of AA to MDS/AML. Remission state at the time of allo-HSCT is the main predictor for a successful transplantation.

Keywords

Aplastic anemia, myelodysplastic syndrome, acute myeloid leukemia, hematopoietic stem cell transplantation.

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Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, Chair of Hematology, Transfusiology and Transplantology at The First St. Petersburg State I. Pavlov Medical University *St. Petersburg State Electrotechnical University «LETI», St. Petersburg, Russia" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(289) "R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, Chair of Hematology, Transfusiology and Transplantology at The First St. Petersburg State I. Pavlov Medical University *St. Petersburg State Electrotechnical University «LETI», St. Petersburg, Russia" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(12) "Organization" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["DISPLAY_VALUE"]=> string(289) "R. 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Цветков, Сергей Н. Бондаренко, *Борис И. Смирнов, Людмила С. Зубаровская, Инна В. Маркова, Борис В. Афанасьев" } ["SUMMARY_RU"]=> array(37) { ["ID"]=> string(2) "27" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(29) "Описание/Резюме" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "27" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20209" ["VALUE"]=> array(2) { ["TEXT"]=> string(3868) "<p style="text-align: justify;"> Апластическая анемия (АА) наиболее частый встречаемый вариант костно-мозговой недостаточности, рассматриваемый как незлокачественное заболевание. Тем не менее, во многих исследованиях подтверждено развитие вторичного миелодиспластического синдрома и острого миелоидного лейкоза (МДС/ОМЛ) у долгоживущих пациентов с АА. Лечение пациентов с вторичным МДС/ОМЛ остается нерешенной проблемой. Целью данного исследования являлась оценка эффективности аллогенной трансплантации гемопоэтических стволовых клеток (алло-ТГСК) при развитии вторичного МДС/ОМЛ из АА и выявление факторов, оказывающих влияние на клинические исходы лечения. В исследование было включено 26 пациентов с МДС/ОМЛ,ранее получавших иммуносупрессивную терапию в рамках лечения приобретенной АА. Медиана возраста на момент установления диагноза МДС/ОМЛ составила 25 лет (9-45). Восемь пациентов, не имевших доступного совместимого донора, получали только химиотерапию, 18 пациентов получили алло-ТГСК (от полностью совместимого родственного донора (n=6), полностью совместимого неродственного донора (n=9), гаплоидентичного донора (n=3). Двухлетняя общая выживаемость (ОВ) в группе пациентов, получавших только химиотерапию, составила 0 % с равнение с 53,1% ((95% ДИ 41-65,2), p=0,024) ОВ в группе пациентов после алло-ТГСК. Для пациентов, получивших ТГСК в ремиссии заболевания ОВ, составляла 80% ((95% ДИ, 65-95), p=0,021) против 27% ОВ среди пациентов, не достигших ремиссии к моменту алло-ТГСК. Использование периферической крови в качестве источника трансплантата было ассоциировано с более высокой ОВ (р=0,014). Алло-ТГСК остается единственным потенциально излечивающим методом лечения для пациентов с вторичным МДС/ОМЛ из АА, и должна по возможности выполняться в самые кратчайшие сроки после констатации перехода АА в МДС/ОМЛ. Ремиссионный статус на момент алло-ТГСК является главным предиктором успешной трансплантации. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Апластическая анемия, миелодиспластический синдром, острый миелоидный лейкоз, трансплантация гемопоэтических стволовых клеток. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(3802) "

Апластическая анемия (АА) наиболее частый встречаемый вариант костно-мозговой недостаточности, рассматриваемый как незлокачественное заболевание. Тем не менее, во многих исследованиях подтверждено развитие вторичного миелодиспластического синдрома и острого миелоидного лейкоза (МДС/ОМЛ) у долгоживущих пациентов с АА. Лечение пациентов с вторичным МДС/ОМЛ остается нерешенной проблемой. Целью данного исследования являлась оценка эффективности аллогенной трансплантации гемопоэтических стволовых клеток (алло-ТГСК) при развитии вторичного МДС/ОМЛ из АА и выявление факторов, оказывающих влияние на клинические исходы лечения. В исследование было включено 26 пациентов с МДС/ОМЛ,ранее получавших иммуносупрессивную терапию в рамках лечения приобретенной АА. Медиана возраста на момент установления диагноза МДС/ОМЛ составила 25 лет (9-45). Восемь пациентов, не имевших доступного совместимого донора, получали только химиотерапию, 18 пациентов получили алло-ТГСК (от полностью совместимого родственного донора (n=6), полностью совместимого неродственного донора (n=9), гаплоидентичного донора (n=3). Двухлетняя общая выживаемость (ОВ) в группе пациентов, получавших только химиотерапию, составила 0 % с равнение с 53,1% ((95% ДИ 41-65,2), p=0,024) ОВ в группе пациентов после алло-ТГСК. Для пациентов, получивших ТГСК в ремиссии заболевания ОВ, составляла 80% ((95% ДИ, 65-95), p=0,021) против 27% ОВ среди пациентов, не достигших ремиссии к моменту алло-ТГСК. Использование периферической крови в качестве источника трансплантата было ассоциировано с более высокой ОВ (р=0,014). Алло-ТГСК остается единственным потенциально излечивающим методом лечения для пациентов с вторичным МДС/ОМЛ из АА, и должна по возможности выполняться в самые кратчайшие сроки после констатации перехода АА в МДС/ОМЛ. Ремиссионный статус на момент алло-ТГСК является главным предиктором успешной трансплантации.

Ключевые слова

Апластическая анемия, миелодиспластический синдром, острый миелоидный лейкоз, трансплантация гемопоэтических стволовых клеток.

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Апластическая анемия (АА) наиболее частый встречаемый вариант костно-мозговой недостаточности, рассматриваемый как незлокачественное заболевание. Тем не менее, во многих исследованиях подтверждено развитие вторичного миелодиспластического синдрома и острого миелоидного лейкоза (МДС/ОМЛ) у долгоживущих пациентов с АА. Лечение пациентов с вторичным МДС/ОМЛ остается нерешенной проблемой. Целью данного исследования являлась оценка эффективности аллогенной трансплантации гемопоэтических стволовых клеток (алло-ТГСК) при развитии вторичного МДС/ОМЛ из АА и выявление факторов, оказывающих влияние на клинические исходы лечения. В исследование было включено 26 пациентов с МДС/ОМЛ,ранее получавших иммуносупрессивную терапию в рамках лечения приобретенной АА. Медиана возраста на момент установления диагноза МДС/ОМЛ составила 25 лет (9-45). Восемь пациентов, не имевших доступного совместимого донора, получали только химиотерапию, 18 пациентов получили алло-ТГСК (от полностью совместимого родственного донора (n=6), полностью совместимого неродственного донора (n=9), гаплоидентичного донора (n=3). Двухлетняя общая выживаемость (ОВ) в группе пациентов, получавших только химиотерапию, составила 0 % с равнение с 53,1% ((95% ДИ 41-65,2), p=0,024) ОВ в группе пациентов после алло-ТГСК. Для пациентов, получивших ТГСК в ремиссии заболевания ОВ, составляла 80% ((95% ДИ, 65-95), p=0,021) против 27% ОВ среди пациентов, не достигших ремиссии к моменту алло-ТГСК. Использование периферической крови в качестве источника трансплантата было ассоциировано с более высокой ОВ (р=0,014). Алло-ТГСК остается единственным потенциально излечивающим методом лечения для пациентов с вторичным МДС/ОМЛ из АА, и должна по возможности выполняться в самые кратчайшие сроки после констатации перехода АА в МДС/ОМЛ. Ремиссионный статус на момент алло-ТГСК является главным предиктором успешной трансплантации.

Ключевые слова

Апластическая анемия, миелодиспластический синдром, острый миелоидный лейкоз, трансплантация гемопоэтических стволовых клеток.

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Introduction

Hematopoietic stem cell transplantation (HSCT) is a rapidly developing method for the treatment of various malignant and non-malignant diseases [1]. However, it requires synchronization between donor preparation to donation, conditioning regimen, donation and graft-versus-host disease (GVHD) prophylaxis. Thus situations occur, like unexpected infection in a recipient or fulminate relapse of the underling disease, when there is a dilemma whether to transplant a patient with these unexpected conditions or postpone the transplant and administer appropriate treatment . It is well known that grafting in relapse is the worst predictive factor for long-term survival [2]. On the other hand, active infections at the start of the conditioning also impact the outcome adversely [3, 4]. Thus in the majority of cases like these the decision is made to postpone the HSCT, however this is not possible in certain situations with unrelated donors, and also when a related donor has started the stimulation with granulocyte-colony stimulating factor. In these case the graft is usually cryopreserved before infusion. The other situation leading to cryopreservation is the poor graft cellularity collected from a donor. It is well known that low number of CD3 and CD34-positive cells in the graft significantly affect the incidence of primary graft failure and poor graft function after HSCT, which are associated with significant non-relapse mortality [5, 6]. Unlike the related setting when CD34-selected boost could be collected after unrelated transplantation this might be difficult due to donor decision or logistics. Thus several centers prefer to receive and access the graft quality before the start of the conditioning, and then transfuse the cryopreserved graft. Despite the safe use of freezing stage during autologous HSCT procedure, there is a lack of large comparative studies evaluating the effects of graft cryopreservation on the outcome of allogeneic HSCT. Despite the evidence that engraftment of the cryopreserved bone marrow is comparable [7, 8], there are reports that the risk of graft failure is increased with frozen peripheral blood stem cell (PBSC) graft [9], or the risk of the GVHD might be altered after thawing [10, 11]. We conducted a single-institution pair-matched retrospective study to evaluate the impact of graft cryopreservation on the outcomes and toxicity of allogeneic stem cell transplantation.

Patients and Methods

Patients and transplantation procedures

162 patients transplanted in 2006-2017 at the I. Pavlov First St. Petersburg State Medical University were included into the study. All patients signed informed consent for the use of their medical data for research purposes, according to the Helsinki Declaration. 81 patients received the cryopreserved graft. The graft was stored with 10% DMSO at -180⁰C until the day of the transplant. The reasons for freezing were: infection before the start of the conditioning (38.3%), relapse of the underlying disease (32.2%), unavailability of a related donor at the time of HSCT (17.2%), availability of the cryopreserved graft after the first donation due to restriction of CD34 cell count (11.1%), pregnancy before the conditioning (1.2%). The study group (Cryo group) comprised predominantly adult patients with unrelated donors, leukemia as an underlying disease and reduced intensity conditioning. The study group was represented by high-risk disease with 42% of patients having DRI 3 or 4 and active disease in 40% of patients. The control group (native group) comprised 81 pairmatched patients. The criteria for matching were type of the donor, graft source (bone marrow or PBSC), diagnosis, stage of the disease at the time of the performed HSCT, intensity of the conditioning, age ±5 years, CD34 count ± 1x106/kg and graft versus host disease prophylaxis. The significance of the matching factors was in the order listed above. The resulting groups were well matched and were not significantly different in any of the patient- or transplantation-related factors (Table 1). Median follow up was 25 months, thus the two year outcomes were used in the study.

Transplantation procedures

Myeloablative conditioning (MAC) was performed with oral busulfan 16 mg/kg and cyclophosphamide 100-120 mg/kg. Reduced intensity conditioning (RIC) was performed with fludarabine 180 mg/m2 and busulfan 8-10 mg/kg. Patients were assigned to RIC if they were 40 years or older, had hematopoietic cell transplantation-specific comorbidity index (HCT-CI)≥2, exbited, at least, grade 3 hepatic toxicity during previous therapy, or uncontrolled infection at the start of the conditioning. Patients subjected to second HSCT also received RIC. GVHD prophylaxis in the post-transplantation cyclophosphamide (PTCy) group consisted of cyclophosphamide (50 mg/kg) administered at days +3, +4, tacrolimus 0.03 mg/kg and mycophenolate mofetil (MMF) 30-45 mg/kg from day +5. The classical GVHD prophylaxis included either tacrolimus with target concentrations of 5-15 ng/ml, or cyclosporine A with target concentrations of 150-350 ng/ml from day -1. As second agents in the prophylaxis regimen we used short-course methotrexate 10-15 mg/m2 at days +1, +3, +6 or mycophenolate mofetil (MMF) 30 mg/kg from day -1 to day +30.

Clinical definitions

Time to disease relapse, acute GVHD (aGVHD), moderate to severe chronic GVHD (cGVHD), non-relapse mortality (NRM), overall survival (OS), event-free survival (EFS), and GVHD-relapse free survival (GRFS) were defined as the time from transplantation to the event. All these parameters were calculated for the two-year interval. Incidence of aGVHD was calculated at 125 days after HSCT, and the time frame for the other outcomes was two years. Events for EFS were relapse or death. Events for GRFS were either death, relapse, grades III-IV acute GVHD or systemic therapy-requiring chronic GVHD. The Consensus Conference criteria and NIH criteria were used for aGVHD and cGVHD grading, respectively [12,13]. Primary graft failure was defined as the complete absence of donor chimerism in bone marrow biopsy by day +40. Time to engraftment was calculated as time from HSCT to unsupported neutrophil count > 500/ul and white blood cell count >1000/ul for 3 consecutive days.
Toxicity was assessed with CTCAE ver. 4.03. Sepsis in the study was defined as systemic inflammatory reaction with microbiologically confirmed bacteremia. The risk of the disease was accessed with disease risk index (DRI) by Armand et al. [14].

45-53_Babenko Table 1. Characteristics of patients and transplantations..png

AML=acute myeloid leukeina; ALL=acute lymphoblastic leukemia; MDS=myelodysplastic syndrome; MPN=myeloprolipherative neoplasm; CML=chronic myeloid leukemia; AA=aplastic anemia; BM=bone marrow; PBSC=peripheral blood stem cells; RIC=reduced-intensity conditioning; MAC=myeloablative conditioning; PTCy=post-transplantation cyclophosphamide.

Statistical Analysis

Comparison between the groups was performed by Chisquare test. The comparison of the quantitative parameters between groups were preformed with log-normalized t-test. The survival distributions for OS, EFS, GRFS were calculated using Kaplan-Meier methodology. The comparisons were made using the log-rank test. Cumulative incidence analysis with competing risks for aGVHD, cGVHD, relapse incidence and NRM was performed using Gray test. Relapse and NRM were accounted as competing risks. Early discontinuation of immunosuppression due to relapse or minimal residual disease was considered a competing risk for aGVHD. Donor lymphocyte infusion was considered a competing risk for cGVHD. Multivariate analysis was not performed, because patients were matched by the majority of significant variables. The subgroup analysis was performed for OS. Heterogeneities between the hazard ratios in the subgroup analysis were tested for significance using the Cochran’s Q test, with df degrees of freedom. Incidence and severity of complications were compared using Mann-Whitney test. Analyses were conducted in SAS 9.3 (SAS Institute, Inc.).

Results

Engraftment

There was a trend towards higher incidence of graft failure in the Cryo group (15.7% vs 6.3%, p=0.0588). When the graft source was analyzed separately, there was a significant increase in graft failure for BM (26% vs 0%, p=0.025), but no difference for peripheral blood (12% vs 9%, p=0.483). Among patients who engrafted there was no difference for the time of neutrophil engraftment (median 19 vs 18 days, p=0.345 in the Cryo and control groups, respectively), white blood cell recovery (18 vs 16 days, p=0.419) and platelet engraftment (17 vs 14 days, p=0.442).

45-53_Babenko Figure 1. Influence of graft cryopreservation on clinical outcomes of stem cell transplantation.png

Graft-versus-host disease, mortality and survival

No differences were observed in the incidence of acute GVHD grade II-IV (39%, 95%CI 28-50% vs 37%, 95%CI 26-48% in the Cryo and control groups, respectively, p=0.8865, Fig. 1A) and grade III-IV acute GVHD (25%, 95%CI 16-36% vs 19%, 95%CI 11-29% in the Cryo and control groups, respectively, p=0.4708). Incidence of grade I GVHD (14.8% vs 13,5%, p=0.873) as well as the incidence of steroid-refractory GVHD (9.9% vs 9.9%, p=1.0) were also not different. The incidence of moderate and severe chronic GVHD was also comparable in the study groups: Cryo group, 29% (95%CI 17-42%) vs Control group, 30% (95%CI 14-48%), p=0.3918, Fig. 1B. A significantly higher non-relapse mortality was observed for patients with cryopreserved graft: 45% (95%CI 34-56%) vs 28% (95% CI 18-39%), p=0.0145, Fig. 1C. However, the incidence of relapse was reduced the Cryo group: 21% (95% CI 12-30%) vs 34% (95% CI 23-45%), p=0.0481, Fig. 1D. This bidirectional differences resulted in absence of statistically significant impact of graft thawing on overall survival (37%, 95% CI 27-48% vs 44%, 95% CI 32-55% in the Cryo Figure 2. Subgroup analysis of overall survival and control groups, respectively, p=0.2384, Fig. 1E), EFS (35%, 95% CI 24-45% vs 40%, 95% CI 29-51%, respectively, p=0.38) and GFRS (19% ,95% CI 10-28% vs 25% , 95% CI 15-26, respectively, p=0.2041, Fig. 1F). The subgroup analysis of the OS outcome revealed no differences between cryopreserved and native graft irrespective of the conditioning intensity, graft source, age of the patients, underlying disease, status of the disease and type of donor (p>0.2, Fig. 2).

Complications of transplantation

In general, toxicity of HSCT was comparable between the groups (Fig. 3), but we observed a significant increase in the incidence of acute clinically significant renal toxicity (30% vs 10%, p=0.0046). The mean maximal creatinine observed after HSCT was 143±108 vs 114±65 μmol/l in the Cryo and control groups, respectively. Borderline differences were observed in the incidence of sepsis before engraftment (24% vs 13%, p=0.0681) and severe sepsis before engraftment (17% vs 8%, p=0.0981). Although relatively high incidence of VOD (15%) for predominantly RIC regimen was observed in the Cryo group, the difference was not statistically significant.


45-53_Babenko Figure 2. Subgroup analysis of overall survival.png
45-53_Babenko Figure 3. Complications of stem cell transplantation.png

Discussion

In this well-matched cohort of patients, we have shown that the survival of patients after HSCT with cryopreserved graft is not significantly compromised. Also we have not observed any differences in the incidence of acute and chronic GVHD. These results are comparable to the ones previously reported by Medd et al. [11], despite their cohort included predominantly matched related donors and PBSC only. Despite the comparable OS levels, we observed that NRM was significantly higher in the Cryo group, which was compensated by lower relapse risk. To our knowledge, this observation hadnot been previously reported in the literature. The increment in non-relapse mortality was primary driven by higher incidence of graft failures. This corresponds to the data previously reported by M. Lioznov et al. [9]. In our study we observed increased incidence in the BM, but not in PBSC group. However, the number of graft failures in our dataset is relatively low to draw a definitive conclusion. Since primary graft failure is a multifactorial event [6] with significant impact of anti-HLA antibodies [15], other antibody types [16], microenvironment abnormalities, particularly in MDS and MPN [17], and other potential factors, this difference in graft failure should be confirmed in large registry studies. Nonetheless, the current understanding of immune mechanisms behind graft failure might partially explain the increased Figure 3. Complications of stem cell transplantation incidence of this complication after freezing the graft. The release of specific antigens during thawing, particularly from granulocytes, might trigger both the antibody-mediated and T-cell-mediated rejection [18]. The other complication leading to non-relapse mortality was the tendency to higher incidence of sepsis. It is unlikely that the mechanisms behind this observation are related to the cryopreservation of the graft. It was rather due to difference between groups. For the majority of patients in the Cryo group, the reason for freezing the graft was an unexpected infection. This indicates that this group might have been more prone to infections. In allo HSCT recipients this is usually associated by iron overload [19], and the groups were not matched by this parameter. Also the Cryo group included patients in whom the remissions were reinduced before HSCT, using high-dose cytarabine with fludarabine. This mode of chemotherapy is usually associated with relatively high incidence of bloodstream infections [20], and recurrence of septic episodes after HSCT has previously been reported [21]. The finding about reduced risk of relapse in the study group also lacks logical explanation, since the incidence of acute and chronic GVHD was not different between the groups, and it is hard to speculate about the augmentation of graft-versus-leukemia affect. Despite the groups were matched by the disease type and stage, the abovementioned mechanism of re-induction close to the start of the conditioning might play a role. Although chemotherapy and conditioning were not sequential like in certain protocols for high-risk leukemia [22], the factor of timing is likely to play a role in the observed results.

Conclusion

Despite certain differences between the groups compared and non-randomized study design, we have demonstrated that cryopreservation of allogeneic graft is a viable option in case of complications that increase the risk of HSCT, however the benefit from postponing a transplant should be weighed against the possible risk of primary graft failure. The results of the study require confirmation in the muticenter setting or in the studies with international registry data.

Acknowledgements

The authors declare no conflict of interest.

References

1. Passweg JR, Baldomero H, Bader P, Basak GW, Bonini C, Duarte R, Dufour C, Kröger N, Kuball J, Lankester A, Montoto S, Nagler A, Snowden JA, Styczynski J, Mohty M, and EMBT. Is the use of unrelated donor transplantation leveling off in Europe? The 2016 European Society for Blood and Marrow Transplant activity survey report. Bone Marrow Transplant. 2018 Mar 14. doi: 10.1038/s41409-018-0153-1.
2. Craddock C, Hoelzer D, Komanduri KV. Current status and future clinical directions in the prevention and treatment of relapse following hematopoietic transplantation for acute myeloid and lymphoblastic leukemia. Bone Marrow Transplant. 2018 May 31. doi: 10.1038/s41409-018-0203-8.
3. He GL, Chang YJ, Xu LP, Zhang XH, Wang Y, Liu KY, Huang XJ. Impact of pre-transplant pulmonary infection developed in horizontal laminar flow unit on the outcome of subsequent allogeneic hematopoietic stem cell transplantation. J Thorac Dis. 2016;8(8):2219-2225.
4. Yamamoto W, Fujii E, Matsumoto K, Yamamoto E, Aoki J, Tanaka M, Ishigatsubo Y, Kanamori H. Prognostic value of pretransplant serum C-reactive protein in patients receiving reduced-intensity conditioning allogeneic hematopoietic stem cell transplantation. Int J Hematol. 2016;103(4):444-452.
5. Ringdén O, Barrett AJ, Zhang MJ, Loberiza FR, Bolwell BJ, Cairo MS, Gale RP, Hale GA, Litzow MR, Martino R, Russell JA, Tiberghien P, Urbano-Ispizua A, Horowitz MM. Decreased treatment failure in recipients of HLA-identical bone marrow or peripheral blood stem cell transplants with high CD34 cell doses. Br J Haematol. 2003;121(6):874-885.
6. Mattsson J, Ringden O, Storb R. Graft failure after allogeneic hematopoietic cell transplantation. Biol Blood Marrow Transplant. 2008;14(1 Suppl 1):165-170.
7. Lasky LC, Van Buren N, Weisdorf DJ, Filipovich A, McGlave P, Kersey JH, McCullough J, Ramsay NK, Blazar BR. Successful allogeneic cryopreserved marrow transplantation. Transfusion. 1989;29(2):182-184.
8. Stockschläder M, Hassan HT, Krog C Krüger W, Löliger C, Horstman M, Altnöder M, Clausen J, Grimm J, Kabisch H, Zander A. Long-term follow-up of leukaemia patients after related cryopreserved allogeneic bone marrow transplantation. Br J Haematol. 1997;96(2):382-386.
9. Lioznov M, Dellbrügger C, Sputtek A, Fehse B, Kröger N, Zander AR. Transportation and cryopreservation may impair haematopoietic stem cell function and engraftment of allogeneic PBSCs, but not BM. Bone Marrow Transplant. 2008 Jul;42(2):121-128.
10. Frey NV, Lazarus HM, Goldstein SC. Has allogeneic stem cell cryopreservation been given the 'cold shoulder'? An analysis of the pros and cons of using frozen versus fresh stem cell products in allogeneic stem cell transplantation. Bone Marrow Transplant. 2006; 38(6):399-405.
11. Medd P, Nagra S, Hollyman D, Craddock C, Malladi R. Cryopreservation of allogeneic PBSC from related and unrelated donors is associated with delayed platelet engraftment but has no impact on survival. Bone Marrow Transplant. 2013;48(2):243-248.
12. Przepiorka D, Weisdorf D, Martin P, Klingemann HG, Beatty P, Hows J, Thomas ED. 1994 Consensus Conference on Acute GVHD Grading. Bone Marrow Transplant. 1995;15:825–828.
13. Filipovich AH, Weisdorf D, Pavletic S, Socie G, Wingard JR, Lee SJ, Martin P, Chien J, Przepiorka D, Couriel D, Cowen EW, Dinndorf P, Farrell A, Hartzman R, Henslee-Downey J, Jacobsohn D, McDonald G, Mittleman B, Rizzo JD, Robinson M, Schubert M, Schultz K, Shulman H, Turner M, Vogelsang G, Flowers ME. National Institutes of Health consensus development project on criteria for clinical trials in chronic graft-versus-host disease: I. Diagnosis and staging working group report. Biol Blood Marrow Transplant. 2005;11:945–956.
14. Armand P, Kim HT, Logan BR, Wang Z, Alyea EP, Kalaycio ME, Maziarz RT, Antin JH, Soiffer RJ, Weisdorf DJ, Rizzo JD, Horowitz MM, Saber W. Validation and refinement of the Disease Risk Index for allogeneic stem cell transplantation. Blood. 2014;123(23):3664-3671.
15. Ciurea SO, Cao K, Fernadez-Vina M, Kongtim P, Malki MA, Fuchs E, Luznik L, Huang XJ, Ciceri F, Locatelli F, Aversa F, Castagna L, Bacigalupo A, Martelli M, Blaise D, Handgretinger R, Roy DC, O'Donnell P, Bashey A, Lazarus HM, Ballen K, Savani BN, Mohty M, Nagler A. The European Society for Blood and Marrow Transplantation (EBMT) Consensus Guidelines for the Detection and Treatment of Donor-specific Anti-HLA Antibodies (DSA) in Haploidentical Hematopoietic Cell Transplantation. Bone Marrow Transplant. 2018;53(5):521-534.
16. Barge AJ, Johnson G, Witherspoon R, Torok-Storb B. Antibody-mediated marrow failure after allogeneic bone marrow transplantation. Blood. 1989;74(5):1477-1480.
17. Santamaria C, Muntión S, Rosón B, Blanco B, López-Villar O, Carrancio S, Sánchez-Guijo FM, Díez-Campelo M, Alvarez-Fernández S, Sarasquete ME, de las Rivas J, González M, San Miguel JF, Del Cañizo MC. Impaired expression of DICER, DROSHA, SBDS and some microRNAs in mesenchymal stromal cells from myelodysplastic syndrome patients. Haematologica. 2012;97(8):1218-1224.
18. Chrysler G, McKenna D, Schierman T, Kadidlo D, Askari S, Miller J, Clay M, McCullough J. Cellular characteristics of cord blood and cord blood transplantation. In: Broxmeyer H, editor. Cord Blood: Biology, Immunology, Banking and Clinical Transplantation. AABB; Bethesda, MD: 2004. pp. 219–258.
19. Shaheen M, Ivanova MO, Moiseev IS, Bondarchuk SV, Afanasyev BV. Impact of initial serum ferritin on early post-HSCT complications: a single-center study.Cell Ther Transplant. 2016; 5(2): 40-49.
20. Estey E, Thall P, Andreeff M, Beran M, Kantarjian H, O'Brien S, Escudier S, Robertson LE, Koller C, Kornblau S, et al. Use of granulocyte colony-stimulating factor before, during, and after fludarabine plus cytarabine induction therapy of newly diagnosed acute myelogenous leukemia or myelodysplastic syndromes: comparison with fludarabine plus cytarabine without granulocyte colony-stimulating factor. J Clin Oncol. 1994;12(4):671-678.
21. Hakki M, Limaye AP, Kim HW, Kirby KA, Corey L, Boeckh M. Invasive Pseudomonas aeruginosa infections: high rate of recurrence and mortality after hematopoietic cell transplantation. Bone Marrow Transplant. 2007;39(11):687-693.
22. Saure C, Schroeder T, Zohren F, Groten A, Bruns I, Czibere A, Galonska L, Kondakci M, Weigelt C, Fenk R, Germing U, Haas R, Kobbe G. Upfront allogeneic blood stem cell transplantation for patients with high-risk myelodysplastic syndrome or secondary acute myeloid leukemia using a FLAMSA-based high-dose sequential conditioning regimen. Biol Blood Marrow Transplant. 2012;18(3):466-472.

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Introduction

Hematopoietic stem cell transplantation (HSCT) is a rapidly developing method for the treatment of various malignant and non-malignant diseases [1]. However, it requires synchronization between donor preparation to donation, conditioning regimen, donation and graft-versus-host disease (GVHD) prophylaxis. Thus situations occur, like unexpected infection in a recipient or fulminate relapse of the underling disease, when there is a dilemma whether to transplant a patient with these unexpected conditions or postpone the transplant and administer appropriate treatment . It is well known that grafting in relapse is the worst predictive factor for long-term survival [2]. On the other hand, active infections at the start of the conditioning also impact the outcome adversely [3, 4]. Thus in the majority of cases like these the decision is made to postpone the HSCT, however this is not possible in certain situations with unrelated donors, and also when a related donor has started the stimulation with granulocyte-colony stimulating factor. In these case the graft is usually cryopreserved before infusion. The other situation leading to cryopreservation is the poor graft cellularity collected from a donor. It is well known that low number of CD3 and CD34-positive cells in the graft significantly affect the incidence of primary graft failure and poor graft function after HSCT, which are associated with significant non-relapse mortality [5, 6]. Unlike the related setting when CD34-selected boost could be collected after unrelated transplantation this might be difficult due to donor decision or logistics. Thus several centers prefer to receive and access the graft quality before the start of the conditioning, and then transfuse the cryopreserved graft. Despite the safe use of freezing stage during autologous HSCT procedure, there is a lack of large comparative studies evaluating the effects of graft cryopreservation on the outcome of allogeneic HSCT. Despite the evidence that engraftment of the cryopreserved bone marrow is comparable [7, 8], there are reports that the risk of graft failure is increased with frozen peripheral blood stem cell (PBSC) graft [9], or the risk of the GVHD might be altered after thawing [10, 11]. We conducted a single-institution pair-matched retrospective study to evaluate the impact of graft cryopreservation on the outcomes and toxicity of allogeneic stem cell transplantation.

Patients and Methods

Patients and transplantation procedures

162 patients transplanted in 2006-2017 at the I. Pavlov First St. Petersburg State Medical University were included into the study. All patients signed informed consent for the use of their medical data for research purposes, according to the Helsinki Declaration. 81 patients received the cryopreserved graft. The graft was stored with 10% DMSO at -180⁰C until the day of the transplant. The reasons for freezing were: infection before the start of the conditioning (38.3%), relapse of the underlying disease (32.2%), unavailability of a related donor at the time of HSCT (17.2%), availability of the cryopreserved graft after the first donation due to restriction of CD34 cell count (11.1%), pregnancy before the conditioning (1.2%). The study group (Cryo group) comprised predominantly adult patients with unrelated donors, leukemia as an underlying disease and reduced intensity conditioning. The study group was represented by high-risk disease with 42% of patients having DRI 3 or 4 and active disease in 40% of patients. The control group (native group) comprised 81 pairmatched patients. The criteria for matching were type of the donor, graft source (bone marrow or PBSC), diagnosis, stage of the disease at the time of the performed HSCT, intensity of the conditioning, age ±5 years, CD34 count ± 1x106/kg and graft versus host disease prophylaxis. The significance of the matching factors was in the order listed above. The resulting groups were well matched and were not significantly different in any of the patient- or transplantation-related factors (Table 1). Median follow up was 25 months, thus the two year outcomes were used in the study.

Transplantation procedures

Myeloablative conditioning (MAC) was performed with oral busulfan 16 mg/kg and cyclophosphamide 100-120 mg/kg. Reduced intensity conditioning (RIC) was performed with fludarabine 180 mg/m2 and busulfan 8-10 mg/kg. Patients were assigned to RIC if they were 40 years or older, had hematopoietic cell transplantation-specific comorbidity index (HCT-CI)≥2, exbited, at least, grade 3 hepatic toxicity during previous therapy, or uncontrolled infection at the start of the conditioning. Patients subjected to second HSCT also received RIC. GVHD prophylaxis in the post-transplantation cyclophosphamide (PTCy) group consisted of cyclophosphamide (50 mg/kg) administered at days +3, +4, tacrolimus 0.03 mg/kg and mycophenolate mofetil (MMF) 30-45 mg/kg from day +5. The classical GVHD prophylaxis included either tacrolimus with target concentrations of 5-15 ng/ml, or cyclosporine A with target concentrations of 150-350 ng/ml from day -1. As second agents in the prophylaxis regimen we used short-course methotrexate 10-15 mg/m2 at days +1, +3, +6 or mycophenolate mofetil (MMF) 30 mg/kg from day -1 to day +30.

Clinical definitions

Time to disease relapse, acute GVHD (aGVHD), moderate to severe chronic GVHD (cGVHD), non-relapse mortality (NRM), overall survival (OS), event-free survival (EFS), and GVHD-relapse free survival (GRFS) were defined as the time from transplantation to the event. All these parameters were calculated for the two-year interval. Incidence of aGVHD was calculated at 125 days after HSCT, and the time frame for the other outcomes was two years. Events for EFS were relapse or death. Events for GRFS were either death, relapse, grades III-IV acute GVHD or systemic therapy-requiring chronic GVHD. The Consensus Conference criteria and NIH criteria were used for aGVHD and cGVHD grading, respectively [12,13]. Primary graft failure was defined as the complete absence of donor chimerism in bone marrow biopsy by day +40. Time to engraftment was calculated as time from HSCT to unsupported neutrophil count > 500/ul and white blood cell count >1000/ul for 3 consecutive days.
Toxicity was assessed with CTCAE ver. 4.03. Sepsis in the study was defined as systemic inflammatory reaction with microbiologically confirmed bacteremia. The risk of the disease was accessed with disease risk index (DRI) by Armand et al. [14].

45-53_Babenko Table 1. Characteristics of patients and transplantations..png

AML=acute myeloid leukeina; ALL=acute lymphoblastic leukemia; MDS=myelodysplastic syndrome; MPN=myeloprolipherative neoplasm; CML=chronic myeloid leukemia; AA=aplastic anemia; BM=bone marrow; PBSC=peripheral blood stem cells; RIC=reduced-intensity conditioning; MAC=myeloablative conditioning; PTCy=post-transplantation cyclophosphamide.

Statistical Analysis

Comparison between the groups was performed by Chisquare test. The comparison of the quantitative parameters between groups were preformed with log-normalized t-test. The survival distributions for OS, EFS, GRFS were calculated using Kaplan-Meier methodology. The comparisons were made using the log-rank test. Cumulative incidence analysis with competing risks for aGVHD, cGVHD, relapse incidence and NRM was performed using Gray test. Relapse and NRM were accounted as competing risks. Early discontinuation of immunosuppression due to relapse or minimal residual disease was considered a competing risk for aGVHD. Donor lymphocyte infusion was considered a competing risk for cGVHD. Multivariate analysis was not performed, because patients were matched by the majority of significant variables. The subgroup analysis was performed for OS. Heterogeneities between the hazard ratios in the subgroup analysis were tested for significance using the Cochran’s Q test, with df degrees of freedom. Incidence and severity of complications were compared using Mann-Whitney test. Analyses were conducted in SAS 9.3 (SAS Institute, Inc.).

Results

Engraftment

There was a trend towards higher incidence of graft failure in the Cryo group (15.7% vs 6.3%, p=0.0588). When the graft source was analyzed separately, there was a significant increase in graft failure for BM (26% vs 0%, p=0.025), but no difference for peripheral blood (12% vs 9%, p=0.483). Among patients who engrafted there was no difference for the time of neutrophil engraftment (median 19 vs 18 days, p=0.345 in the Cryo and control groups, respectively), white blood cell recovery (18 vs 16 days, p=0.419) and platelet engraftment (17 vs 14 days, p=0.442).

45-53_Babenko Figure 1. Influence of graft cryopreservation on clinical outcomes of stem cell transplantation.png

Graft-versus-host disease, mortality and survival

No differences were observed in the incidence of acute GVHD grade II-IV (39%, 95%CI 28-50% vs 37%, 95%CI 26-48% in the Cryo and control groups, respectively, p=0.8865, Fig. 1A) and grade III-IV acute GVHD (25%, 95%CI 16-36% vs 19%, 95%CI 11-29% in the Cryo and control groups, respectively, p=0.4708). Incidence of grade I GVHD (14.8% vs 13,5%, p=0.873) as well as the incidence of steroid-refractory GVHD (9.9% vs 9.9%, p=1.0) were also not different. The incidence of moderate and severe chronic GVHD was also comparable in the study groups: Cryo group, 29% (95%CI 17-42%) vs Control group, 30% (95%CI 14-48%), p=0.3918, Fig. 1B. A significantly higher non-relapse mortality was observed for patients with cryopreserved graft: 45% (95%CI 34-56%) vs 28% (95% CI 18-39%), p=0.0145, Fig. 1C. However, the incidence of relapse was reduced the Cryo group: 21% (95% CI 12-30%) vs 34% (95% CI 23-45%), p=0.0481, Fig. 1D. This bidirectional differences resulted in absence of statistically significant impact of graft thawing on overall survival (37%, 95% CI 27-48% vs 44%, 95% CI 32-55% in the Cryo Figure 2. Subgroup analysis of overall survival and control groups, respectively, p=0.2384, Fig. 1E), EFS (35%, 95% CI 24-45% vs 40%, 95% CI 29-51%, respectively, p=0.38) and GFRS (19% ,95% CI 10-28% vs 25% , 95% CI 15-26, respectively, p=0.2041, Fig. 1F). The subgroup analysis of the OS outcome revealed no differences between cryopreserved and native graft irrespective of the conditioning intensity, graft source, age of the patients, underlying disease, status of the disease and type of donor (p>0.2, Fig. 2).

Complications of transplantation

In general, toxicity of HSCT was comparable between the groups (Fig. 3), but we observed a significant increase in the incidence of acute clinically significant renal toxicity (30% vs 10%, p=0.0046). The mean maximal creatinine observed after HSCT was 143±108 vs 114±65 μmol/l in the Cryo and control groups, respectively. Borderline differences were observed in the incidence of sepsis before engraftment (24% vs 13%, p=0.0681) and severe sepsis before engraftment (17% vs 8%, p=0.0981). Although relatively high incidence of VOD (15%) for predominantly RIC regimen was observed in the Cryo group, the difference was not statistically significant.


45-53_Babenko Figure 2. Subgroup analysis of overall survival.png
45-53_Babenko Figure 3. Complications of stem cell transplantation.png

Discussion

In this well-matched cohort of patients, we have shown that the survival of patients after HSCT with cryopreserved graft is not significantly compromised. Also we have not observed any differences in the incidence of acute and chronic GVHD. These results are comparable to the ones previously reported by Medd et al. [11], despite their cohort included predominantly matched related donors and PBSC only. Despite the comparable OS levels, we observed that NRM was significantly higher in the Cryo group, which was compensated by lower relapse risk. To our knowledge, this observation hadnot been previously reported in the literature. The increment in non-relapse mortality was primary driven by higher incidence of graft failures. This corresponds to the data previously reported by M. Lioznov et al. [9]. In our study we observed increased incidence in the BM, but not in PBSC group. However, the number of graft failures in our dataset is relatively low to draw a definitive conclusion. Since primary graft failure is a multifactorial event [6] with significant impact of anti-HLA antibodies [15], other antibody types [16], microenvironment abnormalities, particularly in MDS and MPN [17], and other potential factors, this difference in graft failure should be confirmed in large registry studies. Nonetheless, the current understanding of immune mechanisms behind graft failure might partially explain the increased Figure 3. Complications of stem cell transplantation incidence of this complication after freezing the graft. The release of specific antigens during thawing, particularly from granulocytes, might trigger both the antibody-mediated and T-cell-mediated rejection [18]. The other complication leading to non-relapse mortality was the tendency to higher incidence of sepsis. It is unlikely that the mechanisms behind this observation are related to the cryopreservation of the graft. It was rather due to difference between groups. For the majority of patients in the Cryo group, the reason for freezing the graft was an unexpected infection. This indicates that this group might have been more prone to infections. In allo HSCT recipients this is usually associated by iron overload [19], and the groups were not matched by this parameter. Also the Cryo group included patients in whom the remissions were reinduced before HSCT, using high-dose cytarabine with fludarabine. This mode of chemotherapy is usually associated with relatively high incidence of bloodstream infections [20], and recurrence of septic episodes after HSCT has previously been reported [21]. The finding about reduced risk of relapse in the study group also lacks logical explanation, since the incidence of acute and chronic GVHD was not different between the groups, and it is hard to speculate about the augmentation of graft-versus-leukemia affect. Despite the groups were matched by the disease type and stage, the abovementioned mechanism of re-induction close to the start of the conditioning might play a role. Although chemotherapy and conditioning were not sequential like in certain protocols for high-risk leukemia [22], the factor of timing is likely to play a role in the observed results.

Conclusion

Despite certain differences between the groups compared and non-randomized study design, we have demonstrated that cryopreservation of allogeneic graft is a viable option in case of complications that increase the risk of HSCT, however the benefit from postponing a transplant should be weighed against the possible risk of primary graft failure. The results of the study require confirmation in the muticenter setting or in the studies with international registry data.

Acknowledgements

The authors declare no conflict of interest.

References

1. Passweg JR, Baldomero H, Bader P, Basak GW, Bonini C, Duarte R, Dufour C, Kröger N, Kuball J, Lankester A, Montoto S, Nagler A, Snowden JA, Styczynski J, Mohty M, and EMBT. Is the use of unrelated donor transplantation leveling off in Europe? The 2016 European Society for Blood and Marrow Transplant activity survey report. Bone Marrow Transplant. 2018 Mar 14. doi: 10.1038/s41409-018-0153-1.
2. Craddock C, Hoelzer D, Komanduri KV. Current status and future clinical directions in the prevention and treatment of relapse following hematopoietic transplantation for acute myeloid and lymphoblastic leukemia. Bone Marrow Transplant. 2018 May 31. doi: 10.1038/s41409-018-0203-8.
3. He GL, Chang YJ, Xu LP, Zhang XH, Wang Y, Liu KY, Huang XJ. Impact of pre-transplant pulmonary infection developed in horizontal laminar flow unit on the outcome of subsequent allogeneic hematopoietic stem cell transplantation. J Thorac Dis. 2016;8(8):2219-2225.
4. Yamamoto W, Fujii E, Matsumoto K, Yamamoto E, Aoki J, Tanaka M, Ishigatsubo Y, Kanamori H. Prognostic value of pretransplant serum C-reactive protein in patients receiving reduced-intensity conditioning allogeneic hematopoietic stem cell transplantation. Int J Hematol. 2016;103(4):444-452.
5. Ringdén O, Barrett AJ, Zhang MJ, Loberiza FR, Bolwell BJ, Cairo MS, Gale RP, Hale GA, Litzow MR, Martino R, Russell JA, Tiberghien P, Urbano-Ispizua A, Horowitz MM. Decreased treatment failure in recipients of HLA-identical bone marrow or peripheral blood stem cell transplants with high CD34 cell doses. Br J Haematol. 2003;121(6):874-885.
6. Mattsson J, Ringden O, Storb R. Graft failure after allogeneic hematopoietic cell transplantation. Biol Blood Marrow Transplant. 2008;14(1 Suppl 1):165-170.
7. Lasky LC, Van Buren N, Weisdorf DJ, Filipovich A, McGlave P, Kersey JH, McCullough J, Ramsay NK, Blazar BR. Successful allogeneic cryopreserved marrow transplantation. Transfusion. 1989;29(2):182-184.
8. Stockschläder M, Hassan HT, Krog C Krüger W, Löliger C, Horstman M, Altnöder M, Clausen J, Grimm J, Kabisch H, Zander A. Long-term follow-up of leukaemia patients after related cryopreserved allogeneic bone marrow transplantation. Br J Haematol. 1997;96(2):382-386.
9. Lioznov M, Dellbrügger C, Sputtek A, Fehse B, Kröger N, Zander AR. Transportation and cryopreservation may impair haematopoietic stem cell function and engraftment of allogeneic PBSCs, but not BM. Bone Marrow Transplant. 2008 Jul;42(2):121-128.
10. Frey NV, Lazarus HM, Goldstein SC. Has allogeneic stem cell cryopreservation been given the 'cold shoulder'? An analysis of the pros and cons of using frozen versus fresh stem cell products in allogeneic stem cell transplantation. Bone Marrow Transplant. 2006; 38(6):399-405.
11. Medd P, Nagra S, Hollyman D, Craddock C, Malladi R. Cryopreservation of allogeneic PBSC from related and unrelated donors is associated with delayed platelet engraftment but has no impact on survival. Bone Marrow Transplant. 2013;48(2):243-248.
12. Przepiorka D, Weisdorf D, Martin P, Klingemann HG, Beatty P, Hows J, Thomas ED. 1994 Consensus Conference on Acute GVHD Grading. Bone Marrow Transplant. 1995;15:825–828.
13. Filipovich AH, Weisdorf D, Pavletic S, Socie G, Wingard JR, Lee SJ, Martin P, Chien J, Przepiorka D, Couriel D, Cowen EW, Dinndorf P, Farrell A, Hartzman R, Henslee-Downey J, Jacobsohn D, McDonald G, Mittleman B, Rizzo JD, Robinson M, Schubert M, Schultz K, Shulman H, Turner M, Vogelsang G, Flowers ME. National Institutes of Health consensus development project on criteria for clinical trials in chronic graft-versus-host disease: I. Diagnosis and staging working group report. Biol Blood Marrow Transplant. 2005;11:945–956.
14. Armand P, Kim HT, Logan BR, Wang Z, Alyea EP, Kalaycio ME, Maziarz RT, Antin JH, Soiffer RJ, Weisdorf DJ, Rizzo JD, Horowitz MM, Saber W. Validation and refinement of the Disease Risk Index for allogeneic stem cell transplantation. Blood. 2014;123(23):3664-3671.
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Для определения клинического значения криоконсервации трансплантата было проведено исследование методом парных сравнений между 81 пациентом, получившим инфузию замороженного аллогенного трансплантата, и 81 пациентом, получившим инфузию нативного трансплантата. Критериями парного подбора были вариант и стадия заболевания, тип донора, источник трансплантата, возраст пациента, интенсивность кондиционирования, профилактика реакции «трансплантат против хозяина» (РТПХ) и количество CD34-положительных клеток в трансплантате. В исследуемой группе 83% выполнена неродственная ТГСК, 72% получили инфузию стволовых клеток периферической крови и 40% относились к группе «спасения». При сравнении группы Крио и контрольной группы не было выявлено различий в частоте острой РТПХ II-IV степени (39% vs 37%, p=0,89), средней и тяжелой хронической РТПХ (29% vs 30%, p=0,39), общей выживаемости (37% vs 44%, p=0,24), бессобытийной выживаемости (35% vs 40%, p=0,38) и выживаемости без рецидива и РТПХ (19% vs 25% , p=0,20), соответственно. Тем не менее, трансплантационная летальность (ТЛ) была значимо выше в группе Крио (45% vs 28%, p=0,015), что частично компенсировалось снижением вероятности рецидива (21% vs 34%, p=0,048). Основной причиной повышения ТЛ был тренд к большей частоте первичного неприживления трансплантата (15,7% vs 6.3%, p=0,059) и сепсиса в период аплазии кроветворения (24% vs 13%, p=0,068). Различий в скорости приживления нейтрофилов и тромбоцитов выявлено не было. Частота осложнений трансплантации была сравнима в двух группах, за исключением повышения вероятности развития нефротоксичности II-IV степени в группе криоконсервации (30% vs 10%, p=0,0046). В заключение можно сказать, что исследование показало сравнимые результаты при использовании замороженного и нативного трансплантата. 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Бабенко, Иван С. Моисеев, Михаил М. Канунников, Александр Л. Алянский, Дмитрий Э. Певцов, Анастасия В. Фролова, Анна А. Осипова, Татьяна А. Быкова, Олеся В. Паина, Елена И. Дарская, Людмила С. Зубаровская, Сергей Н. Бондаренко, Инна В. Маркова, Борис В. Афанасьев " ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(478) "Елена В. Бабенко, Иван С. Моисеев, Михаил М. Канунников, Александр Л. Алянский, Дмитрий Э. Певцов, Анастасия В. Фролова, Анна А. Осипова, Татьяна А. Быкова, Олеся В. Паина, Елена И. Дарская, Людмила С. Зубаровская, Сергей Н. Бондаренко, Инна В. Маркова, Борис В. Афанасьев " ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(12) "Авторы" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["ORGANIZATION_RU"]=> array(36) { ["ID"]=> string(2) "26" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(22) "Организации" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(15) "ORGANIZATION_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "26" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20218" ["VALUE"]=> array(2) { ["TEXT"]=> string(345) "НИИ детской онкологии, гематологии и трансплантологии им. Р. М. Горбачевой Первого Санкт-Петербургского государственного медицинского университета, Санкт-Петербург, Российская Федерация" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(345) "НИИ детской онкологии, гематологии и трансплантологии им. Р. М. Горбачевой Первого Санкт-Петербургского государственного медицинского университета, Санкт-Петербург, Российская Федерация" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(22) "Организации" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_RU"]=> array(36) { ["ID"]=> string(2) "27" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(29) "Описание/Резюме" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "27" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20219" ["VALUE"]=> array(2) { ["TEXT"]=> string(4474) "<p style="text-align: justify;"> Криоконсервация (Крио) трансплантата является неотъемлемой частью процедуры аутологичной трансплантации гемопоэтических стволовых клеток (ТГСК), тем не менее, в литературе крайне мало данных о безопасности и эффективности аллогенной ТГСК после стадии замораживания. Для определения клинического значения криоконсервации трансплантата было проведено исследование методом парных сравнений между 81 пациентом, получившим инфузию замороженного аллогенного трансплантата, и 81 пациентом, получившим инфузию нативного трансплантата. Критериями парного подбора были вариант и стадия заболевания, тип донора, источник трансплантата, возраст пациента, интенсивность кондиционирования, профилактика реакции «трансплантат против хозяина» (РТПХ) и количество CD34-положительных клеток в трансплантате. В исследуемой группе 83% выполнена неродственная ТГСК, 72% получили инфузию стволовых клеток периферической крови и 40% относились к группе «спасения». При сравнении группы Крио и контрольной группы не было выявлено различий в частоте острой РТПХ II-IV степени (39% vs 37%, p=0,89), средней и тяжелой хронической РТПХ (29% vs 30%, p=0,39), общей выживаемости (37% vs 44%, p=0,24), бессобытийной выживаемости (35% vs 40%, p=0,38) и выживаемости без рецидива и РТПХ (19% vs 25% , p=0,20), соответственно. Тем не менее, трансплантационная летальность (ТЛ) была значимо выше в группе Крио (45% vs 28%, p=0,015), что частично компенсировалось снижением вероятности рецидива (21% vs 34%, p=0,048). Основной причиной повышения ТЛ был тренд к большей частоте первичного неприживления трансплантата (15,7% vs 6.3%, p=0,059) и сепсиса в период аплазии кроветворения (24% vs 13%, p=0,068). Различий в скорости приживления нейтрофилов и тромбоцитов выявлено не было. Частота осложнений трансплантации была сравнима в двух группах, за исключением повышения вероятности развития нефротоксичности II-IV степени в группе криоконсервации (30% vs 10%, p=0,0046). В заключение можно сказать, что исследование показало сравнимые результаты при использовании замороженного и нативного трансплантата. Выявленное повышение частоты первичного неприживления трансплантата, сепсиса и трансплантационной летальности требуют подтверждения в многоцентровых исследованиях. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Трансплантация гемопоэтических стволовых клеток, аллогенная, криоконсервирование трансплантата, замораживание трансплантата, первичное неприживление трансплантата. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(4408) "

Криоконсервация (Крио) трансплантата является неотъемлемой частью процедуры аутологичной трансплантации гемопоэтических стволовых клеток (ТГСК), тем не менее, в литературе крайне мало данных о безопасности и эффективности аллогенной ТГСК после стадии замораживания. Для определения клинического значения криоконсервации трансплантата было проведено исследование методом парных сравнений между 81 пациентом, получившим инфузию замороженного аллогенного трансплантата, и 81 пациентом, получившим инфузию нативного трансплантата. Критериями парного подбора были вариант и стадия заболевания, тип донора, источник трансплантата, возраст пациента, интенсивность кондиционирования, профилактика реакции «трансплантат против хозяина» (РТПХ) и количество CD34-положительных клеток в трансплантате. В исследуемой группе 83% выполнена неродственная ТГСК, 72% получили инфузию стволовых клеток периферической крови и 40% относились к группе «спасения». При сравнении группы Крио и контрольной группы не было выявлено различий в частоте острой РТПХ II-IV степени (39% vs 37%, p=0,89), средней и тяжелой хронической РТПХ (29% vs 30%, p=0,39), общей выживаемости (37% vs 44%, p=0,24), бессобытийной выживаемости (35% vs 40%, p=0,38) и выживаемости без рецидива и РТПХ (19% vs 25% , p=0,20), соответственно. Тем не менее, трансплантационная летальность (ТЛ) была значимо выше в группе Крио (45% vs 28%, p=0,015), что частично компенсировалось снижением вероятности рецидива (21% vs 34%, p=0,048). Основной причиной повышения ТЛ был тренд к большей частоте первичного неприживления трансплантата (15,7% vs 6.3%, p=0,059) и сепсиса в период аплазии кроветворения (24% vs 13%, p=0,068). Различий в скорости приживления нейтрофилов и тромбоцитов выявлено не было. Частота осложнений трансплантации была сравнима в двух группах, за исключением повышения вероятности развития нефротоксичности II-IV степени в группе криоконсервации (30% vs 10%, p=0,0046). В заключение можно сказать, что исследование показало сравнимые результаты при использовании замороженного и нативного трансплантата. Выявленное повышение частоты первичного неприживления трансплантата, сепсиса и трансплантационной летальности требуют подтверждения в многоцентровых исследованиях.

Ключевые слова

Трансплантация гемопоэтических стволовых клеток, аллогенная, криоконсервирование трансплантата, замораживание трансплантата, первичное неприживление трансплантата.

" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(29) "Описание/Резюме" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["DOI"]=> array(36) { ["ID"]=> string(2) "28" ["TIMESTAMP_X"]=> string(19) "2016-04-06 14:11:12" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(3) "DOI" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(3) "DOI" ["DEFAULT_VALUE"]=> string(0) "" ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "80" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "28" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> NULL ["USER_TYPE_SETTINGS"]=> NULL ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20220" ["VALUE"]=> string(37) "10.18620/ctt-1866-8836-2018-7-2-45-53" ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> string(37) "10.18620/ctt-1866-8836-2018-7-2-45-53" ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(3) "DOI" ["~DEFAULT_VALUE"]=> string(0) "" } ["AUTHOR_EN"]=> array(36) { ["ID"]=> string(2) "37" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(6) "Author" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(9) "AUTHOR_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "37" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20221" ["VALUE"]=> array(2) { ["TEXT"]=> string(278) "Elena V. Babenko, Ivan S. Moiseev, Mikhail M. Kanunnikov, Alexandr L. Alyanskiy, Dmitrii E. Pevcov, Anastasia V. Frolova, Anna A. Osipova, Tatyana A. Bykova, Olesya V. Paina, Elena I. Darskaya, Ludmila S. Zubarovskaya, Sergey N. Bondarenko, Inna V. Markova, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(278) "Elena V. Babenko, Ivan S. Moiseev, Mikhail M. Kanunnikov, Alexandr L. Alyanskiy, Dmitrii E. Pevcov, Anastasia V. Frolova, Anna A. Osipova, Tatyana A. Bykova, Olesya V. Paina, Elena I. Darskaya, Ludmila S. Zubarovskaya, Sergey N. Bondarenko, Inna V. Markova, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(6) "Author" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["ORGANIZATION_EN"]=> array(36) { ["ID"]=> string(2) "38" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(12) "Organization" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(15) "ORGANIZATION_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "38" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20222" ["VALUE"]=> array(2) { ["TEXT"]=> string(179) "R. Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, The First St. Petersburg State I. Pavlov Medical University, St. Petersburg, Russia" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(179) "R. Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, The First St. Petersburg State I. Pavlov Medical University, St. Petersburg, Russia" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(12) "Organization" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_EN"]=> array(36) { ["ID"]=> string(2) "39" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(21) "Description / Summary" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "39" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20223" ["VALUE"]=> array(2) { ["TEXT"]=> string(2128) "<p style="text-align: justify;"> Cryopreservation (Cryo) of a graft is a standard procedure in autologous hematopoietic stem cell transplantation (HSCT), however there is a lack of studies on the safety and efficacy of allogeneic HSCT with cryopreserved graft. We have conducted a pair-matched study in 81 patients transplanted with frozen graft and compared them to 81 control patients with fresh cell graft. The groups were matched by age, disease type and stage, conditioning, donor type, graft-versus-host disease (GVHD) prophylaxis and number of CD34-postive cells in the graft. The study group comprised 83% unrelated HSCTs, 72% of peripheral blood stem cell recipients and 40% of salvage patients. No differences were observed between the Cryo and control group in the incidence of grade II-IV acute GVHD (39% vs 37%, p=0.89), moderate and severe chronic GVHD (29% vs 30%, p=0.39), overall survival (37% vs 44%, p=0.24), event-free survival (35% vs 40%, p=0.38) and GVHD-relapse-free survival (19% vs 25% , p=0.20), respectively. However, non-relapse mortality (NRM) was significantly higher in the Cryo group (45% vs 28%, p=0.015), which was compensated by reduced relapse incidence (21% vs 34%, p=0.048). The leading factor for NRM were trends to higher incidence of primary graft failure (15,7% vs 6.3%, p=0.059) and sepsis during aplasia (24% vs 13%, p=0.068). No differences were observed in the time to neutrophil and platelet engraftment. Complications of HSCT were comparable between groups except higher incidence of grade II-IV nephrotoxicity in the Cryo group (30% vs 10%, p=0.0046). In conclusion, the study demonstrated that the results of allogeneic HSCT with cryopreserved graft are comparable to native graft ones. Trends to higher primary graft failure, infectious complications and NRM should be confirmed in the multicenter studies. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Hematopoietic stem cell transplantation, allogeneic, cryopreservation, freezing, primary graft failure. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(2062) "

Cryopreservation (Cryo) of a graft is a standard procedure in autologous hematopoietic stem cell transplantation (HSCT), however there is a lack of studies on the safety and efficacy of allogeneic HSCT with cryopreserved graft. We have conducted a pair-matched study in 81 patients transplanted with frozen graft and compared them to 81 control patients with fresh cell graft. The groups were matched by age, disease type and stage, conditioning, donor type, graft-versus-host disease (GVHD) prophylaxis and number of CD34-postive cells in the graft. The study group comprised 83% unrelated HSCTs, 72% of peripheral blood stem cell recipients and 40% of salvage patients. No differences were observed between the Cryo and control group in the incidence of grade II-IV acute GVHD (39% vs 37%, p=0.89), moderate and severe chronic GVHD (29% vs 30%, p=0.39), overall survival (37% vs 44%, p=0.24), event-free survival (35% vs 40%, p=0.38) and GVHD-relapse-free survival (19% vs 25% , p=0.20), respectively. However, non-relapse mortality (NRM) was significantly higher in the Cryo group (45% vs 28%, p=0.015), which was compensated by reduced relapse incidence (21% vs 34%, p=0.048). The leading factor for NRM were trends to higher incidence of primary graft failure (15,7% vs 6.3%, p=0.059) and sepsis during aplasia (24% vs 13%, p=0.068). No differences were observed in the time to neutrophil and platelet engraftment. Complications of HSCT were comparable between groups except higher incidence of grade II-IV nephrotoxicity in the Cryo group (30% vs 10%, p=0.0046). In conclusion, the study demonstrated that the results of allogeneic HSCT with cryopreserved graft are comparable to native graft ones. Trends to higher primary graft failure, infectious complications and NRM should be confirmed in the multicenter studies.

Keywords

Hematopoietic stem cell transplantation, allogeneic, cryopreservation, freezing, primary graft failure.

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Babenko, Ivan S. Moiseev, Mikhail M. Kanunnikov, Alexandr L. Alyanskiy, Dmitrii E. Pevcov, Anastasia V. Frolova, Anna A. Osipova, Tatyana A. Bykova, Olesya V. Paina, Elena I. Darskaya, Ludmila S. Zubarovskaya, Sergey N. Bondarenko, Inna V. Markova, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(278) "Elena V. Babenko, Ivan S. Moiseev, Mikhail M. Kanunnikov, Alexandr L. Alyanskiy, Dmitrii E. Pevcov, Anastasia V. Frolova, Anna A. Osipova, Tatyana A. Bykova, Olesya V. Paina, Elena I. Darskaya, Ludmila S. Zubarovskaya, Sergey N. Bondarenko, Inna V. Markova, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(6) "Author" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["DISPLAY_VALUE"]=> string(278) "Elena V. Babenko, Ivan S. Moiseev, Mikhail M. 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Afanasyev " } ["SUMMARY_EN"]=> array(37) { ["ID"]=> string(2) "39" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(21) "Description / Summary" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "39" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20223" ["VALUE"]=> array(2) { ["TEXT"]=> string(2128) "<p style="text-align: justify;"> Cryopreservation (Cryo) of a graft is a standard procedure in autologous hematopoietic stem cell transplantation (HSCT), however there is a lack of studies on the safety and efficacy of allogeneic HSCT with cryopreserved graft. We have conducted a pair-matched study in 81 patients transplanted with frozen graft and compared them to 81 control patients with fresh cell graft. The groups were matched by age, disease type and stage, conditioning, donor type, graft-versus-host disease (GVHD) prophylaxis and number of CD34-postive cells in the graft. The study group comprised 83% unrelated HSCTs, 72% of peripheral blood stem cell recipients and 40% of salvage patients. No differences were observed between the Cryo and control group in the incidence of grade II-IV acute GVHD (39% vs 37%, p=0.89), moderate and severe chronic GVHD (29% vs 30%, p=0.39), overall survival (37% vs 44%, p=0.24), event-free survival (35% vs 40%, p=0.38) and GVHD-relapse-free survival (19% vs 25% , p=0.20), respectively. However, non-relapse mortality (NRM) was significantly higher in the Cryo group (45% vs 28%, p=0.015), which was compensated by reduced relapse incidence (21% vs 34%, p=0.048). The leading factor for NRM were trends to higher incidence of primary graft failure (15,7% vs 6.3%, p=0.059) and sepsis during aplasia (24% vs 13%, p=0.068). No differences were observed in the time to neutrophil and platelet engraftment. Complications of HSCT were comparable between groups except higher incidence of grade II-IV nephrotoxicity in the Cryo group (30% vs 10%, p=0.0046). In conclusion, the study demonstrated that the results of allogeneic HSCT with cryopreserved graft are comparable to native graft ones. Trends to higher primary graft failure, infectious complications and NRM should be confirmed in the multicenter studies. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Hematopoietic stem cell transplantation, allogeneic, cryopreservation, freezing, primary graft failure. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(2062) "

Cryopreservation (Cryo) of a graft is a standard procedure in autologous hematopoietic stem cell transplantation (HSCT), however there is a lack of studies on the safety and efficacy of allogeneic HSCT with cryopreserved graft. We have conducted a pair-matched study in 81 patients transplanted with frozen graft and compared them to 81 control patients with fresh cell graft. The groups were matched by age, disease type and stage, conditioning, donor type, graft-versus-host disease (GVHD) prophylaxis and number of CD34-postive cells in the graft. The study group comprised 83% unrelated HSCTs, 72% of peripheral blood stem cell recipients and 40% of salvage patients. No differences were observed between the Cryo and control group in the incidence of grade II-IV acute GVHD (39% vs 37%, p=0.89), moderate and severe chronic GVHD (29% vs 30%, p=0.39), overall survival (37% vs 44%, p=0.24), event-free survival (35% vs 40%, p=0.38) and GVHD-relapse-free survival (19% vs 25% , p=0.20), respectively. However, non-relapse mortality (NRM) was significantly higher in the Cryo group (45% vs 28%, p=0.015), which was compensated by reduced relapse incidence (21% vs 34%, p=0.048). The leading factor for NRM were trends to higher incidence of primary graft failure (15,7% vs 6.3%, p=0.059) and sepsis during aplasia (24% vs 13%, p=0.068). No differences were observed in the time to neutrophil and platelet engraftment. Complications of HSCT were comparable between groups except higher incidence of grade II-IV nephrotoxicity in the Cryo group (30% vs 10%, p=0.0046). In conclusion, the study demonstrated that the results of allogeneic HSCT with cryopreserved graft are comparable to native graft ones. Trends to higher primary graft failure, infectious complications and NRM should be confirmed in the multicenter studies.

Keywords

Hematopoietic stem cell transplantation, allogeneic, cryopreservation, freezing, primary graft failure.

" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(21) "Description / Summary" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["DISPLAY_VALUE"]=> string(2062) "

Cryopreservation (Cryo) of a graft is a standard procedure in autologous hematopoietic stem cell transplantation (HSCT), however there is a lack of studies on the safety and efficacy of allogeneic HSCT with cryopreserved graft. We have conducted a pair-matched study in 81 patients transplanted with frozen graft and compared them to 81 control patients with fresh cell graft. The groups were matched by age, disease type and stage, conditioning, donor type, graft-versus-host disease (GVHD) prophylaxis and number of CD34-postive cells in the graft. The study group comprised 83% unrelated HSCTs, 72% of peripheral blood stem cell recipients and 40% of salvage patients. No differences were observed between the Cryo and control group in the incidence of grade II-IV acute GVHD (39% vs 37%, p=0.89), moderate and severe chronic GVHD (29% vs 30%, p=0.39), overall survival (37% vs 44%, p=0.24), event-free survival (35% vs 40%, p=0.38) and GVHD-relapse-free survival (19% vs 25% , p=0.20), respectively. However, non-relapse mortality (NRM) was significantly higher in the Cryo group (45% vs 28%, p=0.015), which was compensated by reduced relapse incidence (21% vs 34%, p=0.048). The leading factor for NRM were trends to higher incidence of primary graft failure (15,7% vs 6.3%, p=0.059) and sepsis during aplasia (24% vs 13%, p=0.068). No differences were observed in the time to neutrophil and platelet engraftment. Complications of HSCT were comparable between groups except higher incidence of grade II-IV nephrotoxicity in the Cryo group (30% vs 10%, p=0.0046). In conclusion, the study demonstrated that the results of allogeneic HSCT with cryopreserved graft are comparable to native graft ones. Trends to higher primary graft failure, infectious complications and NRM should be confirmed in the multicenter studies.

Keywords

Hematopoietic stem cell transplantation, allogeneic, cryopreservation, freezing, primary graft failure.

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Для определения клинического значения криоконсервации трансплантата было проведено исследование методом парных сравнений между 81 пациентом, получившим инфузию замороженного аллогенного трансплантата, и 81 пациентом, получившим инфузию нативного трансплантата. Критериями парного подбора были вариант и стадия заболевания, тип донора, источник трансплантата, возраст пациента, интенсивность кондиционирования, профилактика реакции «трансплантат против хозяина» (РТПХ) и количество CD34-положительных клеток в трансплантате. В исследуемой группе 83% выполнена неродственная ТГСК, 72% получили инфузию стволовых клеток периферической крови и 40% относились к группе «спасения». При сравнении группы Крио и контрольной группы не было выявлено различий в частоте острой РТПХ II-IV степени (39% vs 37%, p=0,89), средней и тяжелой хронической РТПХ (29% vs 30%, p=0,39), общей выживаемости (37% vs 44%, p=0,24), бессобытийной выживаемости (35% vs 40%, p=0,38) и выживаемости без рецидива и РТПХ (19% vs 25% , p=0,20), соответственно. Тем не менее, трансплантационная летальность (ТЛ) была значимо выше в группе Крио (45% vs 28%, p=0,015), что частично компенсировалось снижением вероятности рецидива (21% vs 34%, p=0,048). Основной причиной повышения ТЛ был тренд к большей частоте первичного неприживления трансплантата (15,7% vs 6.3%, p=0,059) и сепсиса в период аплазии кроветворения (24% vs 13%, p=0,068). Различий в скорости приживления нейтрофилов и тромбоцитов выявлено не было. Частота осложнений трансплантации была сравнима в двух группах, за исключением повышения вероятности развития нефротоксичности II-IV степени в группе криоконсервации (30% vs 10%, p=0,0046). В заключение можно сказать, что исследование показало сравнимые результаты при использовании замороженного и нативного трансплантата. Выявленное повышение частоты первичного неприживления трансплантата, сепсиса и трансплантационной летальности требуют подтверждения в многоцентровых исследованиях. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Трансплантация гемопоэтических стволовых клеток, аллогенная, криоконсервирование трансплантата, замораживание трансплантата, первичное неприживление трансплантата. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(4408) "

Криоконсервация (Крио) трансплантата является неотъемлемой частью процедуры аутологичной трансплантации гемопоэтических стволовых клеток (ТГСК), тем не менее, в литературе крайне мало данных о безопасности и эффективности аллогенной ТГСК после стадии замораживания. Для определения клинического значения криоконсервации трансплантата было проведено исследование методом парных сравнений между 81 пациентом, получившим инфузию замороженного аллогенного трансплантата, и 81 пациентом, получившим инфузию нативного трансплантата. Критериями парного подбора были вариант и стадия заболевания, тип донора, источник трансплантата, возраст пациента, интенсивность кондиционирования, профилактика реакции «трансплантат против хозяина» (РТПХ) и количество CD34-положительных клеток в трансплантате. В исследуемой группе 83% выполнена неродственная ТГСК, 72% получили инфузию стволовых клеток периферической крови и 40% относились к группе «спасения». При сравнении группы Крио и контрольной группы не было выявлено различий в частоте острой РТПХ II-IV степени (39% vs 37%, p=0,89), средней и тяжелой хронической РТПХ (29% vs 30%, p=0,39), общей выживаемости (37% vs 44%, p=0,24), бессобытийной выживаемости (35% vs 40%, p=0,38) и выживаемости без рецидива и РТПХ (19% vs 25% , p=0,20), соответственно. Тем не менее, трансплантационная летальность (ТЛ) была значимо выше в группе Крио (45% vs 28%, p=0,015), что частично компенсировалось снижением вероятности рецидива (21% vs 34%, p=0,048). Основной причиной повышения ТЛ был тренд к большей частоте первичного неприживления трансплантата (15,7% vs 6.3%, p=0,059) и сепсиса в период аплазии кроветворения (24% vs 13%, p=0,068). Различий в скорости приживления нейтрофилов и тромбоцитов выявлено не было. Частота осложнений трансплантации была сравнима в двух группах, за исключением повышения вероятности развития нефротоксичности II-IV степени в группе криоконсервации (30% vs 10%, p=0,0046). В заключение можно сказать, что исследование показало сравнимые результаты при использовании замороженного и нативного трансплантата. Выявленное повышение частоты первичного неприживления трансплантата, сепсиса и трансплантационной летальности требуют подтверждения в многоцентровых исследованиях.

Ключевые слова

Трансплантация гемопоэтических стволовых клеток, аллогенная, криоконсервирование трансплантата, замораживание трансплантата, первичное неприживление трансплантата.

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Криоконсервация (Крио) трансплантата является неотъемлемой частью процедуры аутологичной трансплантации гемопоэтических стволовых клеток (ТГСК), тем не менее, в литературе крайне мало данных о безопасности и эффективности аллогенной ТГСК после стадии замораживания. Для определения клинического значения криоконсервации трансплантата было проведено исследование методом парных сравнений между 81 пациентом, получившим инфузию замороженного аллогенного трансплантата, и 81 пациентом, получившим инфузию нативного трансплантата. Критериями парного подбора были вариант и стадия заболевания, тип донора, источник трансплантата, возраст пациента, интенсивность кондиционирования, профилактика реакции «трансплантат против хозяина» (РТПХ) и количество CD34-положительных клеток в трансплантате. В исследуемой группе 83% выполнена неродственная ТГСК, 72% получили инфузию стволовых клеток периферической крови и 40% относились к группе «спасения». При сравнении группы Крио и контрольной группы не было выявлено различий в частоте острой РТПХ II-IV степени (39% vs 37%, p=0,89), средней и тяжелой хронической РТПХ (29% vs 30%, p=0,39), общей выживаемости (37% vs 44%, p=0,24), бессобытийной выживаемости (35% vs 40%, p=0,38) и выживаемости без рецидива и РТПХ (19% vs 25% , p=0,20), соответственно. Тем не менее, трансплантационная летальность (ТЛ) была значимо выше в группе Крио (45% vs 28%, p=0,015), что частично компенсировалось снижением вероятности рецидива (21% vs 34%, p=0,048). Основной причиной повышения ТЛ был тренд к большей частоте первичного неприживления трансплантата (15,7% vs 6.3%, p=0,059) и сепсиса в период аплазии кроветворения (24% vs 13%, p=0,068). Различий в скорости приживления нейтрофилов и тромбоцитов выявлено не было. Частота осложнений трансплантации была сравнима в двух группах, за исключением повышения вероятности развития нефротоксичности II-IV степени в группе криоконсервации (30% vs 10%, p=0,0046). В заключение можно сказать, что исследование показало сравнимые результаты при использовании замороженного и нативного трансплантата. Выявленное повышение частоты первичного неприживления трансплантата, сепсиса и трансплантационной летальности требуют подтверждения в многоцентровых исследованиях.

Ключевые слова

Трансплантация гемопоэтических стволовых клеток, аллогенная, криоконсервирование трансплантата, замораживание трансплантата, первичное неприживление трансплантата.

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Introduction

Acute myeloid leukemia (AML) is a clinically heterogenous clonal blood malignancy. Stratification of the patients into certain AML risk group is primarily based on the presence or absence of cytogenetic aberrations specific to certain leukemic cell clones [1]. Meanwhile, there are challenging issues for the intermediate-risk AML group, which is defined as a non-homogeneous clinical entity, due to a variety of encountered gene mutations (FLT3, NPM1, CEBPA, etc.) coupled to appropriate differences in clinical course, relapse risk, and adequate treatment choice. Allogeneic transplantation of hematopoietic stem cells (allo-HSCT) was proven to be an optimal approach to AML therapy [2]. However, leukemia relapses develop in 33-78% of AML patients following allo-HSCT, mainly, due to post-treatment persistence of residual leukemic cells in hematopoietic tissues defined as minimal residual disease (MRD). Therefore, a search for new molecular markers able to predict the relapse risk in AML cases, especially those lacking evident cytogenetic abnormalities, represents a high-priority task for clinical molecular oncohematology. In this respect, the BAALC (brain and acute leukemia, cytoplasmic) gene is a useful molecular marker showing enhanced expression in AML malignant cells, being also associated with unfavorable disease prognosis after the induction chemotherapy [3, 4, 5]. In earlier studies, the high BAALC expression level was observed as a single abnormality in AML patients associated with chromosome 8 trisomy [6]. Later on, the BAALC overexpression was shown to be a negative prognostic factor in AML patients with normal karyotype (NK-AML) [7, 8]. The cases of leukemia with primary chemoresistance, high relapse risk and lower overall survival (OS) rates were more common among the patients with BAALC over-expression, if compared to the patient groups with low BAALC expression [7, 9]. BAALC gene is located in the 8q22.3 locus (chromosome 8). In normal hematopoiesis, BAALC expression is limited by a population of early CD34+ progenitor cells, being, however, associated with the most immature blasts in acute leukemia (AL) [7, 8]. The BAALC overexpression frequency is about 40-60%, similarly to other AML expression markers. But, despite such high prevalence, the functional role of BAALC gene product was only recently specified for the leukemia pathogenesis. Morita and co-authors [10] have shown that BAALC overexpression in leukemic cell lines is associated with a cell cycle progression through the ERK-kinase intracellular signaling cascade activation. In addition, more abundant BAALC protein in the cytoplasm interacts with KLF4 transcription factor, thus causing blockage of KLF4 nuclear transport and inhibition of the specific tumor cell suppression. At the same time, a constitutive BAALC expression/ activation in normal hematopoietic stem cells does not influence their proliferative activity [11]. This fact suggests that an additional genetic defect may promote AML in patients with over-expressed BAALC associated with a relapse before allo-HSCT. Ability of BAALC to block myeloid differentiation of hematopoietic stem cells, due to interaction with HoxA9 oncogene, could be one of such tumor-promoting factors [11]. Hence, some recent data point to certain interrelations between the BAALC over-expression and functional changes in malignant AML cells, thus assisting the disease progression. Interestingly, BAALC expression is regulated by the SP1/ NF-κB transcription factor complex. Its pharmacological inhibitor (Bortezomib) reduces the BAALC transcripts abundance in AML cell line KG1α [12]. Suppression of BAALC expression by shRNA in KG1α cells leads to a decrease of the proliferative activity and apoptosis induction [13]. Further studying of the complex genetic abnormalities, associated with intracellular signaling in BAALC-positive AML, may assist both with selection of therapeutic approach, and opens new opportunities in targeted therapy of resistant AML and prevention of post-transplant relapses. The aim of this study was to analyze prognostic significance of BAALC gene over-expression in AML patients during the post-transplant period, in order to estimate feasibility of BAALC expression level monitoring, to predict the relapse risk, and to evaluate sensitivity and specificity of BAALC gene expression assays, as a tool for MRD monitoring.

Patients and Methods

Clinical data

The study included ninety-three AML patients who have undergone 94 allo-HSCTs (one transplantation was repeated) at the R. Gorbacheva Memorial Institute Research Institute of Children Oncology, Hematology and Transplantation (St. Petersburg) from 2010 to 2014. A median follow-up time after HSCT was 7 (0.5 to 52.5) months. The detailed patient characteristics are shown in Table 1. Bone marrow sampling for molecular studies was performed before and after allo- HSCT on 15-720 days posttransplant.

RNA extraction and reverse transcription

RNA was isolated from the fresh bone marrow samples by the guanidine-phenol-chloroform extraction method using the “Ribo-zol-D” kit reagent (InterLabService, Russia), according to the manufacturer’s instructions. Eleven microliters of extracted RNA were used for reverse transcription and cDNA synthesis, being performed with RevertAid First Strand cDNA Synthesis Kit (LifeTechnologies, USA).

Quantitative evaluation of BAALC gene expression

For each cDNA sample, multiplex PCR was performed for BAALC and ABL genes. The reaction conditions were as follows: 10 μl of PCR reaction mixture (“Syntol”, Russia), containing dNTP mix 2.5 mM each, 10xPCR buffer, 5 Units of Taq-DNA polymerase and 2.5μl of 25 mM MgCl2, supplemented with 7 pmol of each gene-specific primers, 5 pmol of Taqman probes for the both BAALC and ABL genes. The primer and TaqMan probe sequences for the quantitative real- time PCR are shown in Table 2. Finally, 5μl of cDNA template, or calibrator for BAALC and ABL (“Inogene”, Russia) were added to the individual tubes, at a total PCR reaction volume of 25μl. Quantitative real-time PCR was performed with a BioRad iQ5 instrument (“BioRad”, USA). The amplification protocol was 95°С for 10 min followed by 50 cycles of heating at 95°С (15 sec), and annealing at 60°С (1 min). The relative BAALC expression levels, or BAALC copy numbers (CN) were determined against the housekeeping reference gene ABL1 to adjust for variations in mRNA quality and different efficiencies of cDNA synthesis. [14]. The gene expression ratio was calculated by the formula CN(BAALC)/CN (ABL)x100%, and the results were expressed in percents.

54-63_Shakirova Table 1-2.png

Statistical methods

Statistical evaluation was performed using descriptive statistics and non-parametric correlation analysis (Spearman rank correlation quotient). In order to reveal the basal BAALC cut-off expression level for MRD monitoring, the analysis of its specificity and sensitivity compared to the reference methods was calculated using ROC-analysis. The prognostic significance of BAALC expression level estimated by plotting of OS, RFS and relapse risk curves, according to Kaplan-Meier. SPSS software version 22.0 (IBM corporation, Armonk, NY, USA) and SAS9 were used for statistical analysis.

Results

Correlation between BAALC expression level and clinical scores

In the present study, we have observed positive correlations between BAALC expression level and the number of blast cells in bone marrow (R=0.417, N=93, p=0.000), and with chimeric transcripts in the favorable cytogenetic risk group (RUNX1-RUNX1T1, PML-RARα and CBFB-MYH11) (R=0.388, N=16, p=0.000). A stronger correlation was revealed between BAALC and chimeric transcript RUNX1-RUNX1T1 expression (R=0.521, N=9, p=0.000). Besides, in three patients, who displays PML-RARα transcript, we observed relative lower BAALC expression profile (BAALC expression level ranged from 0.05% to 12.87% with a median 1.84%). In addition, a negative correlation was revealed for BAALC and donor chimerism level which was determined by analysis of short tandem repeats (R=-0.257, N=93, p=0.0001).

Posttransplant BAALC expression monitoring for the relapse risk estimation

The terms of relapse for the patients included into this study ranged from 24 to 400 (a median of 101) days post-transplant. BAALC expression level in the cases of posttransplant relapse was higher than in non-relapsing patients, except for the early posttransplant period (Fig. 1). The most significant difference was detected at D+60 (p=0.006), D+90 (p=0.022), D+120 (p=0.008), D+150 (p=0.006), and D+270 (p=0.006) after allo-HSCT.
54-63_Shakirova Figure 1.png

Figure 1. Time course and magnitude of BAALC expression reflects a relapse risk in subgroups of AML patients over the posttransplant period. Abscissa: days after HSCT and number of cases at each timepoint. Ordinate: Relative BAALC expression levels, %. Red graph – patients with clinical relapse in posttransplant period. Blue graph – patients without clinical relapse in posttransplant period. * – p<0.05. The grey-shaded space represents 95% confidence intervals


Our data indicate that BAALC expression levels in relapse-free patients did not differ significantly from those in remission state before allo-HSCT (N=69, p=0.308), also being independent on the conditioning regimen (N=69, p=0.199). The median of BAALC expression levels in the patients without post-transplant relapse was 2.6%, with a maximal value of 56.7% (Fig. 2). At early terms after HSCT (D+15 to D+30), the levels of BAALC expression in these patients were comparable to those in remission before HSCT (p=0.515 (N=17) and p=0.212 (N=37), respectively). In this respect, the basal BAALC expression level of 60% was chosen as a common cut-off value in order to assess the BAALC prognostic significance in AML patients over the post-transplant period, because such cut-off reflects a maximal BAALC expression in non-relapsed patients.
54-63_Shakirova Figure 2.png

Figure 2. A variety of BAALC expression levels over posttransplant period in the patients without relapse after allo-HSCT. Asterisks represent extreme values, circles represent outlying values

We have also undertaken a study with individual pre-transplant cut-off values, in order to predict probability of post-transplant remission. The patients with relative BAALC expression level of >0.5% in remission before HSCT were taken into analysis. Appropriate group of 51 patients was studied, including 16 cases of posttransplant relapse. The median BAALC expression level in patients in pre-transplant remission was 3.7, as compared to the patients relapsed after HSCT who exhibited a median pre-transplant value of 120.5 (p=0.0001, according to the Wilcoxon test). In absence of post-transplant relapse, 97.1% of patients did not show an increased BAALC expression by more than 0.5 log10 (fivefold) over the post-transplant period (Fig. 3).

54-63_Shakirova Figure 3.png

Figure 3. Changes of individual BAALC expression level in patients without relapse or in relapse after the allo-HSCT relatively to the period before transplantation. Abscissa: orders of BAALC overexpression (log10)

54-63_Shakirova Figure 4.png

In 88.2% patients with relapse, we observed BAALC expression level of more than for 0.5 log10 above the individual threshold. Moreover, a rise of individual BAALC expression levels by more than one order of magnitude was registered in 80% of post-transplant relapsed patients. Such an increase was not observed in patients with relapse-free post-transplant course. Therefore, BAALC overexpression of >1 log10 has been chosen as an individual cut-off level for studying prognostic significance of BAALC during the post-transplant period in AML patients.

BAALC overexpression: prediction for survivaland relapse risk

In the study group, expression of BAALC above the cut-off level of 60% was observed in 51.9% of relapse cases (14 of 27 patients), whereas individual increases over the cut-off value were registered in 11 relapsed patients of 14 (78.6%). When studying the prognostic significance of BAALC over-expression, we have revealed significant correlations between both individual and common cut-off excess and overall survival, relapse-free survival and relapse risk over a 2-year period after HSCT (Fig. 4). In cases of BAALC overexpression > 60%, both OS and RFS rates were decreased to 7.1% and 0%, respectively, and the relapse risk was 100%. In case of BAALC over-expression above 1 log10 higher than individual cut-offs, the OS and RFS factors were 11.1% and the relapse risk was 88.9%. In particular, BAALC overexpression by >1 log10 over individual cutoff allows assignment of the patients to prognostically unfavorable risk group for high OS, RFS and relapse risk (Fig. 5). Moreover, we have revealed that the pre-relapse increase of individual cutoff values proved to occur sooner than an increased common cut-off value (>60%). For example, BAALC expression by more than 1 log10 over individual basal expression levels was observed in 6 of 14 relapse cases in this group (42.9%) and it developed at 51 days (3-115) prior to clinical relapse. BAALC expression of >60% before the clinical relapse was registered in 2 cases from 21 (9.52%), and in both cases it was developed in 9 days before clinical symptoms of relapse.

Assessing the BAALC cut-off level for reliable MRD monitoring

Minimal residual disease (MRD) is the one of basic reasons of posttransplant relapses in AML. The most sensitive method for MRD detection is the monitoring of the patient-specific cytogenetic aberrations in leukemic cells, resulting in fusion transcripts, or genetic point mutations. However, more than a half of AML patients lack such informative genetic markers [15]. Such patient cohorts represent an ideal group for studying the significance of BAALC overexpression for MRD detection and estimation of relapse risk in post-transplant period.
Our study included assessment of cut-off level for BAALC expression aimed for MRD monitoring in the patients with chimeric transcripts. Appropriate expression levels were based on results of quantitative real-time PCR (N=17). By comparing BAALC expression in molecular remission (MRD=0%) and relapse (MRD>0%) using the receiveroperating characteristic curve (ROC) plotting method, a range of the most sensitive and specific cut-off level values was determined for clinical relapse prediction (Fig. 6A). The area under the curve (AUC) was 0.698. The BAALC expression level at maximal sensitivity and specificity for detection of residual tumor cell was adjusted to 5.2% (sensitivity of 0.495, and specificity of 0.914).

54-63_Shakirova Figure 5.png

Figure 5. Prognostic significance of posttransplant BAALC expression over individual cut-offs for intermediate-risk AML group, as compared to the group of cytogenetic-based unfavorable prognosis (N=54, p=0.000)

Using the generated cut-off value of 5.2% for the entire patient cohort, we have shown that the BAALC expression exceeding such value did not significantly influence the relapse risk (p=0.071), overall (p=0.422) and relapse-free survival (p=0.244) after the HSCT (Fig. 6 B-D). At the same time, the amounts of positive chimeric gene transcripts in favorable-risk patient group (N=17) ranging from 0.002 to 231%, with a median of 0.09%, were observed at the BAALC<5.2% expression level (Fig. 7).

Discussion

Our study aimed for evaluation of prognostic significance for the BAALC overexpression after allo-HSCT, as well as BAALC monitoring for relapse risk estimation after HSCT, and calculation of sensitivity and specificity indexes of MRD testing in AML patients with normal karyotype.
We have found positive correlations between BAALC expression levels and amounts of blast cells in bone marrow samples, and correlations with molecular cytogenetic markers in favorable AML risk group, especially, with chimeric RUNX1-RUNX1T transcript. These data well conform to the previously published analyses [16]. The low correlation quotient may be explained by the fact that BAALC expression is more typical to the least differentiated hematopoietic progenitors and blast cells that express the CD34 surface marker. However, leukemic cells in 20% of AML cases are more differentiated, being CD34-negative, thus exhibiting lower BAALC expression [7, 17, 18]. Stronger correlation of BAALC and RUNX1-RUNX1T1 compared to other translocations in favorable cytogenetic group can be explained by the presence of a G424T polymorphism (rs62527607) in BAALC promoter region which is found in 15% of cases. This nucleotide substitution creates an additional site for high affinity RUNX1 transcription factor binding [19, 20]. The RUNX1 transcription factor and RUNX1-RUNX1T1 chimeric protein have a similar target gene activation profile, due to identical DNA-binding domain structure, thus potentially leading to increased BAALC expression by the RUNX1-RUNX1T1 in cases of 424T allele [21]. Additional experiments are required to confirm this hypothesis.

54-63_Shakirova Figure 6.png

Figure 6. Graph A: estimation of basal BAALC cut-off level for MRD detection by means of ROC-analysis; B, influence of BAALC overexpression (BAALC>5.2%) on the clinical relapse risk in AML patients with normal karyotype (NK-AML) after allo-HSCT; C, influence of BAALC overexpression (BAALC>5.2%) on the 2-year OS values of NK-AML patients; D, influence of BAALC overexpression (BAALC>5.2%) on the 2-year RFS values of NK-AML patients after HSCT

54-63_Shakirova Figure 7.png

Figure 7. Expression range of mRNA fusion transcripts typical to favorable cytogenetic risk group at the BAALC expression levels of <5.2%

A negative correlation between the BAALC expression level and PML-RARα fusion transcript was also discussed previously. BAALC expression level is significantly lower in acute promyelocytic leukemia (APL), exhibiting a specific PMLRARα translocation [22, 23]. A functional role of BAALC gene in APL induction is still open to debates. However, BAALC overexpression allows to distinguish a sub-group with unfavorable disease prognosis within the high-risk APL cohort [23, 24]. According to several studies, BAALC overexpression above both individual and common cut-off levels is recognized as a prognostically significant factor for posttransplant relapse risk estimation, overall survival and relapse-free survival. Interestingly, in the cases of BAALC-positive AML status before HSCT, this marker remained to be informative in 89% of posttransplant relapses (8 from 9 cases). Overexpression of WT1 and PRAME markers in the exceptional BAALC-positive case was observed in the bone marrow sample at the posttransplant relapse. This fact is absolutely consistent with literature data [25], where BAALC gene expression is discussed as an early event in the dominant clone, which remains relatively stable through clonal evolution. We have also used studied individual threshold values of BAALC expression before transplant, in order to predict a risk of clinical relapse after allo-HSCT. A ten-fold increase of individual BAALC expression over the median has been chosen as a cut-off value for results obtained in clinical remission before HSCT. Elevation over general cut-off value of 60% correlated with maximal risk of clinical relapse during the 1st year post-transplant. Increased BAALC expression by one to four log10 (10-10 000 fold) over individual cut-off values suggested a transfer of the patient to unfavorable risk group. A feasibility of the individual BAALC expression monitoring is confirmed by increased expression of BAALC over general cut-off levels in only 51.9% of relapsed patients, whereas individual thresholds were exceeded at earlier terms before relapse, being informative in 78.6% of relapses. Such findings are in accordance with the literature data, where only 53.9% of relapsed patients had BAALC/ABL1 ratio over than 60% [25]. Referring to the scientific publications, monitoring of the BAALC expression may be useful for therapy efficiency estimation in the patients lacking specific genetic markers of tumor cells, and for prediction of molecular and clinical relapse [4, 22, 25, 26]. Applicability of BAALC expression as a MRD marker is based on its sufficient overexpression in relapse if compared to the remission values and its correlation with gene expression of AML markers, such as RUNX1-RUNX1T1, WT1 expression, other markers of normal-karyotype AML (RUNX1, FLT3-ITD, NPM1, CEBPA, MLL-PTD etc.). Our data confirm a significant difference of BAALC expression for the remission and relapse states. However, a more detailed analysis of BAALC as an MRD marker, and its comparison to the reference techniques for MRD monitoring (i.e., qPCR-based detection of chimeric gene transcripts) was performed, showing lower sensitivity of such approach to MRD detection in post-transplant period, at least, for our study group. In the absence of BAALC overexpression (BAALC<5.2%), positive MRD values can be observed, whereas BAALC over-expression (BAALC>5.2%) did not significantly correlate with relapse risk, overall and relapse-free survival. Therefore, quantitative monitoring of BAALC expression could not be recommended as a universal marker of therapy efficiency in the patients with normal-karyotype AML after allo-HSCT, since a specificity of BAALC for CD34+ leukemic blasts is reduced, due to its basal expression in early hematopoietic progenitors [7, 27].

Conclusion

Summarizing our results obtained with a representative group of AML patients, we may recommend the serial quantitative BAALC monitoring for clinical relapse prediction following allogeneic hematopoietic stem cell transplantation. Tracing of BAALC expression levels and individual assignment of cut-off values can be useful not only for stratification of patients into different risk groups, but also for selection of appropriate AML therapy after allo-HSCT.

Conflict of interest

No conflicts of interest are reported.

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19. Eisfeld AK, Marcucci G, Liyanarachchi S, Döhner K, Schwind S, Maharry K, Leffel B, Döhner H, Radmacher MD, Bloomfield CD, Tanner SM,and de la Chapellea A. Heritable polymorphism predisposes to high BAALC expression in acute myeloid leukemia. Proc Natl Acad Sci USA. 2012; 109(17): 6668–6673.
20. Nadimi M, Rahgozar S, Moafi A, Tavassoli M, Mesrian Tanha H. Evaluation of rs62527607 [GT] single nucleotide polymorphism located in BAALC gene in children with acute leukemia using mismatch PCR-RFLP. Cancer Genet. 2016;209(7-8):348-353.
21. Lam K and Zhang DE. RUNX1 and RUNX1-ETO: roles in hematopoiesis and leukemogenesis. Front Biosci. 2012;17:1120–1139.
22. Najima Y, Ohashi K, Kawamura M, Onozuka Y, Yamaguchi T, Akiyama H, Sakamaki H. Molecular monitoring of BAALC expression in patients with CD34-positive acute leukemia. Int J Hematol. 2010;91(4):636-645.
23. Lucena-Araujo AR, Pereira-Martins DA, Koury LS, Franca-Neto PL, Coelho-Silva JL, de Deus Wagatsuma VM, elo RAM, Bittencourt R, Pagnano K, Pasquini R, Chiattone CS, Fagundes EM, Chauffaille ML, Schrier SL, Tallman MS, Ribeiro RC, Grimwade D, Ganser A, Löwenberg B, Lo-Coco F,Sanz MA, Berliner N, Rego EM. Clinical impact of BAALC expression in high-risk acute promyelocytic leukemia. Blood Adv. 2017; 1(21): 1807–1814.
24. Nolte F, Hecht A, Reinwald M, Nowak D, Nowak V, Hanfstein B, Faldum A, Büchner T, Spiekermann K, Sauerland C, Hofmann WK, Lengfelder E. In acute promyelocytic leukemia (APL) low BAALC gene expression identifies a patient group with favorable overall survival and improved relapse free survival. Leuk Res. 2013;37(4):378-382.
25. Weber S, Haferlach T, Alpermann T, Perglerová K, Schnittger S, Haferlach C, Kern W. Feasibility of BAALC gene expression for detection of minimal residual disease and risk stratification in normal karyotype acute myeloid leukaemia. Br J Haematol. 2016;175(5):904-916.
26. Weber S, Alpermann T, Dicker F, Jeromin S, Nadarajah N, Eder C, Fasan A, Kohlmann A, Meggendorfer M,Haferlach C, Kern W, Haferlach T, Schnittger S. BAALC expression: a suitable marker for prognostic risk stratification and detection of residual disease in cytogenetically normal acute myeloid leukemia. Blood Cancer J. 2014; 4(1): e173.
27. Eid MA, Attia M, Abdou S, El-Shazly SF, Elahwal L, Farrag W, Mahmoud L. BAALC and ERG expression in acute myeloid leukemia with normal karyotype: impact on prognosis. Int J Lab Hematol. 2010;32(2):197-205.

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Introduction

Acute myeloid leukemia (AML) is a clinically heterogenous clonal blood malignancy. Stratification of the patients into certain AML risk group is primarily based on the presence or absence of cytogenetic aberrations specific to certain leukemic cell clones [1]. Meanwhile, there are challenging issues for the intermediate-risk AML group, which is defined as a non-homogeneous clinical entity, due to a variety of encountered gene mutations (FLT3, NPM1, CEBPA, etc.) coupled to appropriate differences in clinical course, relapse risk, and adequate treatment choice. Allogeneic transplantation of hematopoietic stem cells (allo-HSCT) was proven to be an optimal approach to AML therapy [2]. However, leukemia relapses develop in 33-78% of AML patients following allo-HSCT, mainly, due to post-treatment persistence of residual leukemic cells in hematopoietic tissues defined as minimal residual disease (MRD). Therefore, a search for new molecular markers able to predict the relapse risk in AML cases, especially those lacking evident cytogenetic abnormalities, represents a high-priority task for clinical molecular oncohematology. In this respect, the BAALC (brain and acute leukemia, cytoplasmic) gene is a useful molecular marker showing enhanced expression in AML malignant cells, being also associated with unfavorable disease prognosis after the induction chemotherapy [3, 4, 5]. In earlier studies, the high BAALC expression level was observed as a single abnormality in AML patients associated with chromosome 8 trisomy [6]. Later on, the BAALC overexpression was shown to be a negative prognostic factor in AML patients with normal karyotype (NK-AML) [7, 8]. The cases of leukemia with primary chemoresistance, high relapse risk and lower overall survival (OS) rates were more common among the patients with BAALC over-expression, if compared to the patient groups with low BAALC expression [7, 9]. BAALC gene is located in the 8q22.3 locus (chromosome 8). In normal hematopoiesis, BAALC expression is limited by a population of early CD34+ progenitor cells, being, however, associated with the most immature blasts in acute leukemia (AL) [7, 8]. The BAALC overexpression frequency is about 40-60%, similarly to other AML expression markers. But, despite such high prevalence, the functional role of BAALC gene product was only recently specified for the leukemia pathogenesis. Morita and co-authors [10] have shown that BAALC overexpression in leukemic cell lines is associated with a cell cycle progression through the ERK-kinase intracellular signaling cascade activation. In addition, more abundant BAALC protein in the cytoplasm interacts with KLF4 transcription factor, thus causing blockage of KLF4 nuclear transport and inhibition of the specific tumor cell suppression. At the same time, a constitutive BAALC expression/ activation in normal hematopoietic stem cells does not influence their proliferative activity [11]. This fact suggests that an additional genetic defect may promote AML in patients with over-expressed BAALC associated with a relapse before allo-HSCT. Ability of BAALC to block myeloid differentiation of hematopoietic stem cells, due to interaction with HoxA9 oncogene, could be one of such tumor-promoting factors [11]. Hence, some recent data point to certain interrelations between the BAALC over-expression and functional changes in malignant AML cells, thus assisting the disease progression. Interestingly, BAALC expression is regulated by the SP1/ NF-κB transcription factor complex. Its pharmacological inhibitor (Bortezomib) reduces the BAALC transcripts abundance in AML cell line KG1α [12]. Suppression of BAALC expression by shRNA in KG1α cells leads to a decrease of the proliferative activity and apoptosis induction [13]. Further studying of the complex genetic abnormalities, associated with intracellular signaling in BAALC-positive AML, may assist both with selection of therapeutic approach, and opens new opportunities in targeted therapy of resistant AML and prevention of post-transplant relapses. The aim of this study was to analyze prognostic significance of BAALC gene over-expression in AML patients during the post-transplant period, in order to estimate feasibility of BAALC expression level monitoring, to predict the relapse risk, and to evaluate sensitivity and specificity of BAALC gene expression assays, as a tool for MRD monitoring.

Patients and Methods

Clinical data

The study included ninety-three AML patients who have undergone 94 allo-HSCTs (one transplantation was repeated) at the R. Gorbacheva Memorial Institute Research Institute of Children Oncology, Hematology and Transplantation (St. Petersburg) from 2010 to 2014. A median follow-up time after HSCT was 7 (0.5 to 52.5) months. The detailed patient characteristics are shown in Table 1. Bone marrow sampling for molecular studies was performed before and after allo- HSCT on 15-720 days posttransplant.

RNA extraction and reverse transcription

RNA was isolated from the fresh bone marrow samples by the guanidine-phenol-chloroform extraction method using the “Ribo-zol-D” kit reagent (InterLabService, Russia), according to the manufacturer’s instructions. Eleven microliters of extracted RNA were used for reverse transcription and cDNA synthesis, being performed with RevertAid First Strand cDNA Synthesis Kit (LifeTechnologies, USA).

Quantitative evaluation of BAALC gene expression

For each cDNA sample, multiplex PCR was performed for BAALC and ABL genes. The reaction conditions were as follows: 10 μl of PCR reaction mixture (“Syntol”, Russia), containing dNTP mix 2.5 mM each, 10xPCR buffer, 5 Units of Taq-DNA polymerase and 2.5μl of 25 mM MgCl2, supplemented with 7 pmol of each gene-specific primers, 5 pmol of Taqman probes for the both BAALC and ABL genes. The primer and TaqMan probe sequences for the quantitative real- time PCR are shown in Table 2. Finally, 5μl of cDNA template, or calibrator for BAALC and ABL (“Inogene”, Russia) were added to the individual tubes, at a total PCR reaction volume of 25μl. Quantitative real-time PCR was performed with a BioRad iQ5 instrument (“BioRad”, USA). The amplification protocol was 95°С for 10 min followed by 50 cycles of heating at 95°С (15 sec), and annealing at 60°С (1 min). The relative BAALC expression levels, or BAALC copy numbers (CN) were determined against the housekeeping reference gene ABL1 to adjust for variations in mRNA quality and different efficiencies of cDNA synthesis. [14]. The gene expression ratio was calculated by the formula CN(BAALC)/CN (ABL)x100%, and the results were expressed in percents.

54-63_Shakirova Table 1-2.png

Statistical methods

Statistical evaluation was performed using descriptive statistics and non-parametric correlation analysis (Spearman rank correlation quotient). In order to reveal the basal BAALC cut-off expression level for MRD monitoring, the analysis of its specificity and sensitivity compared to the reference methods was calculated using ROC-analysis. The prognostic significance of BAALC expression level estimated by plotting of OS, RFS and relapse risk curves, according to Kaplan-Meier. SPSS software version 22.0 (IBM corporation, Armonk, NY, USA) and SAS9 were used for statistical analysis.

Results

Correlation between BAALC expression level and clinical scores

In the present study, we have observed positive correlations between BAALC expression level and the number of blast cells in bone marrow (R=0.417, N=93, p=0.000), and with chimeric transcripts in the favorable cytogenetic risk group (RUNX1-RUNX1T1, PML-RARα and CBFB-MYH11) (R=0.388, N=16, p=0.000). A stronger correlation was revealed between BAALC and chimeric transcript RUNX1-RUNX1T1 expression (R=0.521, N=9, p=0.000). Besides, in three patients, who displays PML-RARα transcript, we observed relative lower BAALC expression profile (BAALC expression level ranged from 0.05% to 12.87% with a median 1.84%). In addition, a negative correlation was revealed for BAALC and donor chimerism level which was determined by analysis of short tandem repeats (R=-0.257, N=93, p=0.0001).

Posttransplant BAALC expression monitoring for the relapse risk estimation

The terms of relapse for the patients included into this study ranged from 24 to 400 (a median of 101) days post-transplant. BAALC expression level in the cases of posttransplant relapse was higher than in non-relapsing patients, except for the early posttransplant period (Fig. 1). The most significant difference was detected at D+60 (p=0.006), D+90 (p=0.022), D+120 (p=0.008), D+150 (p=0.006), and D+270 (p=0.006) after allo-HSCT.
54-63_Shakirova Figure 1.png

Figure 1. Time course and magnitude of BAALC expression reflects a relapse risk in subgroups of AML patients over the posttransplant period. Abscissa: days after HSCT and number of cases at each timepoint. Ordinate: Relative BAALC expression levels, %. Red graph – patients with clinical relapse in posttransplant period. Blue graph – patients without clinical relapse in posttransplant period. * – p<0.05. The grey-shaded space represents 95% confidence intervals


Our data indicate that BAALC expression levels in relapse-free patients did not differ significantly from those in remission state before allo-HSCT (N=69, p=0.308), also being independent on the conditioning regimen (N=69, p=0.199). The median of BAALC expression levels in the patients without post-transplant relapse was 2.6%, with a maximal value of 56.7% (Fig. 2). At early terms after HSCT (D+15 to D+30), the levels of BAALC expression in these patients were comparable to those in remission before HSCT (p=0.515 (N=17) and p=0.212 (N=37), respectively). In this respect, the basal BAALC expression level of 60% was chosen as a common cut-off value in order to assess the BAALC prognostic significance in AML patients over the post-transplant period, because such cut-off reflects a maximal BAALC expression in non-relapsed patients.
54-63_Shakirova Figure 2.png

Figure 2. A variety of BAALC expression levels over posttransplant period in the patients without relapse after allo-HSCT. Asterisks represent extreme values, circles represent outlying values

We have also undertaken a study with individual pre-transplant cut-off values, in order to predict probability of post-transplant remission. The patients with relative BAALC expression level of >0.5% in remission before HSCT were taken into analysis. Appropriate group of 51 patients was studied, including 16 cases of posttransplant relapse. The median BAALC expression level in patients in pre-transplant remission was 3.7, as compared to the patients relapsed after HSCT who exhibited a median pre-transplant value of 120.5 (p=0.0001, according to the Wilcoxon test). In absence of post-transplant relapse, 97.1% of patients did not show an increased BAALC expression by more than 0.5 log10 (fivefold) over the post-transplant period (Fig. 3).

54-63_Shakirova Figure 3.png

Figure 3. Changes of individual BAALC expression level in patients without relapse or in relapse after the allo-HSCT relatively to the period before transplantation. Abscissa: orders of BAALC overexpression (log10)

54-63_Shakirova Figure 4.png

In 88.2% patients with relapse, we observed BAALC expression level of more than for 0.5 log10 above the individual threshold. Moreover, a rise of individual BAALC expression levels by more than one order of magnitude was registered in 80% of post-transplant relapsed patients. Such an increase was not observed in patients with relapse-free post-transplant course. Therefore, BAALC overexpression of >1 log10 has been chosen as an individual cut-off level for studying prognostic significance of BAALC during the post-transplant period in AML patients.

BAALC overexpression: prediction for survivaland relapse risk

In the study group, expression of BAALC above the cut-off level of 60% was observed in 51.9% of relapse cases (14 of 27 patients), whereas individual increases over the cut-off value were registered in 11 relapsed patients of 14 (78.6%). When studying the prognostic significance of BAALC over-expression, we have revealed significant correlations between both individual and common cut-off excess and overall survival, relapse-free survival and relapse risk over a 2-year period after HSCT (Fig. 4). In cases of BAALC overexpression > 60%, both OS and RFS rates were decreased to 7.1% and 0%, respectively, and the relapse risk was 100%. In case of BAALC over-expression above 1 log10 higher than individual cut-offs, the OS and RFS factors were 11.1% and the relapse risk was 88.9%. In particular, BAALC overexpression by >1 log10 over individual cutoff allows assignment of the patients to prognostically unfavorable risk group for high OS, RFS and relapse risk (Fig. 5). Moreover, we have revealed that the pre-relapse increase of individual cutoff values proved to occur sooner than an increased common cut-off value (>60%). For example, BAALC expression by more than 1 log10 over individual basal expression levels was observed in 6 of 14 relapse cases in this group (42.9%) and it developed at 51 days (3-115) prior to clinical relapse. BAALC expression of >60% before the clinical relapse was registered in 2 cases from 21 (9.52%), and in both cases it was developed in 9 days before clinical symptoms of relapse.

Assessing the BAALC cut-off level for reliable MRD monitoring

Minimal residual disease (MRD) is the one of basic reasons of posttransplant relapses in AML. The most sensitive method for MRD detection is the monitoring of the patient-specific cytogenetic aberrations in leukemic cells, resulting in fusion transcripts, or genetic point mutations. However, more than a half of AML patients lack such informative genetic markers [15]. Such patient cohorts represent an ideal group for studying the significance of BAALC overexpression for MRD detection and estimation of relapse risk in post-transplant period.
Our study included assessment of cut-off level for BAALC expression aimed for MRD monitoring in the patients with chimeric transcripts. Appropriate expression levels were based on results of quantitative real-time PCR (N=17). By comparing BAALC expression in molecular remission (MRD=0%) and relapse (MRD>0%) using the receiveroperating characteristic curve (ROC) plotting method, a range of the most sensitive and specific cut-off level values was determined for clinical relapse prediction (Fig. 6A). The area under the curve (AUC) was 0.698. The BAALC expression level at maximal sensitivity and specificity for detection of residual tumor cell was adjusted to 5.2% (sensitivity of 0.495, and specificity of 0.914).

54-63_Shakirova Figure 5.png

Figure 5. Prognostic significance of posttransplant BAALC expression over individual cut-offs for intermediate-risk AML group, as compared to the group of cytogenetic-based unfavorable prognosis (N=54, p=0.000)

Using the generated cut-off value of 5.2% for the entire patient cohort, we have shown that the BAALC expression exceeding such value did not significantly influence the relapse risk (p=0.071), overall (p=0.422) and relapse-free survival (p=0.244) after the HSCT (Fig. 6 B-D). At the same time, the amounts of positive chimeric gene transcripts in favorable-risk patient group (N=17) ranging from 0.002 to 231%, with a median of 0.09%, were observed at the BAALC<5.2% expression level (Fig. 7).

Discussion

Our study aimed for evaluation of prognostic significance for the BAALC overexpression after allo-HSCT, as well as BAALC monitoring for relapse risk estimation after HSCT, and calculation of sensitivity and specificity indexes of MRD testing in AML patients with normal karyotype.
We have found positive correlations between BAALC expression levels and amounts of blast cells in bone marrow samples, and correlations with molecular cytogenetic markers in favorable AML risk group, especially, with chimeric RUNX1-RUNX1T transcript. These data well conform to the previously published analyses [16]. The low correlation quotient may be explained by the fact that BAALC expression is more typical to the least differentiated hematopoietic progenitors and blast cells that express the CD34 surface marker. However, leukemic cells in 20% of AML cases are more differentiated, being CD34-negative, thus exhibiting lower BAALC expression [7, 17, 18]. Stronger correlation of BAALC and RUNX1-RUNX1T1 compared to other translocations in favorable cytogenetic group can be explained by the presence of a G424T polymorphism (rs62527607) in BAALC promoter region which is found in 15% of cases. This nucleotide substitution creates an additional site for high affinity RUNX1 transcription factor binding [19, 20]. The RUNX1 transcription factor and RUNX1-RUNX1T1 chimeric protein have a similar target gene activation profile, due to identical DNA-binding domain structure, thus potentially leading to increased BAALC expression by the RUNX1-RUNX1T1 in cases of 424T allele [21]. Additional experiments are required to confirm this hypothesis.

54-63_Shakirova Figure 6.png

Figure 6. Graph A: estimation of basal BAALC cut-off level for MRD detection by means of ROC-analysis; B, influence of BAALC overexpression (BAALC>5.2%) on the clinical relapse risk in AML patients with normal karyotype (NK-AML) after allo-HSCT; C, influence of BAALC overexpression (BAALC>5.2%) on the 2-year OS values of NK-AML patients; D, influence of BAALC overexpression (BAALC>5.2%) on the 2-year RFS values of NK-AML patients after HSCT

54-63_Shakirova Figure 7.png

Figure 7. Expression range of mRNA fusion transcripts typical to favorable cytogenetic risk group at the BAALC expression levels of <5.2%

A negative correlation between the BAALC expression level and PML-RARα fusion transcript was also discussed previously. BAALC expression level is significantly lower in acute promyelocytic leukemia (APL), exhibiting a specific PMLRARα translocation [22, 23]. A functional role of BAALC gene in APL induction is still open to debates. However, BAALC overexpression allows to distinguish a sub-group with unfavorable disease prognosis within the high-risk APL cohort [23, 24]. According to several studies, BAALC overexpression above both individual and common cut-off levels is recognized as a prognostically significant factor for posttransplant relapse risk estimation, overall survival and relapse-free survival. Interestingly, in the cases of BAALC-positive AML status before HSCT, this marker remained to be informative in 89% of posttransplant relapses (8 from 9 cases). Overexpression of WT1 and PRAME markers in the exceptional BAALC-positive case was observed in the bone marrow sample at the posttransplant relapse. This fact is absolutely consistent with literature data [25], where BAALC gene expression is discussed as an early event in the dominant clone, which remains relatively stable through clonal evolution. We have also used studied individual threshold values of BAALC expression before transplant, in order to predict a risk of clinical relapse after allo-HSCT. A ten-fold increase of individual BAALC expression over the median has been chosen as a cut-off value for results obtained in clinical remission before HSCT. Elevation over general cut-off value of 60% correlated with maximal risk of clinical relapse during the 1st year post-transplant. Increased BAALC expression by one to four log10 (10-10 000 fold) over individual cut-off values suggested a transfer of the patient to unfavorable risk group. A feasibility of the individual BAALC expression monitoring is confirmed by increased expression of BAALC over general cut-off levels in only 51.9% of relapsed patients, whereas individual thresholds were exceeded at earlier terms before relapse, being informative in 78.6% of relapses. Such findings are in accordance with the literature data, where only 53.9% of relapsed patients had BAALC/ABL1 ratio over than 60% [25]. Referring to the scientific publications, monitoring of the BAALC expression may be useful for therapy efficiency estimation in the patients lacking specific genetic markers of tumor cells, and for prediction of molecular and clinical relapse [4, 22, 25, 26]. Applicability of BAALC expression as a MRD marker is based on its sufficient overexpression in relapse if compared to the remission values and its correlation with gene expression of AML markers, such as RUNX1-RUNX1T1, WT1 expression, other markers of normal-karyotype AML (RUNX1, FLT3-ITD, NPM1, CEBPA, MLL-PTD etc.). Our data confirm a significant difference of BAALC expression for the remission and relapse states. However, a more detailed analysis of BAALC as an MRD marker, and its comparison to the reference techniques for MRD monitoring (i.e., qPCR-based detection of chimeric gene transcripts) was performed, showing lower sensitivity of such approach to MRD detection in post-transplant period, at least, for our study group. In the absence of BAALC overexpression (BAALC<5.2%), positive MRD values can be observed, whereas BAALC over-expression (BAALC>5.2%) did not significantly correlate with relapse risk, overall and relapse-free survival. Therefore, quantitative monitoring of BAALC expression could not be recommended as a universal marker of therapy efficiency in the patients with normal-karyotype AML after allo-HSCT, since a specificity of BAALC for CD34+ leukemic blasts is reduced, due to its basal expression in early hematopoietic progenitors [7, 27].

Conclusion

Summarizing our results obtained with a representative group of AML patients, we may recommend the serial quantitative BAALC monitoring for clinical relapse prediction following allogeneic hematopoietic stem cell transplantation. Tracing of BAALC expression levels and individual assignment of cut-off values can be useful not only for stratification of patients into different risk groups, but also for selection of appropriate AML therapy after allo-HSCT.

Conflict of interest

No conflicts of interest are reported.

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24. Nolte F, Hecht A, Reinwald M, Nowak D, Nowak V, Hanfstein B, Faldum A, Büchner T, Spiekermann K, Sauerland C, Hofmann WK, Lengfelder E. In acute promyelocytic leukemia (APL) low BAALC gene expression identifies a patient group with favorable overall survival and improved relapse free survival. Leuk Res. 2013;37(4):378-382.
25. Weber S, Haferlach T, Alpermann T, Perglerová K, Schnittger S, Haferlach C, Kern W. Feasibility of BAALC gene expression for detection of minimal residual disease and risk stratification in normal karyotype acute myeloid leukaemia. Br J Haematol. 2016;175(5):904-916.
26. Weber S, Alpermann T, Dicker F, Jeromin S, Nadarajah N, Eder C, Fasan A, Kohlmann A, Meggendorfer M,Haferlach C, Kern W, Haferlach T, Schnittger S. BAALC expression: a suitable marker for prognostic risk stratification and detection of residual disease in cytogenetically normal acute myeloid leukemia. Blood Cancer J. 2014; 4(1): e173.
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Для пациентов с ОМЛ промежуточной цитогенетической группы риска, которая является гетерогенной по мутационному статусу целого ряда генов (FLT3, NPM1, CEBPA и т.д.), прогнозирование течения заболевания, оценка риска развития рецидива и выбор оптимальной терапии затруднены. В связи с этим поиск новых молекулярных маркеров, имеющих большое прогностическое значение, а так же полезных в аспекте оценки риска развития рецидива у пациентов с ОМЛ, лишенных крупных цитогенетических аномалий, является одной из приоритетных задач молекулярной онкогематологии. Для оценки применимости мониторинга уровня экспрессии гена BAALC (Brain And Acute Leukemia, Cytoplasmic) для предикции развития рецидива, оценки чувствительности и специфичности метода мониторинга BAALC с целью оценки эффективности терапии, мы проанализировали прогностическое значение гиперэкспрессии гена BAALC у 93 пациентов с ОМЛ в посттрансплантационном периоде. В свежих образцах костного мозга пациентов методом количественной ПЦР в режиме реального времени определялся уровень экспрессии гена BAALC. Пациенты были подразделены на группы низкой и высокой экспрессии BAALC на основании общего и индивидуального пороговых уровней экспрессии. Мы заключили, что гиперэкспрессия BAALC выше индивидуального и общего порогового уровней является прогностически значимым фактором для оценки риска развития рецидива в посттрансплантационном периоде, общей и безрецидивной выживаемости. Однако более детальный анализ BAALC как маркера эффективности терапии и его сравнение с референтными методами мониторинга минимальной остаточной болезни (такими как детекция химерных транскриптов генов методом количественной ПЦР в режиме реального времени) показал более низкую чувствительность такого подхода к мониторингу МОБ в посттрансплантационном периоде, по меньшей мере на примере исследуемой выборки пациентов. 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Шакирова, Ильдар М. Бархатов, Анна И. Чуркина, Иван С. Моисеев, Татьяна Л. Гиндина, Сергей Н. Бондаренко, Борис В. Афанасьев " ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(235) "Алена И. Шакирова, Ильдар М. Бархатов, Анна И. Чуркина, Иван С. Моисеев, Татьяна Л. Гиндина, Сергей Н. Бондаренко, Борис В. Афанасьев " ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(12) "Авторы" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["ORGANIZATION_RU"]=> array(36) { ["ID"]=> string(2) "26" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(22) "Организации" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(15) "ORGANIZATION_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "26" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20228" ["VALUE"]=> array(2) { ["TEXT"]=> string(477) "НИИ детской онкологии, гематологии и трансплантологии им. Р. Горбачевой, кафедра гематологии, трансфузиологии и трансплантологии Первого Санкт-Петербургского государственного медицинского университета им. И. П. Павлова, Санкт-Петербург, Российская Федерация" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(477) "НИИ детской онкологии, гематологии и трансплантологии им. Р. Горбачевой, кафедра гематологии, трансфузиологии и трансплантологии Первого Санкт-Петербургского государственного медицинского университета им. И. П. Павлова, Санкт-Петербург, Российская Федерация" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(22) "Организации" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_RU"]=> array(36) { ["ID"]=> string(2) "27" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(29) "Описание/Резюме" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "27" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20229" ["VALUE"]=> array(2) { ["TEXT"]=> string(4431) "<h2></h2> <h2 style="text-align: justify;">Резюме</h2> <p style="text-align: justify;"> Острый миелоидный лейкоз (ОМЛ) представляет собой гетерогенное клональное заболевание крови опухолевой природы. Для пациентов с ОМЛ промежуточной цитогенетической группы риска, которая является гетерогенной по мутационному статусу целого ряда генов (FLT3, NPM1, CEBPA и т.д.), прогнозирование течения заболевания, оценка риска развития рецидива и выбор оптимальной терапии затруднены. В связи с этим поиск новых молекулярных маркеров, имеющих большое прогностическое значение, а так же полезных в аспекте оценки риска развития рецидива у пациентов с ОМЛ, лишенных крупных цитогенетических аномалий, является одной из приоритетных задач молекулярной онкогематологии. Для оценки применимости мониторинга уровня экспрессии гена BAALC (Brain And Acute Leukemia, Cytoplasmic) для предикции развития рецидива, оценки чувствительности и специфичности метода мониторинга BAALC с целью оценки эффективности терапии, мы проанализировали прогностическое значение гиперэкспрессии гена BAALC у 93 пациентов с ОМЛ в посттрансплантационном периоде. В свежих образцах костного мозга пациентов методом количественной ПЦР в режиме реального времени определялся уровень экспрессии гена BAALC. Пациенты были подразделены на группы низкой и высокой экспрессии BAALC на основании общего и индивидуального пороговых уровней экспрессии. Мы заключили, что гиперэкспрессия BAALC выше индивидуального и общего порогового уровней является прогностически значимым фактором для оценки риска развития рецидива в посттрансплантационном периоде, общей и безрецидивной выживаемости. Однако более детальный анализ BAALC как маркера эффективности терапии и его сравнение с референтными методами мониторинга минимальной остаточной болезни (такими как детекция химерных транскриптов генов методом количественной ПЦР в режиме реального времени) показал более низкую чувствительность такого подхода к мониторингу МОБ в посттрансплантационном периоде, по меньшей мере на примере исследуемой выборки пациентов. Частый мониторинг уровня экспрессии гена BAALC может быть рекомендован для предикции развития клинико-гематологического рецидива в ходе посттрансплантационного периода у пациентов с ОМЛ. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Острый миелобластный лейкоз, BAALC, экспрессия гена, клинический прогноз, минимальная остаточная болезнь. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(4331) "

Резюме

Острый миелоидный лейкоз (ОМЛ) представляет собой гетерогенное клональное заболевание крови опухолевой природы. Для пациентов с ОМЛ промежуточной цитогенетической группы риска, которая является гетерогенной по мутационному статусу целого ряда генов (FLT3, NPM1, CEBPA и т.д.), прогнозирование течения заболевания, оценка риска развития рецидива и выбор оптимальной терапии затруднены. В связи с этим поиск новых молекулярных маркеров, имеющих большое прогностическое значение, а так же полезных в аспекте оценки риска развития рецидива у пациентов с ОМЛ, лишенных крупных цитогенетических аномалий, является одной из приоритетных задач молекулярной онкогематологии. Для оценки применимости мониторинга уровня экспрессии гена BAALC (Brain And Acute Leukemia, Cytoplasmic) для предикции развития рецидива, оценки чувствительности и специфичности метода мониторинга BAALC с целью оценки эффективности терапии, мы проанализировали прогностическое значение гиперэкспрессии гена BAALC у 93 пациентов с ОМЛ в посттрансплантационном периоде. В свежих образцах костного мозга пациентов методом количественной ПЦР в режиме реального времени определялся уровень экспрессии гена BAALC. Пациенты были подразделены на группы низкой и высокой экспрессии BAALC на основании общего и индивидуального пороговых уровней экспрессии. Мы заключили, что гиперэкспрессия BAALC выше индивидуального и общего порогового уровней является прогностически значимым фактором для оценки риска развития рецидива в посттрансплантационном периоде, общей и безрецидивной выживаемости. Однако более детальный анализ BAALC как маркера эффективности терапии и его сравнение с референтными методами мониторинга минимальной остаточной болезни (такими как детекция химерных транскриптов генов методом количественной ПЦР в режиме реального времени) показал более низкую чувствительность такого подхода к мониторингу МОБ в посттрансплантационном периоде, по меньшей мере на примере исследуемой выборки пациентов. Частый мониторинг уровня экспрессии гена BAALC может быть рекомендован для предикции развития клинико-гематологического рецидива в ходе посттрансплантационного периода у пациентов с ОМЛ.

Ключевые слова

Острый миелобластный лейкоз, BAALC, экспрессия гена, клинический прогноз, минимальная остаточная болезнь.

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Shakirova, Ildar M. Barkhatov, Anna I. Churkina, Ivan S. Moiseev, Tatiana L. Gindina, Sergey N. Bondarenko, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(137) "Alena I. Shakirova, Ildar M. Barkhatov, Anna I. Churkina, Ivan S. Moiseev, Tatiana L. Gindina, Sergey N. Bondarenko, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(6) "Author" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["ORGANIZATION_EN"]=> array(36) { ["ID"]=> string(2) "38" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(12) "Organization" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(15) "ORGANIZATION_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "38" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20232" ["VALUE"]=> array(2) { ["TEXT"]=> string(170) "R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, The First St. Petersburg State I. Pavlov Medical University, St. Petersburg, Russia" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(170) "R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, The First St. Petersburg State I. Pavlov Medical University, St. Petersburg, Russia" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(12) "Organization" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_EN"]=> array(36) { ["ID"]=> string(2) "39" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(21) "Description / Summary" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "39" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20233" ["VALUE"]=> array(2) { ["TEXT"]=> string(2316) "<h2 style="text-align: justify;">Summary</h2> <p style="text-align: justify;"> Acute myeloid leukemia (AML) is a heterogenous clonal blood disease of a neoplastic origin. There are challenging issues for the intermediate-risk AML group, which is defined as non-homogeneous due to a variety of gene mutations (FLT3, NPM1, CEBPA, etc.), prediction of differential clinical course, relapse risk, and selection of adequate therapy. In this context, a search for new molecular markers with sufficient prognostic value for the relapse risk estimation in AML cases with no detectable cytogenetic abnormalities represents a high-priority task for clinical molecular oncohematology. We analyzed prognostic significance of BAALC (Brain And Acute Leukemia, Cytoplasmic) gene overexpression in 93 AML patients during the posttransplant period, in order to estimate feasibility of BAALC expression level monitoring, to predict the relapse risk, and to evaluate sensitivity and specificity of BAALC gene expression assay, to the purpose of minimal residual disease (MRD) monitoring. BAALC expression was determined by quantitative real-time polymerase chain reaction in fresh bone marrow samples. Patients were dichotomized at BAALC's individual and general cut-off into low and high expressers. We have concluded that BAALC overexpression above both individual and common cut-off levels is recognized as a prognostically significant factor for posttransplant relapse risk estimation, overall survival and relapse-free survival. A more detailed analysis of BAALC as a marker for estimation of therapeutic efficiency was performed. We have also compared its sensitivity to the reference techniques for minimal residual disease monitoring (i.e., qPCR-based detection of chimeric gene transcripts), showing inferior sensitivity of such approach to MRD detection in post-transplant period, at least, for our study group. Serial BAALC monitoring may be recommended for clinical relapse prediction during the post-transplant period in AML patients. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Acute myeloblastic leukemia, BAALC, gene expression, clinical prognosis, minimal residual disease. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(2228) "

Summary

Acute myeloid leukemia (AML) is a heterogenous clonal blood disease of a neoplastic origin. There are challenging issues for the intermediate-risk AML group, which is defined as non-homogeneous due to a variety of gene mutations (FLT3, NPM1, CEBPA, etc.), prediction of differential clinical course, relapse risk, and selection of adequate therapy. In this context, a search for new molecular markers with sufficient prognostic value for the relapse risk estimation in AML cases with no detectable cytogenetic abnormalities represents a high-priority task for clinical molecular oncohematology. We analyzed prognostic significance of BAALC (Brain And Acute Leukemia, Cytoplasmic) gene overexpression in 93 AML patients during the posttransplant period, in order to estimate feasibility of BAALC expression level monitoring, to predict the relapse risk, and to evaluate sensitivity and specificity of BAALC gene expression assay, to the purpose of minimal residual disease (MRD) monitoring. BAALC expression was determined by quantitative real-time polymerase chain reaction in fresh bone marrow samples. Patients were dichotomized at BAALC's individual and general cut-off into low and high expressers. We have concluded that BAALC overexpression above both individual and common cut-off levels is recognized as a prognostically significant factor for posttransplant relapse risk estimation, overall survival and relapse-free survival. A more detailed analysis of BAALC as a marker for estimation of therapeutic efficiency was performed. We have also compared its sensitivity to the reference techniques for minimal residual disease monitoring (i.e., qPCR-based detection of chimeric gene transcripts), showing inferior sensitivity of such approach to MRD detection in post-transplant period, at least, for our study group. Serial BAALC monitoring may be recommended for clinical relapse prediction during the post-transplant period in AML patients.

Keywords

Acute myeloblastic leukemia, BAALC, gene expression, clinical prognosis, minimal residual disease.

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There are challenging issues for the intermediate-risk AML group, which is defined as non-homogeneous due to a variety of gene mutations (FLT3, NPM1, CEBPA, etc.), prediction of differential clinical course, relapse risk, and selection of adequate therapy. In this context, a search for new molecular markers with sufficient prognostic value for the relapse risk estimation in AML cases with no detectable cytogenetic abnormalities represents a high-priority task for clinical molecular oncohematology. We analyzed prognostic significance of BAALC (Brain And Acute Leukemia, Cytoplasmic) gene overexpression in 93 AML patients during the posttransplant period, in order to estimate feasibility of BAALC expression level monitoring, to predict the relapse risk, and to evaluate sensitivity and specificity of BAALC gene expression assay, to the purpose of minimal residual disease (MRD) monitoring. BAALC expression was determined by quantitative real-time polymerase chain reaction in fresh bone marrow samples. Patients were dichotomized at BAALC's individual and general cut-off into low and high expressers. We have concluded that BAALC overexpression above both individual and common cut-off levels is recognized as a prognostically significant factor for posttransplant relapse risk estimation, overall survival and relapse-free survival. A more detailed analysis of BAALC as a marker for estimation of therapeutic efficiency was performed. We have also compared its sensitivity to the reference techniques for minimal residual disease monitoring (i.e., qPCR-based detection of chimeric gene transcripts), showing inferior sensitivity of such approach to MRD detection in post-transplant period, at least, for our study group. Serial BAALC monitoring may be recommended for clinical relapse prediction during the post-transplant period in AML patients. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Acute myeloblastic leukemia, BAALC, gene expression, clinical prognosis, minimal residual disease. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(2228) "

Summary

Acute myeloid leukemia (AML) is a heterogenous clonal blood disease of a neoplastic origin. There are challenging issues for the intermediate-risk AML group, which is defined as non-homogeneous due to a variety of gene mutations (FLT3, NPM1, CEBPA, etc.), prediction of differential clinical course, relapse risk, and selection of adequate therapy. In this context, a search for new molecular markers with sufficient prognostic value for the relapse risk estimation in AML cases with no detectable cytogenetic abnormalities represents a high-priority task for clinical molecular oncohematology. We analyzed prognostic significance of BAALC (Brain And Acute Leukemia, Cytoplasmic) gene overexpression in 93 AML patients during the posttransplant period, in order to estimate feasibility of BAALC expression level monitoring, to predict the relapse risk, and to evaluate sensitivity and specificity of BAALC gene expression assay, to the purpose of minimal residual disease (MRD) monitoring. BAALC expression was determined by quantitative real-time polymerase chain reaction in fresh bone marrow samples. Patients were dichotomized at BAALC's individual and general cut-off into low and high expressers. We have concluded that BAALC overexpression above both individual and common cut-off levels is recognized as a prognostically significant factor for posttransplant relapse risk estimation, overall survival and relapse-free survival. A more detailed analysis of BAALC as a marker for estimation of therapeutic efficiency was performed. We have also compared its sensitivity to the reference techniques for minimal residual disease monitoring (i.e., qPCR-based detection of chimeric gene transcripts), showing inferior sensitivity of such approach to MRD detection in post-transplant period, at least, for our study group. Serial BAALC monitoring may be recommended for clinical relapse prediction during the post-transplant period in AML patients.

Keywords

Acute myeloblastic leukemia, BAALC, gene expression, clinical prognosis, minimal residual disease.

" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(21) "Description / Summary" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["DISPLAY_VALUE"]=> string(2228) "

Summary

Acute myeloid leukemia (AML) is a heterogenous clonal blood disease of a neoplastic origin. There are challenging issues for the intermediate-risk AML group, which is defined as non-homogeneous due to a variety of gene mutations (FLT3, NPM1, CEBPA, etc.), prediction of differential clinical course, relapse risk, and selection of adequate therapy. In this context, a search for new molecular markers with sufficient prognostic value for the relapse risk estimation in AML cases with no detectable cytogenetic abnormalities represents a high-priority task for clinical molecular oncohematology. We analyzed prognostic significance of BAALC (Brain And Acute Leukemia, Cytoplasmic) gene overexpression in 93 AML patients during the posttransplant period, in order to estimate feasibility of BAALC expression level monitoring, to predict the relapse risk, and to evaluate sensitivity and specificity of BAALC gene expression assay, to the purpose of minimal residual disease (MRD) monitoring. BAALC expression was determined by quantitative real-time polymerase chain reaction in fresh bone marrow samples. Patients were dichotomized at BAALC's individual and general cut-off into low and high expressers. We have concluded that BAALC overexpression above both individual and common cut-off levels is recognized as a prognostically significant factor for posttransplant relapse risk estimation, overall survival and relapse-free survival. A more detailed analysis of BAALC as a marker for estimation of therapeutic efficiency was performed. We have also compared its sensitivity to the reference techniques for minimal residual disease monitoring (i.e., qPCR-based detection of chimeric gene transcripts), showing inferior sensitivity of such approach to MRD detection in post-transplant period, at least, for our study group. Serial BAALC monitoring may be recommended for clinical relapse prediction during the post-transplant period in AML patients.

Keywords

Acute myeloblastic leukemia, BAALC, gene expression, clinical prognosis, minimal residual disease.

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Афанасьев " } ["SUMMARY_RU"]=> array(37) { ["ID"]=> string(2) "27" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(29) "Описание/Резюме" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "27" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20229" ["VALUE"]=> array(2) { ["TEXT"]=> string(4431) "<h2></h2> <h2 style="text-align: justify;">Резюме</h2> <p style="text-align: justify;"> Острый миелоидный лейкоз (ОМЛ) представляет собой гетерогенное клональное заболевание крови опухолевой природы. Для пациентов с ОМЛ промежуточной цитогенетической группы риска, которая является гетерогенной по мутационному статусу целого ряда генов (FLT3, NPM1, CEBPA и т.д.), прогнозирование течения заболевания, оценка риска развития рецидива и выбор оптимальной терапии затруднены. В связи с этим поиск новых молекулярных маркеров, имеющих большое прогностическое значение, а так же полезных в аспекте оценки риска развития рецидива у пациентов с ОМЛ, лишенных крупных цитогенетических аномалий, является одной из приоритетных задач молекулярной онкогематологии. Для оценки применимости мониторинга уровня экспрессии гена BAALC (Brain And Acute Leukemia, Cytoplasmic) для предикции развития рецидива, оценки чувствительности и специфичности метода мониторинга BAALC с целью оценки эффективности терапии, мы проанализировали прогностическое значение гиперэкспрессии гена BAALC у 93 пациентов с ОМЛ в посттрансплантационном периоде. В свежих образцах костного мозга пациентов методом количественной ПЦР в режиме реального времени определялся уровень экспрессии гена BAALC. Пациенты были подразделены на группы низкой и высокой экспрессии BAALC на основании общего и индивидуального пороговых уровней экспрессии. Мы заключили, что гиперэкспрессия BAALC выше индивидуального и общего порогового уровней является прогностически значимым фактором для оценки риска развития рецидива в посттрансплантационном периоде, общей и безрецидивной выживаемости. Однако более детальный анализ BAALC как маркера эффективности терапии и его сравнение с референтными методами мониторинга минимальной остаточной болезни (такими как детекция химерных транскриптов генов методом количественной ПЦР в режиме реального времени) показал более низкую чувствительность такого подхода к мониторингу МОБ в посттрансплантационном периоде, по меньшей мере на примере исследуемой выборки пациентов. Частый мониторинг уровня экспрессии гена BAALC может быть рекомендован для предикции развития клинико-гематологического рецидива в ходе посттрансплантационного периода у пациентов с ОМЛ. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Острый миелобластный лейкоз, BAALC, экспрессия гена, клинический прогноз, минимальная остаточная болезнь. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(4331) "

Резюме

Острый миелоидный лейкоз (ОМЛ) представляет собой гетерогенное клональное заболевание крови опухолевой природы. Для пациентов с ОМЛ промежуточной цитогенетической группы риска, которая является гетерогенной по мутационному статусу целого ряда генов (FLT3, NPM1, CEBPA и т.д.), прогнозирование течения заболевания, оценка риска развития рецидива и выбор оптимальной терапии затруднены. В связи с этим поиск новых молекулярных маркеров, имеющих большое прогностическое значение, а так же полезных в аспекте оценки риска развития рецидива у пациентов с ОМЛ, лишенных крупных цитогенетических аномалий, является одной из приоритетных задач молекулярной онкогематологии. Для оценки применимости мониторинга уровня экспрессии гена BAALC (Brain And Acute Leukemia, Cytoplasmic) для предикции развития рецидива, оценки чувствительности и специфичности метода мониторинга BAALC с целью оценки эффективности терапии, мы проанализировали прогностическое значение гиперэкспрессии гена BAALC у 93 пациентов с ОМЛ в посттрансплантационном периоде. В свежих образцах костного мозга пациентов методом количественной ПЦР в режиме реального времени определялся уровень экспрессии гена BAALC. Пациенты были подразделены на группы низкой и высокой экспрессии BAALC на основании общего и индивидуального пороговых уровней экспрессии. Мы заключили, что гиперэкспрессия BAALC выше индивидуального и общего порогового уровней является прогностически значимым фактором для оценки риска развития рецидива в посттрансплантационном периоде, общей и безрецидивной выживаемости. Однако более детальный анализ BAALC как маркера эффективности терапии и его сравнение с референтными методами мониторинга минимальной остаточной болезни (такими как детекция химерных транскриптов генов методом количественной ПЦР в режиме реального времени) показал более низкую чувствительность такого подхода к мониторингу МОБ в посттрансплантационном периоде, по меньшей мере на примере исследуемой выборки пациентов. Частый мониторинг уровня экспрессии гена BAALC может быть рекомендован для предикции развития клинико-гематологического рецидива в ходе посттрансплантационного периода у пациентов с ОМЛ.

Ключевые слова

Острый миелобластный лейкоз, BAALC, экспрессия гена, клинический прогноз, минимальная остаточная болезнь.

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Резюме

Острый миелоидный лейкоз (ОМЛ) представляет собой гетерогенное клональное заболевание крови опухолевой природы. Для пациентов с ОМЛ промежуточной цитогенетической группы риска, которая является гетерогенной по мутационному статусу целого ряда генов (FLT3, NPM1, CEBPA и т.д.), прогнозирование течения заболевания, оценка риска развития рецидива и выбор оптимальной терапии затруднены. В связи с этим поиск новых молекулярных маркеров, имеющих большое прогностическое значение, а так же полезных в аспекте оценки риска развития рецидива у пациентов с ОМЛ, лишенных крупных цитогенетических аномалий, является одной из приоритетных задач молекулярной онкогематологии. Для оценки применимости мониторинга уровня экспрессии гена BAALC (Brain And Acute Leukemia, Cytoplasmic) для предикции развития рецидива, оценки чувствительности и специфичности метода мониторинга BAALC с целью оценки эффективности терапии, мы проанализировали прогностическое значение гиперэкспрессии гена BAALC у 93 пациентов с ОМЛ в посттрансплантационном периоде. В свежих образцах костного мозга пациентов методом количественной ПЦР в режиме реального времени определялся уровень экспрессии гена BAALC. Пациенты были подразделены на группы низкой и высокой экспрессии BAALC на основании общего и индивидуального пороговых уровней экспрессии. Мы заключили, что гиперэкспрессия BAALC выше индивидуального и общего порогового уровней является прогностически значимым фактором для оценки риска развития рецидива в посттрансплантационном периоде, общей и безрецидивной выживаемости. Однако более детальный анализ BAALC как маркера эффективности терапии и его сравнение с референтными методами мониторинга минимальной остаточной болезни (такими как детекция химерных транскриптов генов методом количественной ПЦР в режиме реального времени) показал более низкую чувствительность такого подхода к мониторингу МОБ в посттрансплантационном периоде, по меньшей мере на примере исследуемой выборки пациентов. Частый мониторинг уровня экспрессии гена BAALC может быть рекомендован для предикции развития клинико-гематологического рецидива в ходе посттрансплантационного периода у пациентов с ОМЛ.

Ключевые слова

Острый миелобластный лейкоз, BAALC, экспрессия гена, клинический прогноз, минимальная остаточная болезнь.

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Introduction

The t(3;21)(q26.2;q22) translocation, as well as trisomy 13 are rare but recurrent chromosome abnormalities which, to our best knowledge, have not yet encountered simultaneously in MDS/AML patients and, hence, have not been treated by means of allo-HSCT. The t(3;21) translocation is not rarely found in patients with therapy-related MDS/AML [1-7]. This disorder is, generally, characterized by aggressive clinical course [8, 9] and short event-free survival [10]. The t(3;21)(q26.2;q22) translocation results into a fusion between the RUNT domain of RUNX1, and EVI1 gene [11]. The EVI1 gene is known to encode a dual domain of the zinc-finger transcription factor which exhibits DNA binding activity acting together with a histone methyltransferase (SET) domain [12-14]. This molecule promotes self-renewal in hematopoietic stem cells. The t(3;21) translocation has been reported to occur in approximately 1% of AML or MDS cases [15]. Its clinical significance in MDS has been poorly determined, though poor prognosis appears to be proven in CML patients with t(3;21) [16-18]. It has been recently shown that t-MDS and t-AML positive for t(3;21) (q26.2;q22) are resistant both to cytostatic chemotherapy, and to allo-HSCT treatment [19]. Moreover, according to multicentric cytogenetic studies, trisomy 13 was observed in 0.2% patients, detectable as an single aberration, or combined with an additional abnormality [20]. A sufficient gender imbalance was reported for this condition (21 males of 27 cases). The median age of patients was 73 years. Isolated trisomy 13 was revealed in 96% of the cases. Of note, these patients with higher-risk MDS did not respond to therapy with hypomethylating agents. In general, trisomy 13 rarely occurs in MDS (0.2 to 0.8% of total), mostly as an isolated event, being something more frequent in AML (1-2%). Most of these patients are males over 70 years old. Typically, MDS proceeds with blast excess and moderate pancytopenia having poor prognosis, with median survival ranging between <6 months and 1 year. The patients with AML and trisomy 13 do not respond to standard intensive chemotherapy. For instance, treatment with hypomethylating agents is inefficient in this MDS type, though high-dose lenolidomide could be an option here. It should be also kept in mind, that trisomy 13 is associated with overexpression of FLT3 gene located at the extra chromosome. Besides, a close association between trisomy 13 and mutations of RUNX1 have been recently found [21, 22].

Materials and methods

Cytogenetic and molecular techniques

Serial cytogenetic investigations were carried out by a standard G-banding technique which has been recently published [23]. Identification of chromosomes and chromosomal aberrations was carried out according to International System Human Cytogenetic Nomenclature (ISCN) [24]. A serial molecular biological testing of donor chimerism was done on peripheral blood or bone marrow samples at the time of hematologic engraftment, as well as every 2 weeks between 1 and 3 months and every month between 3 and 12 months after transplantation were obtained and processed. Shortly, the evaluation was done by means of PCR-based Chimerix FA Kit (Inogene, Russia), by analyzing selected polymorphic short tandem repeat (STR) loci: D11S488, HUMVWFA31, D13S317, D8S639, D19S246, D4S2366, D12S1064, D16S539 and the sex determination marker Amelogenin. The amplified sample was analyzed by capillary electrophoresis using an ABI Prism 3500xl Genetic Analyser (Applied Biosystems). Quantification of the mixed chimerism (calculated as percent of recipient DNA) was performed by analyzing the proportion of the fluorescent peak areas corresponding to donor and patient genotypes.

Clinical case description

The patient was a 22-year-old male, initially presented in August 2006 with complaints for moderate fatigue and fever (37.4°C). Peripheral blood examination showed pancytopenia. Bone marrow aspirate was hypocellular with features of aplastic anemia. Cyclosporin A (CSA) was given, but it was taken by the patient only for two weeks due to hepatic discomfort. During the following three years, the patient did not visit a hematologist, and his condition was stable. In January of 2009 he noted exacerbation of fatigue and skin hemorrhages which required hospitalization to the Hematology Department. Peripheral blood counts were as follows: Hb, 55 g/L; WBC, 1.5x109/L; platelets, 4x109/L. The bone marrow aspirate was hypocellular, contained 15.5% blasts with diffuse-type periodic acid Schiff (PAS) staining, and 30% ring sideroblasts, whereas most neutrophilic cells were peroxidase-deficient. Immunophenotyping of the blast cells showed positivity for CD34, CD13, CD33, and HLA-DRA. The results of serial cytogenetic investigations and chimerism testing using molecular biology approaches are presented in Table 1.

64-69_Mamaev Table 1.png

64-69_Mamaev Figure 1.png

Figure 1. Karyogram of bone marrow cell 47, XY, t(3;21) (q26;q22),+13 from patient with primary myelodysplastic syndrome (RAEB-II)

Initial marrow karyotype was as following: 47, XY, t(3;21) (q26.2;q22),+13, (Fig. 1) with involvement into arrangement EVI1 gene (Fig. 2), whereas 10% metaphases had normal chromosome complement. Meanwhile, a standard molecular investigation with primers for common chromosome translocations did not show any oncogene anomalies. Therefore, a diagnosis of MDS RAEB -II IPSS 3.0 was established. Since the patient was transfusion-dependent for a long time, his ferritine level reached 2500 mg/mm3.

64-69_Mamaev Figure 2.png

Figure 2. Fluorescence in situ hybridization (FISH) with BreakApart EVI1 probe (CytoCell, UK) showing one normal EVI1 gene (one fusion yellow signal) and one abnormal EVI1 gene (one green and one red split signals on interphase cells) in the patient with translocation t(3;21)(q26.2;q22) RUNX1/EVI1

64-69_Mamaev Figure 3.png

Figure 3. Karyotype of donor’s bone marrow cell 46,XY from a patient with primary myelodysplastic syndrome after allogeneic bone marrow transplantation prepared during a short-term hematological and cytogenetic remission

64-69_Mamaev Figure 4.png

Figure 4. Schematic presentation of clinical course in a patient with primary myelodysplastic syndrome with karyotype 47,XY,t(3;21)(q26.2;q22),+13 associated with resistance to standard chemotherapy, hypomethylating agents and allo-HSCT

Before bone marrow transplantation, the patient obtained one 5-day course of Dacogen (Decitabine) as demethylating therapy. It did not change common blood parameters, but allowed to reduce his transfusion dependence. Since the patient had an HLA-DQB1-mismatched related donor (Table 1), allo-HSCT was considered. The patient was enrolled into the RIC/MAC study protocol, and randomized to RIC branch (Busulfan + Fludarabine – 800 and 300 mg, respectively). Graft-versus-host-disease (GvHD) prophylaxis included CSA and Methotrexate (MTX). Following the allo-HSCT, stem cell engraftment was detected on day +15, when mixed chimerism was 45-55%. By this time, bone marrow contained only 2.4% of blasts, and the previously detected chromosomal abnormalities were not found (Fig. 3, Table 1). GvHD symptoms were absent, but a cytogenetic relapse was documented two weeks later (on day +29), due to appearance of the marker chromosomal aberrations and decreasing donor chimerism which could be caused by small number of CD34+ stem cells in the graft. Therefore, cyclosporine A was stopped on day +38, and, a week later, a donor lymphocyte infusion (DLI) was performed at a dose of 5.0х107 cells/kg, however, without any clinical effect. The graft rejection was diagnosed on day D+50 (Fig. 4). By that time, the patient had hemoglobin levels of 57 g/L; WBC, 1.7x109/L; and platelets, l3.0x109/L. Bone marrow aspirate was hypocellular with 3.4% blasts, and the donor chimerism faded away (<5%). Because of allo-BMT failure, a second allo-HSCT was administered, using peripheral blood stem cells from the same donor. It was performed after RIC preparative regimen containing Fludarabine 350 mg, Thiotepa 960 mg, and Campath 40 mg. GvHD prophylaxis included Tacrolymus and CellCept (Mycophenolate Mofetyl). Engraftment was registered since day D+10. Two days later, acute GvHD of gut and skin (grade I) was diagnosed. Steroids were added to the treatment schedule which resulted into a significant improvement of GvHD. Peripheral blood findings on the day +16 after 2nd transplant were as follows: Hb, 92.0 g/L; WBC, 4.3x109/L, and platelets, 35.0x109/L. Bone marrow aspirate was hypocellular without blast excess, and full donor chimerism was achieved. Cytogenetic study has shown a repeated karyotype normalization. Due to high risk of relapse, another DLI procedure was performed. Despite the immunotherapy, a new cytogenetic relapse, along with reduced donor chimerism levels, was diagnosed in July 2010. An attempt to achieve another remission with hypomethylating agents (5 courses of Dacogen) was not successful. A repeated cytogenetic relapse has been diagnosed in December 2010, causing his death at the BMT Center two months later.

Discussion

To our knowledge, it is the first clinical description of primary MDS with t(3;21)(q26.2;q22), combined with trisomy 13, and treated by two subsequent allo-HSCTs from a partially HLA-mismatched sibling (brother). The first earliest relapse occurred on the day 29, which could be, in part, explained by low cellularity of transplant. Since a second transplant was required, a reduced-intensity conditioning was chosen again, but peripheral blood stem cells were used for the 2nd transplant. The second engraftment was longer. A new cytological relapse was diagnosed 2 months later as evidenced by increased blast counts in bone marrow up to 12% accompanied by recurrence of the above cytogenetic aberrations, as well as decreasing donor chimerism. Moreover, the patient did not respond to hypomethylating agents (5 courses of Dacogen), aiming to correct the hematopoietic disorder. Recent studies have shown that distinct portions of RUNX1 gene may fuse in variable manner to MDS1 and EVI1 genes located within the 3q26 region. On the other hand, these different fusion products are capable of blocking myeloid differentiation interfering with normal transcriptional regulatory functions of RUNX1 [14]. As a result, our MDS case with combined t(3;21) chromosome anomalies and trisomy 13, showing poor clinical prognosis, appears to be related to imbalance of GATA, ERG, MEIS1, HOXA9 and FLT3 genes at the stem cell level which could be responsible for leukemia cells resistance to both chemotherapy and allo-HSCT.

Acknowledgements

The authors are grateful to colleagues for their excellent support.

Conflict of interest

No conflicts of interests are declared.

References

1. Loke J, Assl SA, Imperato MR, Ptasinska A, Cauchy P, Grabovska Y, Soria NM, Raghavan M, Delwel HR, Cockerill PN, Heidenreich O, Bonifer C. RUNX1-EVI1 differentially reprogram the chromatin landscape in t(8;21) and t(3;21) AML. Cell Reports. 2017;19(8):1654-1668.
2. Rubin CM, Larson RA, Anastasi J, Winter JN, Thangavelu M, Vardiman JW, Rowley JD, Le Beau MM. t(3;21)(q26;q22): a recurring chromosomal abnormality in therapy-related myelodysplastic syndrome and acute myeloid leukemia. Blood. 1990; 76(12):2594-2598.
3. Pedersen-Bjergaard J, Philip P. Balanced translocations involving chromosome bands 11q23 and 21q22 are highly characteristic of myelodysplasias and leukemia following therapy with cytostatic agents targeting at DNA-topoisomerase II. Blood. 1991; 78(4):1147-1148.
4. Pedersen-Bjergaard J, Johansson B, Philip P. Translocation (3;21)(q26;q22) in therapy-related myelodysplasias following drugs targeting DNA-topoisomerase II combined with alkylating agents, and in myeloproliferative disorders undergoing spontaneous leukemic transformation. Cancer Genet Cytogenet. 1994; 76:50-55.
5. Schneider NR, Bowman WP, Frenkel EP. Translocation (3;21)(q26;q22) in secondary leukemia. Ann Génét 1991; 34(3-4):256-263.
6. Miyazaki H, Ino T, Sobue R, Kojima H, Wakita M, Nomura T, Tuzuki M, Hirano M. Translocation (3;21)(q26;q22) in treatment-related acute leukemia secondary to acute promyelocytic leukemia. Cancer Genet Cytogenet 1994; 74(2):84-86.
7. Tanaka R, Oshikawa G, Akiyama H, Ishida S, Nagao T, Yamamoto M, Miura O. Acute myeloid leukemia with t(3;21)(q26.2;q22) developing following low-dose Methotrexate therapy for rheumatoid arthritis and expressing two AML/MDS1/EVI1 fusion proteins. A case report. Oncology Letters. 2017;14(1):97-102.
8. Yin CC, Cortes J, Barkoh B, Hayes K, Kantarjian H, Jones D. t(3;21)(q26;q22) in myeloid leukemia: an aggressive syndrome of blast transformation associated with hydroxyurea or antimetabolite therapy. Cancer. 2006; 106(8):1730-1738.
9. Park TS, Choi JR, Yoon SH, Song J, Kim J, Kim SJ, Kwon O, Min YH. Acute promyelocytic leukemia relapsing as secondary acute myelogenous leukemia with translocation t(3;21)(q26;q22) and RUNX1-MDS1-EVI1 fusion transcript. Cancer Genet Cytogenet 2008; 187(2):61-73.
10. Lugthart S, Groschel S, Beverloo HB, Kayser S, Valk PJ, van Zelderen-Bhola SL, Jan Ossenkoppele G, Vellenga E, van den Bergde Ruiter E, Schanz U, Verhoef G, Vandenberghe P, Ferrant A, Kohne CH, Pfeundschuh M, Horst HA, Koller E, von Lilienfeld-Toal M, Bentz M, Ganser A, Schlegelberger B, Jotterand M, Krauter J, Pabst T, Theobald M, Schlenk RF, Delwel R, Dohner K, Lowenber B, Dohner H. Clinical,
molecular, and prognostic significance of WHO type inv(3) (q21q26.2)/t(3;3)(q21;q26.2) and various other 3q abnormalities in acute myeloid leukemia. J Clin Oncol. 2010; 28(24):3890-3898.
11. Nucifora G, Begy CR, Kobayashi H, Roulston D, Claxton D, Pedersen-Bjergaard J, Parganas E, Ihle JN, Rowley JD. Consistent intergenic splicing and production of multiple transcripts between AML1 at 21q22 and unrelated genes at 3q26 in (3;21)(q26;q22) translocation. Proc Natl Acad Sci USA. 1994; 91(9):4004-4008.
12. Morishita K, Suzukawa K, Taki T, Ihle JN, Yokota J. EVI- 1 zinc finger protein works as a transcriptional activator via binding to a consensus sequence of GACAAGATAAGATAAN1-28 CTCATCTTC. Oncogene. 1995; 10(10):1961-1967.
13. Hirai H, Ogawa S, Kurokawa M, Yazaki Y, Mitani K. Molecular characterization of the genomic breakpoints in a case of t(3;21)(q26;q22). Genes Chromosomes Cancer. 1999; 26(1):92-96.
14. Tokita K, Maki K, Mitani K. RUNX1/EVI1, which blocks myeloid differentiation, inhibits CCAAT-enhancer binding protein α function. Cancer Sci. 2007; 98(11):1752-1757. 15. Secker-Walker L, Mehta A, Bain B. Abnormalities of 3q21 and 3q26 in myeloid malignancy: a United Kingdom Cancer Cytogenetic Group study. Br J Haematol. 1995; 91(2):490-501.
16. Rubin CM, Larson RA, Bitter MA, Carrino JJ, Le Beau MM, Diaz MO, Rowley JD. Association of chromosomal 3;21 translocation with the blast phase of chronic myelogenous leukemia. Blood 1987; 70(5):1338-1342 .
17. Coyle T, Najfeld V. Translocation (3;21) in Philadelphia chromosome-positive chronic myelogenous leukemia prior to the onset of blast crisis. Am J Hematol. 1988; 27(1):56-59.
18. Phan CL, Megat Baharuddin PJ, Chin LP, Zakaria Z, Yegappan S, Sathar J, Tan SM, Purushothaman V, Chang KM. Amplification of BCR-ABL and t(3;21) in a patient with blast crisis of chronic myelogenous leukemia. Cancer Genet Cytogenet 2008; 180(1):60-64.
19. Testoni N, Borsaru G, Martinelli G, Carboni C, Ruggeri D, Ottaviani E, Pelliconi S, Ricci P, Pastano R, Visani G, Zaccaria A, Tura S. 3q21 and 3q26 cytogenetic abnormalities in acute myeloblastic leukemia: biological and clinical features. Haematologica 1999; 84(8):690-694.
20. Bacher U, Schanz J, Braulke F, Haase D. Rare cytogenetic abnormalities in myelodysplastic syndromes. Mediterr J Hematol Infect Dis 2015; 7(1): e2015034, DOI: http://dx.doi.org/10.4084/MJHID.2015.034.
21. Dicker F, Haferlach C, Kern W, Haferlach T, Schnittger S. Trisomy 13 is strongly associated with AML1/RUNX1 mutations and increased FLT3 expression in acute myeloid leukemia. Blood 2007; 110(4):1308-1316.
22. Silva FPG, Lind A, Brouwer-Mandema G, Valk PJ, Giphart-Gassler M. Trisomy 13 correlates with RUNX1 mutation
and increased FLT3 expression in AML-M0 patients. Haematologica 2007; 92(8):1123-1126.
23. Gindina T, Mamaev N, Barkhatov I, Solomonova I, Semenova E, Zubarovskaya L, Morozova E, Rudnitskaya Yu, Popva M, Alexeev S, Uspenskaya O, Bondarenko S, Afanasyev B. Complex chromosome damages in patients with recurrent acute leukemias after allogeneic hematopoietic stem cell transplantation. Ther Arkhiv 2012; 84(8):61-66 (In Russian).
24. Schaffer L., McGovan-Jordan J., Schmid M. ISCN. An international System for Human Cytogenetic Nomenclature. S. Karger, Basel. Switzerland, 2013, p.140.

" ["~DETAIL_TEXT"]=> string(18651) "

Introduction

The t(3;21)(q26.2;q22) translocation, as well as trisomy 13 are rare but recurrent chromosome abnormalities which, to our best knowledge, have not yet encountered simultaneously in MDS/AML patients and, hence, have not been treated by means of allo-HSCT. The t(3;21) translocation is not rarely found in patients with therapy-related MDS/AML [1-7]. This disorder is, generally, characterized by aggressive clinical course [8, 9] and short event-free survival [10]. The t(3;21)(q26.2;q22) translocation results into a fusion between the RUNT domain of RUNX1, and EVI1 gene [11]. The EVI1 gene is known to encode a dual domain of the zinc-finger transcription factor which exhibits DNA binding activity acting together with a histone methyltransferase (SET) domain [12-14]. This molecule promotes self-renewal in hematopoietic stem cells. The t(3;21) translocation has been reported to occur in approximately 1% of AML or MDS cases [15]. Its clinical significance in MDS has been poorly determined, though poor prognosis appears to be proven in CML patients with t(3;21) [16-18]. It has been recently shown that t-MDS and t-AML positive for t(3;21) (q26.2;q22) are resistant both to cytostatic chemotherapy, and to allo-HSCT treatment [19]. Moreover, according to multicentric cytogenetic studies, trisomy 13 was observed in 0.2% patients, detectable as an single aberration, or combined with an additional abnormality [20]. A sufficient gender imbalance was reported for this condition (21 males of 27 cases). The median age of patients was 73 years. Isolated trisomy 13 was revealed in 96% of the cases. Of note, these patients with higher-risk MDS did not respond to therapy with hypomethylating agents. In general, trisomy 13 rarely occurs in MDS (0.2 to 0.8% of total), mostly as an isolated event, being something more frequent in AML (1-2%). Most of these patients are males over 70 years old. Typically, MDS proceeds with blast excess and moderate pancytopenia having poor prognosis, with median survival ranging between <6 months and 1 year. The patients with AML and trisomy 13 do not respond to standard intensive chemotherapy. For instance, treatment with hypomethylating agents is inefficient in this MDS type, though high-dose lenolidomide could be an option here. It should be also kept in mind, that trisomy 13 is associated with overexpression of FLT3 gene located at the extra chromosome. Besides, a close association between trisomy 13 and mutations of RUNX1 have been recently found [21, 22].

Materials and methods

Cytogenetic and molecular techniques

Serial cytogenetic investigations were carried out by a standard G-banding technique which has been recently published [23]. Identification of chromosomes and chromosomal aberrations was carried out according to International System Human Cytogenetic Nomenclature (ISCN) [24]. A serial molecular biological testing of donor chimerism was done on peripheral blood or bone marrow samples at the time of hematologic engraftment, as well as every 2 weeks between 1 and 3 months and every month between 3 and 12 months after transplantation were obtained and processed. Shortly, the evaluation was done by means of PCR-based Chimerix FA Kit (Inogene, Russia), by analyzing selected polymorphic short tandem repeat (STR) loci: D11S488, HUMVWFA31, D13S317, D8S639, D19S246, D4S2366, D12S1064, D16S539 and the sex determination marker Amelogenin. The amplified sample was analyzed by capillary electrophoresis using an ABI Prism 3500xl Genetic Analyser (Applied Biosystems). Quantification of the mixed chimerism (calculated as percent of recipient DNA) was performed by analyzing the proportion of the fluorescent peak areas corresponding to donor and patient genotypes.

Clinical case description

The patient was a 22-year-old male, initially presented in August 2006 with complaints for moderate fatigue and fever (37.4°C). Peripheral blood examination showed pancytopenia. Bone marrow aspirate was hypocellular with features of aplastic anemia. Cyclosporin A (CSA) was given, but it was taken by the patient only for two weeks due to hepatic discomfort. During the following three years, the patient did not visit a hematologist, and his condition was stable. In January of 2009 he noted exacerbation of fatigue and skin hemorrhages which required hospitalization to the Hematology Department. Peripheral blood counts were as follows: Hb, 55 g/L; WBC, 1.5x109/L; platelets, 4x109/L. The bone marrow aspirate was hypocellular, contained 15.5% blasts with diffuse-type periodic acid Schiff (PAS) staining, and 30% ring sideroblasts, whereas most neutrophilic cells were peroxidase-deficient. Immunophenotyping of the blast cells showed positivity for CD34, CD13, CD33, and HLA-DRA. The results of serial cytogenetic investigations and chimerism testing using molecular biology approaches are presented in Table 1.

64-69_Mamaev Table 1.png

64-69_Mamaev Figure 1.png

Figure 1. Karyogram of bone marrow cell 47, XY, t(3;21) (q26;q22),+13 from patient with primary myelodysplastic syndrome (RAEB-II)

Initial marrow karyotype was as following: 47, XY, t(3;21) (q26.2;q22),+13, (Fig. 1) with involvement into arrangement EVI1 gene (Fig. 2), whereas 10% metaphases had normal chromosome complement. Meanwhile, a standard molecular investigation with primers for common chromosome translocations did not show any oncogene anomalies. Therefore, a diagnosis of MDS RAEB -II IPSS 3.0 was established. Since the patient was transfusion-dependent for a long time, his ferritine level reached 2500 mg/mm3.

64-69_Mamaev Figure 2.png

Figure 2. Fluorescence in situ hybridization (FISH) with BreakApart EVI1 probe (CytoCell, UK) showing one normal EVI1 gene (one fusion yellow signal) and one abnormal EVI1 gene (one green and one red split signals on interphase cells) in the patient with translocation t(3;21)(q26.2;q22) RUNX1/EVI1

64-69_Mamaev Figure 3.png

Figure 3. Karyotype of donor’s bone marrow cell 46,XY from a patient with primary myelodysplastic syndrome after allogeneic bone marrow transplantation prepared during a short-term hematological and cytogenetic remission

64-69_Mamaev Figure 4.png

Figure 4. Schematic presentation of clinical course in a patient with primary myelodysplastic syndrome with karyotype 47,XY,t(3;21)(q26.2;q22),+13 associated with resistance to standard chemotherapy, hypomethylating agents and allo-HSCT

Before bone marrow transplantation, the patient obtained one 5-day course of Dacogen (Decitabine) as demethylating therapy. It did not change common blood parameters, but allowed to reduce his transfusion dependence. Since the patient had an HLA-DQB1-mismatched related donor (Table 1), allo-HSCT was considered. The patient was enrolled into the RIC/MAC study protocol, and randomized to RIC branch (Busulfan + Fludarabine – 800 and 300 mg, respectively). Graft-versus-host-disease (GvHD) prophylaxis included CSA and Methotrexate (MTX). Following the allo-HSCT, stem cell engraftment was detected on day +15, when mixed chimerism was 45-55%. By this time, bone marrow contained only 2.4% of blasts, and the previously detected chromosomal abnormalities were not found (Fig. 3, Table 1). GvHD symptoms were absent, but a cytogenetic relapse was documented two weeks later (on day +29), due to appearance of the marker chromosomal aberrations and decreasing donor chimerism which could be caused by small number of CD34+ stem cells in the graft. Therefore, cyclosporine A was stopped on day +38, and, a week later, a donor lymphocyte infusion (DLI) was performed at a dose of 5.0х107 cells/kg, however, without any clinical effect. The graft rejection was diagnosed on day D+50 (Fig. 4). By that time, the patient had hemoglobin levels of 57 g/L; WBC, 1.7x109/L; and platelets, l3.0x109/L. Bone marrow aspirate was hypocellular with 3.4% blasts, and the donor chimerism faded away (<5%). Because of allo-BMT failure, a second allo-HSCT was administered, using peripheral blood stem cells from the same donor. It was performed after RIC preparative regimen containing Fludarabine 350 mg, Thiotepa 960 mg, and Campath 40 mg. GvHD prophylaxis included Tacrolymus and CellCept (Mycophenolate Mofetyl). Engraftment was registered since day D+10. Two days later, acute GvHD of gut and skin (grade I) was diagnosed. Steroids were added to the treatment schedule which resulted into a significant improvement of GvHD. Peripheral blood findings on the day +16 after 2nd transplant were as follows: Hb, 92.0 g/L; WBC, 4.3x109/L, and platelets, 35.0x109/L. Bone marrow aspirate was hypocellular without blast excess, and full donor chimerism was achieved. Cytogenetic study has shown a repeated karyotype normalization. Due to high risk of relapse, another DLI procedure was performed. Despite the immunotherapy, a new cytogenetic relapse, along with reduced donor chimerism levels, was diagnosed in July 2010. An attempt to achieve another remission with hypomethylating agents (5 courses of Dacogen) was not successful. A repeated cytogenetic relapse has been diagnosed in December 2010, causing his death at the BMT Center two months later.

Discussion

To our knowledge, it is the first clinical description of primary MDS with t(3;21)(q26.2;q22), combined with trisomy 13, and treated by two subsequent allo-HSCTs from a partially HLA-mismatched sibling (brother). The first earliest relapse occurred on the day 29, which could be, in part, explained by low cellularity of transplant. Since a second transplant was required, a reduced-intensity conditioning was chosen again, but peripheral blood stem cells were used for the 2nd transplant. The second engraftment was longer. A new cytological relapse was diagnosed 2 months later as evidenced by increased blast counts in bone marrow up to 12% accompanied by recurrence of the above cytogenetic aberrations, as well as decreasing donor chimerism. Moreover, the patient did not respond to hypomethylating agents (5 courses of Dacogen), aiming to correct the hematopoietic disorder. Recent studies have shown that distinct portions of RUNX1 gene may fuse in variable manner to MDS1 and EVI1 genes located within the 3q26 region. On the other hand, these different fusion products are capable of blocking myeloid differentiation interfering with normal transcriptional regulatory functions of RUNX1 [14]. As a result, our MDS case with combined t(3;21) chromosome anomalies and trisomy 13, showing poor clinical prognosis, appears to be related to imbalance of GATA, ERG, MEIS1, HOXA9 and FLT3 genes at the stem cell level which could be responsible for leukemia cells resistance to both chemotherapy and allo-HSCT.

Acknowledgements

The authors are grateful to colleagues for their excellent support.

Conflict of interest

No conflicts of interests are declared.

References

1. Loke J, Assl SA, Imperato MR, Ptasinska A, Cauchy P, Grabovska Y, Soria NM, Raghavan M, Delwel HR, Cockerill PN, Heidenreich O, Bonifer C. RUNX1-EVI1 differentially reprogram the chromatin landscape in t(8;21) and t(3;21) AML. Cell Reports. 2017;19(8):1654-1668.
2. Rubin CM, Larson RA, Anastasi J, Winter JN, Thangavelu M, Vardiman JW, Rowley JD, Le Beau MM. t(3;21)(q26;q22): a recurring chromosomal abnormality in therapy-related myelodysplastic syndrome and acute myeloid leukemia. Blood. 1990; 76(12):2594-2598.
3. Pedersen-Bjergaard J, Philip P. Balanced translocations involving chromosome bands 11q23 and 21q22 are highly characteristic of myelodysplasias and leukemia following therapy with cytostatic agents targeting at DNA-topoisomerase II. Blood. 1991; 78(4):1147-1148.
4. Pedersen-Bjergaard J, Johansson B, Philip P. Translocation (3;21)(q26;q22) in therapy-related myelodysplasias following drugs targeting DNA-topoisomerase II combined with alkylating agents, and in myeloproliferative disorders undergoing spontaneous leukemic transformation. Cancer Genet Cytogenet. 1994; 76:50-55.
5. Schneider NR, Bowman WP, Frenkel EP. Translocation (3;21)(q26;q22) in secondary leukemia. Ann Génét 1991; 34(3-4):256-263.
6. Miyazaki H, Ino T, Sobue R, Kojima H, Wakita M, Nomura T, Tuzuki M, Hirano M. Translocation (3;21)(q26;q22) in treatment-related acute leukemia secondary to acute promyelocytic leukemia. Cancer Genet Cytogenet 1994; 74(2):84-86.
7. Tanaka R, Oshikawa G, Akiyama H, Ishida S, Nagao T, Yamamoto M, Miura O. Acute myeloid leukemia with t(3;21)(q26.2;q22) developing following low-dose Methotrexate therapy for rheumatoid arthritis and expressing two AML/MDS1/EVI1 fusion proteins. A case report. Oncology Letters. 2017;14(1):97-102.
8. Yin CC, Cortes J, Barkoh B, Hayes K, Kantarjian H, Jones D. t(3;21)(q26;q22) in myeloid leukemia: an aggressive syndrome of blast transformation associated with hydroxyurea or antimetabolite therapy. Cancer. 2006; 106(8):1730-1738.
9. Park TS, Choi JR, Yoon SH, Song J, Kim J, Kim SJ, Kwon O, Min YH. Acute promyelocytic leukemia relapsing as secondary acute myelogenous leukemia with translocation t(3;21)(q26;q22) and RUNX1-MDS1-EVI1 fusion transcript. Cancer Genet Cytogenet 2008; 187(2):61-73.
10. Lugthart S, Groschel S, Beverloo HB, Kayser S, Valk PJ, van Zelderen-Bhola SL, Jan Ossenkoppele G, Vellenga E, van den Bergde Ruiter E, Schanz U, Verhoef G, Vandenberghe P, Ferrant A, Kohne CH, Pfeundschuh M, Horst HA, Koller E, von Lilienfeld-Toal M, Bentz M, Ganser A, Schlegelberger B, Jotterand M, Krauter J, Pabst T, Theobald M, Schlenk RF, Delwel R, Dohner K, Lowenber B, Dohner H. Clinical,
molecular, and prognostic significance of WHO type inv(3) (q21q26.2)/t(3;3)(q21;q26.2) and various other 3q abnormalities in acute myeloid leukemia. J Clin Oncol. 2010; 28(24):3890-3898.
11. Nucifora G, Begy CR, Kobayashi H, Roulston D, Claxton D, Pedersen-Bjergaard J, Parganas E, Ihle JN, Rowley JD. Consistent intergenic splicing and production of multiple transcripts between AML1 at 21q22 and unrelated genes at 3q26 in (3;21)(q26;q22) translocation. Proc Natl Acad Sci USA. 1994; 91(9):4004-4008.
12. Morishita K, Suzukawa K, Taki T, Ihle JN, Yokota J. EVI- 1 zinc finger protein works as a transcriptional activator via binding to a consensus sequence of GACAAGATAAGATAAN1-28 CTCATCTTC. Oncogene. 1995; 10(10):1961-1967.
13. Hirai H, Ogawa S, Kurokawa M, Yazaki Y, Mitani K. Molecular characterization of the genomic breakpoints in a case of t(3;21)(q26;q22). Genes Chromosomes Cancer. 1999; 26(1):92-96.
14. Tokita K, Maki K, Mitani K. RUNX1/EVI1, which blocks myeloid differentiation, inhibits CCAAT-enhancer binding protein α function. Cancer Sci. 2007; 98(11):1752-1757. 15. Secker-Walker L, Mehta A, Bain B. Abnormalities of 3q21 and 3q26 in myeloid malignancy: a United Kingdom Cancer Cytogenetic Group study. Br J Haematol. 1995; 91(2):490-501.
16. Rubin CM, Larson RA, Bitter MA, Carrino JJ, Le Beau MM, Diaz MO, Rowley JD. Association of chromosomal 3;21 translocation with the blast phase of chronic myelogenous leukemia. Blood 1987; 70(5):1338-1342 .
17. Coyle T, Najfeld V. Translocation (3;21) in Philadelphia chromosome-positive chronic myelogenous leukemia prior to the onset of blast crisis. Am J Hematol. 1988; 27(1):56-59.
18. Phan CL, Megat Baharuddin PJ, Chin LP, Zakaria Z, Yegappan S, Sathar J, Tan SM, Purushothaman V, Chang KM. Amplification of BCR-ABL and t(3;21) in a patient with blast crisis of chronic myelogenous leukemia. Cancer Genet Cytogenet 2008; 180(1):60-64.
19. Testoni N, Borsaru G, Martinelli G, Carboni C, Ruggeri D, Ottaviani E, Pelliconi S, Ricci P, Pastano R, Visani G, Zaccaria A, Tura S. 3q21 and 3q26 cytogenetic abnormalities in acute myeloblastic leukemia: biological and clinical features. Haematologica 1999; 84(8):690-694.
20. Bacher U, Schanz J, Braulke F, Haase D. Rare cytogenetic abnormalities in myelodysplastic syndromes. Mediterr J Hematol Infect Dis 2015; 7(1): e2015034, DOI: http://dx.doi.org/10.4084/MJHID.2015.034.
21. Dicker F, Haferlach C, Kern W, Haferlach T, Schnittger S. Trisomy 13 is strongly associated with AML1/RUNX1 mutations and increased FLT3 expression in acute myeloid leukemia. Blood 2007; 110(4):1308-1316.
22. Silva FPG, Lind A, Brouwer-Mandema G, Valk PJ, Giphart-Gassler M. Trisomy 13 correlates with RUNX1 mutation
and increased FLT3 expression in AML-M0 patients. Haematologica 2007; 92(8):1123-1126.
23. Gindina T, Mamaev N, Barkhatov I, Solomonova I, Semenova E, Zubarovskaya L, Morozova E, Rudnitskaya Yu, Popva M, Alexeev S, Uspenskaya O, Bondarenko S, Afanasyev B. Complex chromosome damages in patients with recurrent acute leukemias after allogeneic hematopoietic stem cell transplantation. Ther Arkhiv 2012; 84(8):61-66 (In Russian).
24. Schaffer L., McGovan-Jordan J., Schmid M. ISCN. An international System for Human Cytogenetic Nomenclature. S. Karger, Basel. Switzerland, 2013, p.140.

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Павлова, Санкт-Петербург, Россия" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(22) "Организации" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_RU"]=> array(36) { ["ID"]=> string(2) "27" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(29) "Описание/Резюме" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "27" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20239" ["VALUE"]=> array(2) { ["TEXT"]=> string(1650) "<p style="text-align: justify;"> Представлено наблюдение миелодиспластического синдрома (МДС) с двумя редкими, повторяющимися и прогностически неблагоприятными нарушениями хромосом: транслокацией t(3;21)(q26.2;q22) и трисомией 13, которые обеспечили патологическим элементам резистентность к химиотерапии и трансплантации гемопоэтических стволовых клеток от сиблинга. На основании полученных данных и обсуждения в свете недавно открытых молекулярных механизмов резистентности к терапии при данном виде хромосомной патологии сделано заключение об ответственности данных нарушений хромосом за развитие резистентности к терапии, включая алло-ТГСК у больных МДС. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Первичный миелодиспластический синдром, t(3;21) (q26.2;q22), трисомия 13, ген EVI1/RUNX1, аллогенная трансплантация гемопоэтических клеток, резистентность к терапии. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(1584) "

Представлено наблюдение миелодиспластического синдрома (МДС) с двумя редкими, повторяющимися и прогностически неблагоприятными нарушениями хромосом: транслокацией t(3;21)(q26.2;q22) и трисомией 13, которые обеспечили патологическим элементам резистентность к химиотерапии и трансплантации гемопоэтических стволовых клеток от сиблинга. На основании полученных данных и обсуждения в свете недавно открытых молекулярных механизмов резистентности к терапии при данном виде хромосомной патологии сделано заключение об ответственности данных нарушений хромосом за развитие резистентности к терапии, включая алло-ТГСК у больных МДС.

Ключевые слова

Первичный миелодиспластический синдром, t(3;21) (q26.2;q22), трисомия 13, ген EVI1/RUNX1, аллогенная трансплантация гемопоэтических клеток, резистентность к терапии.

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Mamaev, Tatiana L. Gindina, Elena V. Morozova, Yuliya V. Rudnitskaya, Maria V. Gubina, Ildar M. Barkhatov, Sergey N. Bondarenko, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(160) "Nikolay N. Mamaev, Tatiana L. Gindina, Elena V. Morozova, Yuliya V. Rudnitskaya, Maria V. Gubina, Ildar M. Barkhatov, Sergey N. Bondarenko, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(6) "Author" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["ORGANIZATION_EN"]=> array(36) { ["ID"]=> string(2) "38" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(12) "Organization" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(15) "ORGANIZATION_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "38" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20242" ["VALUE"]=> array(2) { ["TEXT"]=> string(194) "R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantology at the St. Petersburg State I. Pavlov Medical University, L. Tolstoy St. 6-8, 197022, St. Petersburg, Russia" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(194) "R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantology at the St. Petersburg State I. Pavlov Medical University, L. Tolstoy St. 6-8, 197022, St. Petersburg, Russia" ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(12) "Organization" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } } ["SUMMARY_EN"]=> array(36) { ["ID"]=> string(2) "39" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(21) "Description / Summary" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "39" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20246" ["VALUE"]=> array(2) { ["TEXT"]=> string(1178) "<p style="text-align: justify;"> We present a case of primary myelodysplastic syndrome (MDS) in a young male with two rare but recurrent chromosome abnormalities, i.e., t(3;21)(q26.2;q22) and trisomy 13. He obtained one Dacogen course at the BMT Center followed by sequential transplantation of allogeneic bone marrow and peripheral blood hematopoietic stem cells from an HLA-DQB1 mismatched donor. The rejection of the first graft was documented on day 29 after transplantation, whereas the 2nd allo-HSCT grafting was more successful. The article contains serial cytogenetic findings and time-dependent changes in donor chimerism. We discuss individual resistance to the therapy, in view of recently proposed molecular mechanisms of resistance which might be responsible for resistance of cells in this case with complex chromosomal pathology. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Myelodysplastic syndrome, primary translocation t(3;21)(q26.2;q22), trisomy 13, EVI1/RUNX1 gene, allogeneic hematopoietic stem cell transplantation, therapy resistance. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(1112) "

We present a case of primary myelodysplastic syndrome (MDS) in a young male with two rare but recurrent chromosome abnormalities, i.e., t(3;21)(q26.2;q22) and trisomy 13. He obtained one Dacogen course at the BMT Center followed by sequential transplantation of allogeneic bone marrow and peripheral blood hematopoietic stem cells from an HLA-DQB1 mismatched donor. The rejection of the first graft was documented on day 29 after transplantation, whereas the 2nd allo-HSCT grafting was more successful. The article contains serial cytogenetic findings and time-dependent changes in donor chimerism. We discuss individual resistance to the therapy, in view of recently proposed molecular mechanisms of resistance which might be responsible for resistance of cells in this case with complex chromosomal pathology.

Keywords

Myelodysplastic syndrome, primary translocation t(3;21)(q26.2;q22), trisomy 13, EVI1/RUNX1 gene, allogeneic hematopoietic stem cell transplantation, therapy resistance.

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Mamaev, Tatiana L. Gindina, Elena V. Morozova, Yuliya V. Rudnitskaya, Maria V. Gubina, Ildar M. Barkhatov, Sergey N. Bondarenko, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(160) "Nikolay N. Mamaev, Tatiana L. Gindina, Elena V. Morozova, Yuliya V. Rudnitskaya, Maria V. Gubina, Ildar M. Barkhatov, Sergey N. Bondarenko, Boris V. Afanasyev " ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(6) "Author" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["DISPLAY_VALUE"]=> string(160) "Nikolay N. Mamaev, Tatiana L. Gindina, Elena V. Morozova, Yuliya V. Rudnitskaya, Maria V. Gubina, Ildar M. Barkhatov, Sergey N. Bondarenko, Boris V. Afanasyev " } ["SUMMARY_EN"]=> array(37) { ["ID"]=> string(2) "39" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:02:59" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(21) "Description / Summary" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_EN" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "39" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20246" ["VALUE"]=> array(2) { ["TEXT"]=> string(1178) "<p style="text-align: justify;"> We present a case of primary myelodysplastic syndrome (MDS) in a young male with two rare but recurrent chromosome abnormalities, i.e., t(3;21)(q26.2;q22) and trisomy 13. He obtained one Dacogen course at the BMT Center followed by sequential transplantation of allogeneic bone marrow and peripheral blood hematopoietic stem cells from an HLA-DQB1 mismatched donor. The rejection of the first graft was documented on day 29 after transplantation, whereas the 2nd allo-HSCT grafting was more successful. The article contains serial cytogenetic findings and time-dependent changes in donor chimerism. We discuss individual resistance to the therapy, in view of recently proposed molecular mechanisms of resistance which might be responsible for resistance of cells in this case with complex chromosomal pathology. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Myelodysplastic syndrome, primary translocation t(3;21)(q26.2;q22), trisomy 13, EVI1/RUNX1 gene, allogeneic hematopoietic stem cell transplantation, therapy resistance. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(1112) "

We present a case of primary myelodysplastic syndrome (MDS) in a young male with two rare but recurrent chromosome abnormalities, i.e., t(3;21)(q26.2;q22) and trisomy 13. He obtained one Dacogen course at the BMT Center followed by sequential transplantation of allogeneic bone marrow and peripheral blood hematopoietic stem cells from an HLA-DQB1 mismatched donor. The rejection of the first graft was documented on day 29 after transplantation, whereas the 2nd allo-HSCT grafting was more successful. The article contains serial cytogenetic findings and time-dependent changes in donor chimerism. We discuss individual resistance to the therapy, in view of recently proposed molecular mechanisms of resistance which might be responsible for resistance of cells in this case with complex chromosomal pathology.

Keywords

Myelodysplastic syndrome, primary translocation t(3;21)(q26.2;q22), trisomy 13, EVI1/RUNX1 gene, allogeneic hematopoietic stem cell transplantation, therapy resistance.

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We present a case of primary myelodysplastic syndrome (MDS) in a young male with two rare but recurrent chromosome abnormalities, i.e., t(3;21)(q26.2;q22) and trisomy 13. He obtained one Dacogen course at the BMT Center followed by sequential transplantation of allogeneic bone marrow and peripheral blood hematopoietic stem cells from an HLA-DQB1 mismatched donor. The rejection of the first graft was documented on day 29 after transplantation, whereas the 2nd allo-HSCT grafting was more successful. The article contains serial cytogenetic findings and time-dependent changes in donor chimerism. We discuss individual resistance to the therapy, in view of recently proposed molecular mechanisms of resistance which might be responsible for resistance of cells in this case with complex chromosomal pathology.

Keywords

Myelodysplastic syndrome, primary translocation t(3;21)(q26.2;q22), trisomy 13, EVI1/RUNX1 gene, allogeneic hematopoietic stem cell transplantation, therapy resistance.

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Мамаев, Татьяна Л. Гиндина, Елена В. Морозова, Юлия В. Рудницкая, Мария В. Губина, Ильдар М. Бархатов, Сергей Н. Бондаренко, Борис В. Афанасьев " ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(272) "Николай Н. Мамаев, Татьяна Л. Гиндина, Елена В. Морозова, Юлия В. Рудницкая, Мария В. Губина, Ильдар М. Бархатов, Сергей Н. Бондаренко, Борис В. Афанасьев " ["TYPE"]=> string(4) "HTML" } ["~DESCRIPTION"]=> string(0) "" ["~NAME"]=> string(12) "Авторы" ["~DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["DISPLAY_VALUE"]=> string(272) "Николай Н. Мамаев, Татьяна Л. Гиндина, Елена В. Морозова, Юлия В. Рудницкая, Мария В. Губина, Ильдар М. Бархатов, Сергей Н. Бондаренко, Борис В. Афанасьев " } ["SUMMARY_RU"]=> array(37) { ["ID"]=> string(2) "27" ["TIMESTAMP_X"]=> string(19) "2015-09-02 18:01:20" ["IBLOCK_ID"]=> string(1) "2" ["NAME"]=> string(29) "Описание/Резюме" ["ACTIVE"]=> string(1) "Y" ["SORT"]=> string(3) "500" ["CODE"]=> string(10) "SUMMARY_RU" ["DEFAULT_VALUE"]=> array(2) { ["TEXT"]=> string(0) "" ["TYPE"]=> string(4) "HTML" } ["PROPERTY_TYPE"]=> string(1) "S" ["ROW_COUNT"]=> string(1) "1" ["COL_COUNT"]=> string(2) "30" ["LIST_TYPE"]=> string(1) "L" ["MULTIPLE"]=> string(1) "N" ["XML_ID"]=> string(2) "27" ["FILE_TYPE"]=> string(0) "" ["MULTIPLE_CNT"]=> string(1) "5" ["TMP_ID"]=> NULL ["LINK_IBLOCK_ID"]=> string(1) "0" ["WITH_DESCRIPTION"]=> string(1) "N" ["SEARCHABLE"]=> string(1) "N" ["FILTRABLE"]=> string(1) "N" ["IS_REQUIRED"]=> string(1) "N" ["VERSION"]=> string(1) "1" ["USER_TYPE"]=> string(4) "HTML" ["USER_TYPE_SETTINGS"]=> array(1) { ["height"]=> int(200) } ["HINT"]=> string(0) "" ["PROPERTY_VALUE_ID"]=> string(5) "20239" ["VALUE"]=> array(2) { ["TEXT"]=> string(1650) "<p style="text-align: justify;"> Представлено наблюдение миелодиспластического синдрома (МДС) с двумя редкими, повторяющимися и прогностически неблагоприятными нарушениями хромосом: транслокацией t(3;21)(q26.2;q22) и трисомией 13, которые обеспечили патологическим элементам резистентность к химиотерапии и трансплантации гемопоэтических стволовых клеток от сиблинга. На основании полученных данных и обсуждения в свете недавно открытых молекулярных механизмов резистентности к терапии при данном виде хромосомной патологии сделано заключение об ответственности данных нарушений хромосом за развитие резистентности к терапии, включая алло-ТГСК у больных МДС. </p> <h2 style="text-align: justify;">Ключевые слова</h2> <p style="text-align: justify;"> Первичный миелодиспластический синдром, t(3;21) (q26.2;q22), трисомия 13, ген EVI1/RUNX1, аллогенная трансплантация гемопоэтических клеток, резистентность к терапии. </p>" ["TYPE"]=> string(4) "HTML" } ["DESCRIPTION"]=> string(0) "" ["VALUE_ENUM"]=> NULL ["VALUE_XML_ID"]=> NULL ["VALUE_SORT"]=> NULL ["~VALUE"]=> array(2) { ["TEXT"]=> string(1584) "

Представлено наблюдение миелодиспластического синдрома (МДС) с двумя редкими, повторяющимися и прогностически неблагоприятными нарушениями хромосом: транслокацией t(3;21)(q26.2;q22) и трисомией 13, которые обеспечили патологическим элементам резистентность к химиотерапии и трансплантации гемопоэтических стволовых клеток от сиблинга. На основании полученных данных и обсуждения в свете недавно открытых молекулярных механизмов резистентности к терапии при данном виде хромосомной патологии сделано заключение об ответственности данных нарушений хромосом за развитие резистентности к терапии, включая алло-ТГСК у больных МДС.

Ключевые слова

Первичный миелодиспластический синдром, t(3;21) (q26.2;q22), трисомия 13, ген EVI1/RUNX1, аллогенная трансплантация гемопоэтических клеток, резистентность к терапии.

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Представлено наблюдение миелодиспластического синдрома (МДС) с двумя редкими, повторяющимися и прогностически неблагоприятными нарушениями хромосом: транслокацией t(3;21)(q26.2;q22) и трисомией 13, которые обеспечили патологическим элементам резистентность к химиотерапии и трансплантации гемопоэтических стволовых клеток от сиблинга. На основании полученных данных и обсуждения в свете недавно открытых молекулярных механизмов резистентности к терапии при данном виде хромосомной патологии сделано заключение об ответственности данных нарушений хромосом за развитие резистентности к терапии, включая алло-ТГСК у больных МДС.

Ключевые слова

Первичный миелодиспластический синдром, t(3;21) (q26.2;q22), трисомия 13, ген EVI1/RUNX1, аллогенная трансплантация гемопоэтических клеток, резистентность к терапии.

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Clinical studies

Safety and efficacy of nivolumab applied at different dosage in the patients with relapsing Hodgkin lymphoma after allogeneic hematopoietic stem cell transplantation
Kirill V. Lepik, Andrey V. Kozlov, Evgeniya S. Borzenkova, Marina O. Popova, Ivan S. Moiseev, Elena I. Darskaya, Asmik G. Gevorgyan, Luibov A. Tsvetkova, Sergey N. Bondarenko, Alexander L. Alyanskiy, Elena V. Kondakova, Natalya B. Mikhailova, Boris V. Afanasyev
Ten-year experience of allogeneic haploidentical hematopoietic stem cell transplantation with non-manipulated grafts in children and adolescents with high-risk acute leukemia
Olesya V. Paina, Polina V. Kozhokar, Anastasia S. Borovkova, Anastasia S. Frolova, Kirill A. Ekushov, Tatyana A. Bykova, Zhemal Z. Rakhmanova, Mariya A. Galas, Aigul G. Khabirova, Inna V. Markova, Elena V. Semenova, Sergey N. Bondarenko, Elena V. Babenko, Tatyana L. Gindina, Alexander L. Alyanskiy, Ildar M. Barkhatov, Boris I. Smirnov, Ludmila S. Zubarovskaya, Boris V. Afanasyev
Myelodysplastic syndrome/acute myeloid leukemia evolving from aplastic anemia: Efficacy of hematopoietic stem cell transplantation
Irina K. Golubovskaya, Alexander D. Kulagin, Yulia V. Rudnitskaya, Elena V. Morozova, Anna A.Osipova, Varvara N. Ovechkina, Nikolay Y. Tсvetkov, Sergey N.Bondarenko, *Boris I. Smirnov, Ludmila S. Zubarovskaya, Inna V. Markova, Boris V. Afanasyev
Pair-matched study of cryopreserved versus native graft in adult and pediatric recipients of allogeneic hematopoietic stem cell transplantation
Elena V. Babenko, Ivan S. Moiseev, Mikhail M. Kanunnikov, Alexandr L. Alyanskiy, Dmitrii E. Pevcov, Anastasia V. Frolova, Anna A. Osipova, Tatyana A. Bykova, Olesya V. Paina, Elena I. Darskaya, Ludmila S. Zubarovskaya, Sergey N. Bondarenko, Inna V. Markova, Boris V. Afanasyev
Prognostic significance of BAALC overexpression in patients with AML during the posttransplant period
Alena I. Shakirova, Ildar M. Barkhatov, Anna I. Churkina, Ivan S. Moiseev, Tatiana L. Gindina, Sergey N. Bondarenko, Boris V. Afanasyev
Primary myelodysplastic syndrome with two rare recurrent chromosome abnormalities [t(3q26.2;q22) and trisomy 13] associated with resistance to chemotherapy and hematopoietic stem cell transplantation
Nikolay N. Mamaev, Tatiana L. Gindina, Elena V. Morozova, Yuliya V. Rudnitskaya, Maria V. Gubina, Ildar M. Barkhatov, Sergey N. Bondarenko, Boris V. Afanasyev

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	 Аллогенная трансплантация гемопоэтических клеток (алло-ТГСК) обладает потенциалом излечения пациентов с рецидивирующей и рефрактерной лимфомой Ходжкина (р/р ЛХ). Несмотря на это, рецидив и прогрессирование заболевания в посттрансплантационном периоде происходит у значимой части пациентов. Ниволумаб представляет собой препарат моноклональных антител, блокирующих рецептор программируемой гибели 1 (PD-1), который показал высокую эффективность у пациентов с р/р ЛХ перед и после алло-ТГСК. Мы ретроспективно оценили эффективность и токсичность терапии ниволумабом в монорежиме у 7 пациентов с рецидивами ЛХ после алло-ТГСК в различных режимах дозирования (0,5-3 мг/кг) с кратностью введения каждые 2 недели. В нашей группе не было отмечено случаев возникновения РТПХ на фоне лечения ниволумабом. Вне зависимости от режима дозирования, объективный ответ на терапию отмечен у всех пациентов (100%). Полный метаболический ответ наблюдался у двух пациентов (28.6%) с режимом дозирования 0.5 и 1 мг/кг. Во время лечения ниволумабом у 3/7 (42,9%) пациентов наблюдались иммунные нежелательные явления (НЯ) 3-4 степени тяжести. Тяжелые НЯ отмечались у пациентов с различными режимами дозирования (0,5; 1 или 3 мг/кг. Отмечался полный регресс НЯ на фоне терапии люкокортикостероидами. Все пациенты были живы на момент анализа. У 4/7 пациентов отмечался рецидив заболевания через 7 (5-9) месяцев после начала терапии ниволумабом. Таким образом, ниволумаб может быть эффективным терапевтическим подходом у пациентов с рецидивом ЛХ после алло-ТГСК, с риском проявления иммунной токсичности в ряде случаев.
</p>
<h2 style="text-align: justify;">Ключевые слова</h2>
<p style="text-align: justify;">
	 Лимфома Ходжкина, аллогенная трансплантация гемопоэтических клеток, рецидив, ингибиторы контрольных точек, ниволумаб, дозировка.
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Аллогенная трансплантация гемопоэтических клеток (алло-ТГСК) обладает потенциалом излечения пациентов с рецидивирующей и рефрактерной лимфомой Ходжкина (р/р ЛХ). Несмотря на это, рецидив и прогрессирование заболевания в посттрансплантационном периоде происходит у значимой части пациентов. Ниволумаб представляет собой препарат моноклональных антител, блокирующих рецептор программируемой гибели 1 (PD-1), который показал высокую эффективность у пациентов с р/р ЛХ перед и после алло-ТГСК. Мы ретроспективно оценили эффективность и токсичность терапии ниволумабом в монорежиме у 7 пациентов с рецидивами ЛХ после алло-ТГСК в различных режимах дозирования (0,5-3 мг/кг) с кратностью введения каждые 2 недели. В нашей группе не было отмечено случаев возникновения РТПХ на фоне лечения ниволумабом. Вне зависимости от режима дозирования, объективный ответ на терапию отмечен у всех пациентов (100%). Полный метаболический ответ наблюдался у двух пациентов (28.6%) с режимом дозирования 0.5 и 1 мг/кг. Во время лечения ниволумабом у 3/7 (42,9%) пациентов наблюдались иммунные нежелательные явления (НЯ) 3-4 степени тяжести. Тяжелые НЯ отмечались у пациентов с различными режимами дозирования (0,5; 1 или 3 мг/кг. Отмечался полный регресс НЯ на фоне терапии люкокортикостероидами. Все пациенты были живы на момент анализа. У 4/7 пациентов отмечался рецидив заболевания через 7 (5-9) месяцев после начала терапии ниволумабом. Таким образом, ниволумаб может быть эффективным терапевтическим подходом у пациентов с рецидивом ЛХ после алло-ТГСК, с риском проявления иммунной токсичности в ряде случаев.

Ключевые слова

Лимфома Ходжкина, аллогенная трансплантация гемопоэтических клеток, рецидив, ингибиторы контрольных точек, ниволумаб, дозировка.

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However, relapse and progression of disease in the post-transplant period may occur in a substantial number of patients. nivolumab, an antibody blocking the programmed cell death receptor 1 (PD-1) has shown high efficiency in patients with HL in pre- and post-allo-HSCT setting. We have retrospectively assessed efficacy and toxicity of nivolumab as a single agent in seven HL patients relapsing after allo-HSCT using the drug at different doses (0.5 to 3 mg/kg body mass) administered every 2 weeks. We did not observe any cases of graft-versus-host disease (GVHD) after nivolumab initiation. An objective clinical response to the therapy was noted in all patients (100%), at any dosing regimen. Complete metabolic response, as detected by PET/CT, was observed in two patients (28.6%) treated at 0.5 and 1 mg/kg. Three patients of seven (42.9%) experienced grade 3-4 grade adverse events (AEs) from nivolumab, which included immune disorders. 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Allogeneic hematopoietic cell transplantation (alloHSCT) is a potentially curative treatment for patients with relapsed and refractory Hodgkin lymphoma (HL) followed by long-term survival. However, relapse and progression of disease in the post-transplant period may occur in a substantial number of patients. nivolumab, an antibody blocking the programmed cell death receptor 1 (PD-1) has shown high efficiency in patients with HL in pre- and post-allo-HSCT setting. We have retrospectively assessed efficacy and toxicity of nivolumab as a single agent in seven HL patients relapsing after allo-HSCT using the drug at different doses (0.5 to 3 mg/kg body mass) administered every 2 weeks. We did not observe any cases of graft-versus-host disease (GVHD) after nivolumab initiation. An objective clinical response to the therapy was noted in all patients (100%), at any dosing regimen. Complete metabolic response, as detected by PET/CT, was observed in two patients (28.6%) treated at 0.5 and 1 mg/kg. Three patients of seven (42.9%) experienced grade 3-4 grade adverse events (AEs) from nivolumab, which included immune disorders. There was no correlation with nivolumab dosing regimen since severe AEs were documented in patients treated at 0.5, 1, or 3 mg/kg. All the patients are alive by the time of evaluation, 4/7 patients had the disease relapse at a median of 7 months (5 to 9) after initiation of the treatment. nivolumab may represent an efficient therapeutic tool in patients with HL relapse after allo-HSCT, however, followed by a considerable toxicity in some cases.

Keywords

Hodgkin’s lymphoma, allo-HSCT, relapse, immune checkpoints inhibitors, nivolumab, dosage.

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Safety and efficacy of nivolumab applied at different dosage in the patients with relapsing Hodgkin lymphoma after allogeneic hematopoietic stem cell transplantation

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Kirill V. Lepik, Andrey V. Kozlov, Evgeniya S. Borzenkova, Marina O. Popova, Ivan S. Moiseev, Elena I. Darskaya, Asmik G. Gevorgyan, Luibov A. Tsvetkova, Sergey N. Bondarenko, Alexander L. Alyanskiy, Elena V. Kondakova, Natalya B. Mikhailova, Boris V. Afanasyev

R. M. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, Chair of Hematology, Transfusiology and Transplantology, The First St. Petersburg State I. P. Pavlov Medical University, Roentgen St. 12; 197022, St. Petersburg,Russia

Allogeneic hematopoietic cell transplantation (alloHSCT) is a potentially curative treatment for patients with relapsed and refractory Hodgkin lymphoma (HL) followed by long-term survival. However, relapse and progression of disease in the post-transplant period may occur in a substantial number of patients. nivolumab, an antibody blocking the programmed cell death receptor 1 (PD-1) has shown high efficiency in patients with HL in pre- and post-allo-HSCT setting. We have retrospectively assessed efficacy and toxicity of nivolumab as a single agent in seven HL patients relapsing after allo-HSCT using the drug at different doses (0.5 to 3 mg/kg body mass) administered every 2 weeks. We did not observe any cases of graft-versus-host disease (GVHD) after nivolumab initiation. An objective clinical response to the therapy was noted in all patients (100%), at any dosing regimen. Complete metabolic response, as detected by PET/CT, was observed in two patients (28.6%) treated at 0.5 and 1 mg/kg. Three patients of seven (42.9%) experienced grade 3-4 grade adverse events (AEs) from nivolumab, which included immune disorders. There was no correlation with nivolumab dosing regimen since severe AEs were documented in patients treated at 0.5, 1, or 3 mg/kg. All the patients are alive by the time of evaluation, 4/7 patients had the disease relapse at a median of 7 months (5 to 9) after initiation of the treatment. nivolumab may represent an efficient therapeutic tool in patients with HL relapse after allo-HSCT, however, followed by a considerable toxicity in some cases.

Keywords

Hodgkin’s lymphoma, allo-HSCT, relapse, immune checkpoints inhibitors, nivolumab, dosage.

Clinical studies

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Первый Санкт-Петербургский государственный медицинский университет им. академика И. П. Павлова Министерства здравоохранения России;
Санкт-Петербургский государственный электротехнический университет «ЛЭТИ», Санкт-Петербург, Россия
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Первый Санкт-Петербургский государственный медицинский университет им. академика И. П. Павлова Министерства здравоохранения России;
Санкт-Петербургский государственный электротехнический университет «ЛЭТИ», Санкт-Петербург, Россия
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	 Гаплоидентичная трансплантация (гапло-ТГСК) эффективный метод лечения пациентов с острыми лейкозами высокой группы риска (ОЛ), не имеющих полностью совместимого по генам HLA-системы родственного донора и неродственного донора в Международном регистре. За десятилетний период в НИИ ДОГиТ им. Р. М. Горбачевой выполнено более 150 аллогенных трансплантаций от гаплоидентичного донора, превалирующая часть, как терапия «спасения» больным в первично-резистентном течении ОЛ и/или резистентном течением рецидива ОЛ.
</p>
<h3 style="text-align: justify;">Цель</h3>
<p style="text-align: justify;">
	 Оценить эффективность гапло-ТГСК у больных с ОЛ высокой группы риска, выполненной в 1 и 2 ремиссии.
</p>
<h3 style="text-align: justify;">Материалы и методы</h3>
<p style="text-align: justify;">
	 106 больных с ОЛ высокой группы риска, медиана возраста 7 лет (от 0 до 18 лет), ОЛЛ – 63 (59,4%), ОМЛ – 43 (40,6%), получивших гапло-ТГСК с декабря 2006 года по декабрь 2016 года. В ремиссии заболевания гапло-ТГСК выполнена у 43 больных (40,6%): в 1й ремиссии – 21 (49%), во 2й – 13 больных (30%), в 3й – 9 (21%). В резистентном течении болезни или рецидиве ОЛ – 63 (59,4%) пациента. МАК «GIAC» 39 человек (36,8%), МАК на основе Бусульфана 12мг/кг и Флюдарабина 150мг/м(2) – 2 (2%), МАК со сниженной токсичностью на основе Треосульфана 42 г/м2 – 6 (5,7%), РИК на основе Мелфалана 140мг/м(2) у 40 (37,7%), РИК с использованием Бусульфана 8мг/кг – 18 (17%). Все больные получили профилактику острой реакции «трансплантата против хозяина» (оРТПХ). Серопрофилактика АТГАМ 60мг/кг – 39 (36,8%), ПТЦф 50мг/кг Д+3, Д+4 – 67 (63,2%). Базовая ИСТ: такролимус 47 (44,3%), циклоспорин А в 59 (55,7%) случаях. Источник трансплантата ГСК праймированный КМ и ПСКК, в комбинации – 27 (25,5%) и гапло-КМ – 79 (74,5%). Клеточность трансплантата КМ по CD34+x106/кг от 1 до 9х10<sup>6</sup>/кг (медиана 5,9х10<sup>6</sup>/кг), клеточность КМ+ПСКК от 2,5 до 30,9х10<sup>6</sup>/ кг (медиана 5,9х10<sup>6</sup>/кг). Статистический анализ: SPSS Statistics v.17. Выживаемость и кумулятивная веро ятность анализированы по методу Каплана-Майера. Пациенты, живущие в ремиссии на момент анализа данных, цензурированы 01.01.2018 года. Сравнение ОВ выполнялось при помощи log-rang теста, сравнительный анализ разности долей – точного теста Fisher. Статистически значимыми считались различия при p&lt;0,05.
</p>
<h3 style="text-align: justify;">Результаты</h3>
<p style="text-align: justify;">
	 Приживление трансплантата после гало-ТГСК зафиксировано у 80 (75,7%) реципиентов. Медиана приживления составила Д+24 (Д+14 – Д+34). Первичное неприживление трансплантата зафиксировано у 26 (24,5%) пациентов по причине химиорезистентности и резистентного течения рецидива ОЛ. Медианы восстановления: гранулоциты (&gt;0,5x10<sup>6</sup>/л) Д+21 (Д+10 – Д+47), лейкоциты (&gt;1,0 x109/л) Д+20 (Д+10 – Д+47), тромбоциты (&gt;20x10<sup>6</sup>/л) Д+20 (Д+10 – Д+72), лимфоциты (&gt;30x10<sup>6</sup>/л) Д+17 (Д+12 – Д+73). Полный донорский химеризм к 30-му дню определялся у 67 (83,8%) пациентов, к 60 дню – у 13 (16,2%). 10-летняя ОВ после гапло – ТГСК – 33,3%. Выживаемость в 1 и 2 ремиссиях составила 64,7% против 18,1% в группе трансплантированных вне ремиссии (р=0,01). Тип ОЛ не повлиял на ОВ 36,5% против 27,9% ОЛЛ и ОМЛ соответственно. Частота развития рецидивов после гапло-ТГСК, выполненной в 1 и 2 ремиссии составила 23,5%, с медианой наступления Д+88 (Д+30 – Д+301). Частота развития оРТПХ II0 – 21 (26,3%) человек, оРТПХ III0-IV0 – 15 (18,6%) человек.
</p>
<h3 style="text-align: justify;">Выводы</h3>
<p style="text-align: justify;">
	 Гапло-ТГСК в 1 и 2 ремиссиях ОЛ, позволяет достигнуть 10-летней ОВ у 64,7% детей, при этом тип острого лейкоза не влияет на исход гапло-ТГСК. Приемлемая частота развития оРТПХ III0-IV0 – 18,6% позволяет рассматривать гапло-ТГСК, как терапию в 1 и 2 ремиссиях ОЛ высокой группы риска. Основным осложнением гапло-ТГСК является рецидив – 23,5% в ранний посттрансплантационный период до Д+100.
</p>
<h2 style="text-align: justify;">Ключевые слова</h2>
<p style="text-align: justify;">
	 Аллогенная трансплантация гемопоэтических клеток, гаплоидентичная, дети, общая выживаемость, рецидивирование, реакция «трансплантат против хозяина».
</p>
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Гаплоидентичная трансплантация (гапло-ТГСК) эффективный метод лечения пациентов с острыми лейкозами высокой группы риска (ОЛ), не имеющих полностью совместимого по генам HLA-системы родственного донора и неродственного донора в Международном регистре. За десятилетний период в НИИ ДОГиТ им. Р. М. Горбачевой выполнено более 150 аллогенных трансплантаций от гаплоидентичного донора, превалирующая часть, как терапия «спасения» больным в первично-резистентном течении ОЛ и/или резистентном течением рецидива ОЛ.

Цель

Оценить эффективность гапло-ТГСК у больных с ОЛ высокой группы риска, выполненной в 1 и 2 ремиссии.

Материалы и методы

106 больных с ОЛ высокой группы риска, медиана возраста 7 лет (от 0 до 18 лет), ОЛЛ – 63 (59,4%), ОМЛ – 43 (40,6%), получивших гапло-ТГСК с декабря 2006 года по декабрь 2016 года. В ремиссии заболевания гапло-ТГСК выполнена у 43 больных (40,6%): в 1й ремиссии – 21 (49%), во 2й – 13 больных (30%), в 3й – 9 (21%). В резистентном течении болезни или рецидиве ОЛ – 63 (59,4%) пациента. МАК «GIAC» 39 человек (36,8%), МАК на основе Бусульфана 12мг/кг и Флюдарабина 150мг/м(2) – 2 (2%), МАК со сниженной токсичностью на основе Треосульфана 42 г/м2 – 6 (5,7%), РИК на основе Мелфалана 140мг/м(2) у 40 (37,7%), РИК с использованием Бусульфана 8мг/кг – 18 (17%). Все больные получили профилактику острой реакции «трансплантата против хозяина» (оРТПХ). Серопрофилактика АТГАМ 60мг/кг – 39 (36,8%), ПТЦф 50мг/кг Д+3, Д+4 – 67 (63,2%). Базовая ИСТ: такролимус 47 (44,3%), циклоспорин А в 59 (55,7%) случаях. Источник трансплантата ГСК праймированный КМ и ПСКК, в комбинации – 27 (25,5%) и гапло-КМ – 79 (74,5%). Клеточность трансплантата КМ по CD34+x106/кг от 1 до 9х106/кг (медиана 5,9х106/кг), клеточность КМ+ПСКК от 2,5 до 30,9х106/ кг (медиана 5,9х106/кг). Статистический анализ: SPSS Statistics v.17. Выживаемость и кумулятивная веро ятность анализированы по методу Каплана-Майера. Пациенты, живущие в ремиссии на момент анализа данных, цензурированы 01.01.2018 года. Сравнение ОВ выполнялось при помощи log-rang теста, сравнительный анализ разности долей – точного теста Fisher. Статистически значимыми считались различия при p<0,05.

Результаты

Приживление трансплантата после гало-ТГСК зафиксировано у 80 (75,7%) реципиентов. Медиана приживления составила Д+24 (Д+14 – Д+34). Первичное неприживление трансплантата зафиксировано у 26 (24,5%) пациентов по причине химиорезистентности и резистентного течения рецидива ОЛ. Медианы восстановления: гранулоциты (>0,5x106/л) Д+21 (Д+10 – Д+47), лейкоциты (>1,0 x109/л) Д+20 (Д+10 – Д+47), тромбоциты (>20x106/л) Д+20 (Д+10 – Д+72), лимфоциты (>30x106/л) Д+17 (Д+12 – Д+73). Полный донорский химеризм к 30-му дню определялся у 67 (83,8%) пациентов, к 60 дню – у 13 (16,2%). 10-летняя ОВ после гапло – ТГСК – 33,3%. Выживаемость в 1 и 2 ремиссиях составила 64,7% против 18,1% в группе трансплантированных вне ремиссии (р=0,01). Тип ОЛ не повлиял на ОВ 36,5% против 27,9% ОЛЛ и ОМЛ соответственно. Частота развития рецидивов после гапло-ТГСК, выполненной в 1 и 2 ремиссии составила 23,5%, с медианой наступления Д+88 (Д+30 – Д+301). Частота развития оРТПХ II0 – 21 (26,3%) человек, оРТПХ III0-IV0 – 15 (18,6%) человек.

Выводы

Гапло-ТГСК в 1 и 2 ремиссиях ОЛ, позволяет достигнуть 10-летней ОВ у 64,7% детей, при этом тип острого лейкоза не влияет на исход гапло-ТГСК. Приемлемая частота развития оРТПХ III0-IV0 – 18,6% позволяет рассматривать гапло-ТГСК, как терапию в 1 и 2 ремиссиях ОЛ высокой группы риска. Основным осложнением гапло-ТГСК является рецидив – 23,5% в ранний посттрансплантационный период до Д+100.

Ключевые слова

Аллогенная трансплантация гемопоэтических клеток, гаплоидентичная, дети, общая выживаемость, рецидивирование, реакция «трансплантат против хозяина».

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Paina, Polina V. Kozhokar, Anastasia S. Borovkova, Anastasia S. Frolova, Kirill A. Ekushov, Tatyana A. Bykova, Zhemal Z. Rakhmanova, Mariya A. Galas, Aigul G. Khabirova, Inna V. Markova, Elena V. Semenova, Sergey N. Bondarenko, Elena V. Babenko, Tatyana L. Gindina, Alexander L. Alyanskiy, Ildar M. Barkhatov, Boris I. Smirnov, Ludmila S. Zubarovskaya, Boris V. Afanasyev [TYPE] => TEXT ) [DESCRIPTION] => [VALUE_ENUM] => [VALUE_XML_ID] => [VALUE_SORT] => [~VALUE] => Array ( [TEXT] => Olesya V. Paina, Polina V. Kozhokar, Anastasia S. Borovkova, Anastasia S. Frolova, Kirill A. Ekushov, Tatyana A. Bykova, Zhemal Z. Rakhmanova, Mariya A. Galas, Aigul G. Khabirova, Inna V. Markova, Elena V. Semenova, Sergey N. Bondarenko, Elena V. Babenko, Tatyana L. Gindina, Alexander L. Alyanskiy, Ildar M. Barkhatov, Boris I. Smirnov, Ludmila S. Zubarovskaya, Boris V. 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During 10 years in R/G/Memorial Institute of children oncology,<br> hematology and transplantation more than 150 patients have Haplo-HSCT. More than 50% of patients were «salvage group» patients. </p> <h3 style="text-align: justify;">Materials and methods</h3> <p style="text-align: justify;"> 106 patients with high-risk AL, median age 7 y.o. (range 0-18), acute lymphoblastic leukemia (ALL) – 63 (59.4%), acute myeloid leukemia (AML) – 43 (40.6%), received Haplo-HSCT from December 2006 till December 2016. Forty three patients (40.6%) recived Haplo-HSCT in complete remission (CR): CR1 21 patients (49%), CR2 – 13 patients (30%), CR3 – 9 patients (21%). Resistance disease or resistance relapse AL – 63 (59.4%) patients. Сonditioning regimens were as follows: MAC «GIAC» 39 patients (36.8%), MAC based on Busulfan 12mg/b.w. and Fludarabine 150 mg/mg(2) – 2 (2%), MAC reduced toxisity based on Treosulfan 42 g/m(2) – 6 (5.7%), RIC based on Melfalan 140 mg/m(2) – 40 (37.7%), RIC with Busulfan 8 mg/b.w. – 18 (17%). All patients received prophylaxis of acute graft versus host disease (aGVHD). Seroprophylaxis with ATG – ATGAM 60mg/b.w. – 39 (36.8%), posttransplant cyclophosphomide 50 mg/b.w. on D+3, D+4 – 67 (63.2%). Conventional immunosuppressive therapy: tacrolimus 47 patients (44.3%), CsA 59 patients (55.7%). Source of transplant – combined unmanipulated stimulated Haplo-bone marrow plus manipulated (positive selected CD34+) stimulated CD34+ cells – 27 patients (25.5%) and unmanipulated stimulated Haplo- bone marrow – 79 (74.5%). Stem cells dose of unmanipulated stimulated Haplo-bone marrow transplant CD34+x106/b.w. median 5.9x10(6)/b.w., stem cells dose of combined transplant median 5.9x10(6)/b.w. (range from 2.5 till 30.9х10(6)/b.w. </p> <h3 style="text-align: justify;">Statistical analysis</h3> <p style="text-align: justify;"> SPSS Statistics v.17. Overal survival (OS) was defined as time from study enrollment to death, with living patients censored on the date of the last follow-up. The Kaplan–Meier method was used to estimate OS rates, and the exact log-rank test was used to compare survival curves. Survival estimates are reported with standard errors determined by the method of Peto and Pike. </p> <h3 style="text-align: justify;">Conclusion</h3> <p style="text-align: justify;"> Haplo-HSCT in 1 and 2 remissions of AL allows to achieve 10-year OS in 64.7% of children, while the type of acute leukemia does not influence the outcome of haplo-HSCT. The acceptable frequency of development of aGVHD III0-IV0 – 18.6% allows to treat haplo-HSCT as therapy in 1 and 2 remissions of high risk group. The main complication of haplo-HSCT is relapse – 23.5% in the early posttransplant period to D + 100. </p> <h3 style="text-align: justify;">Keywords</h3> <p style="text-align: justify;"> Allogeneic hematopoietic stem cell transplantation, haploidentical, children, overall survival, relapse, graftversus- host disease. </p> [TYPE] => HTML ) [DESCRIPTION] => [VALUE_ENUM] => [VALUE_XML_ID] => [VALUE_SORT] => [~VALUE] => Array ( [TEXT] =>

Haploidentical transplantation (Haplo-HSCT) is an effective method for treating patients with high-risk acute leukemias (AL) who do not have HLA-matched related (MRD) and matched unrelated donors (MUD). During 10 years in R/G/Memorial Institute of children oncology,
hematology and transplantation more than 150 patients have Haplo-HSCT. More than 50% of patients were «salvage group» patients.

Materials and methods

106 patients with high-risk AL, median age 7 y.o. (range 0-18), acute lymphoblastic leukemia (ALL) – 63 (59.4%), acute myeloid leukemia (AML) – 43 (40.6%), received Haplo-HSCT from December 2006 till December 2016. Forty three patients (40.6%) recived Haplo-HSCT in complete remission (CR): CR1 21 patients (49%), CR2 – 13 patients (30%), CR3 – 9 patients (21%). Resistance disease or resistance relapse AL – 63 (59.4%) patients. Сonditioning regimens were as follows: MAC «GIAC» 39 patients (36.8%), MAC based on Busulfan 12mg/b.w. and Fludarabine 150 mg/mg(2) – 2 (2%), MAC reduced toxisity based on Treosulfan 42 g/m(2) – 6 (5.7%), RIC based on Melfalan 140 mg/m(2) – 40 (37.7%), RIC with Busulfan 8 mg/b.w. – 18 (17%). All patients received prophylaxis of acute graft versus host disease (aGVHD). Seroprophylaxis with ATG – ATGAM 60mg/b.w. – 39 (36.8%), posttransplant cyclophosphomide 50 mg/b.w. on D+3, D+4 – 67 (63.2%). Conventional immunosuppressive therapy: tacrolimus 47 patients (44.3%), CsA 59 patients (55.7%). Source of transplant – combined unmanipulated stimulated Haplo-bone marrow plus manipulated (positive selected CD34+) stimulated CD34+ cells – 27 patients (25.5%) and unmanipulated stimulated Haplo- bone marrow – 79 (74.5%). Stem cells dose of unmanipulated stimulated Haplo-bone marrow transplant CD34+x106/b.w. median 5.9x10(6)/b.w., stem cells dose of combined transplant median 5.9x10(6)/b.w. (range from 2.5 till 30.9х10(6)/b.w.

Statistical analysis

SPSS Statistics v.17. Overal survival (OS) was defined as time from study enrollment to death, with living patients censored on the date of the last follow-up. The Kaplan–Meier method was used to estimate OS rates, and the exact log-rank test was used to compare survival curves. Survival estimates are reported with standard errors determined by the method of Peto and Pike.

Conclusion

Haplo-HSCT in 1 and 2 remissions of AL allows to achieve 10-year OS in 64.7% of children, while the type of acute leukemia does not influence the outcome of haplo-HSCT. The acceptable frequency of development of aGVHD III0-IV0 – 18.6% allows to treat haplo-HSCT as therapy in 1 and 2 remissions of high risk group. The main complication of haplo-HSCT is relapse – 23.5% in the early posttransplant period to D + 100.

Keywords

Allogeneic hematopoietic stem cell transplantation, haploidentical, children, overall survival, relapse, graftversus- host disease.

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Ten-year experience of allogeneic haploidentical hematopoietic stem cell transplantation with non-manipulated grafts in children and adolescents with high-risk acute leukemia

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Olesya V. Paina, Polina V. Kozhokar, Anastasia S. Borovkova, Anastasia S. Frolova, Kirill A. Ekushov, Tatyana A. Bykova, Zhemal Z. Rakhmanova, Mariya A. Galas, Aigul G. Khabirova, Inna V. Markova, Elena V. Semenova, Sergey N. Bondarenko, Elena V. Babenko, Tatyana L. Gindina, Alexander L. Alyanskiy, Ildar M. Barkhatov, Boris I. Smirnov, Ludmila S. Zubarovskaya, Boris V. Afanasyev

R. Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantology at the First St. Petersburg State I. Pavlov Medical University; St. Petersburg State Electrotechnical University «LETI», St. Petersburg, Russia

Haploidentical transplantation (Haplo-HSCT) is an effective method for treating patients with high-risk acute leukemias (AL) who do not have HLA-matched related (MRD) and matched unrelated donors (MUD). During 10 years in R/G/Memorial Institute of children oncology,
hematology and transplantation more than 150 patients have Haplo-HSCT. More than 50% of patients were «salvage group» patients.

Materials and methods

106 patients with high-risk AL, median age 7 y.o. (range 0-18), acute lymphoblastic leukemia (ALL) – 63 (59.4%), acute myeloid leukemia (AML) – 43 (40.6%), received Haplo-HSCT from December 2006 till December 2016. Forty three patients (40.6%) recived Haplo-HSCT in complete remission (CR): CR1 21 patients (49%), CR2 – 13 patients (30%), CR3 – 9 patients (21%). Resistance disease or resistance relapse AL – 63 (59.4%) patients. Сonditioning regimens were as follows: MAC «GIAC» 39 patients (36.8%), MAC based on Busulfan 12mg/b.w. and Fludarabine 150 mg/mg(2) – 2 (2%), MAC reduced toxisity based on Treosulfan 42 g/m(2) – 6 (5.7%), RIC based on Melfalan 140 mg/m(2) – 40 (37.7%), RIC with Busulfan 8 mg/b.w. – 18 (17%). All patients received prophylaxis of acute graft versus host disease (aGVHD). Seroprophylaxis with ATG – ATGAM 60mg/b.w. – 39 (36.8%), posttransplant cyclophosphomide 50 mg/b.w. on D+3, D+4 – 67 (63.2%). Conventional immunosuppressive therapy: tacrolimus 47 patients (44.3%), CsA 59 patients (55.7%). Source of transplant – combined unmanipulated stimulated Haplo-bone marrow plus manipulated (positive selected CD34+) stimulated CD34+ cells – 27 patients (25.5%) and unmanipulated stimulated Haplo- bone marrow – 79 (74.5%). Stem cells dose of unmanipulated stimulated Haplo-bone marrow transplant CD34+x106/b.w. median 5.9x10(6)/b.w., stem cells dose of combined transplant median 5.9x10(6)/b.w. (range from 2.5 till 30.9х10(6)/b.w.

Statistical analysis

SPSS Statistics v.17. Overal survival (OS) was defined as time from study enrollment to death, with living patients censored on the date of the last follow-up. The Kaplan–Meier method was used to estimate OS rates, and the exact log-rank test was used to compare survival curves. Survival estimates are reported with standard errors determined by the method of Peto and Pike.

Conclusion

Haplo-HSCT in 1 and 2 remissions of AL allows to achieve 10-year OS in 64.7% of children, while the type of acute leukemia does not influence the outcome of haplo-HSCT. The acceptable frequency of development of aGVHD III0-IV0 – 18.6% allows to treat haplo-HSCT as therapy in 1 and 2 remissions of high risk group. The main complication of haplo-HSCT is relapse – 23.5% in the early posttransplant period to D + 100.

Keywords

Allogeneic hematopoietic stem cell transplantation, haploidentical, children, overall survival, relapse, graftversus- host disease.

Clinical studies

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	 Апластическая анемия (АА) наиболее частый встречаемый вариант костно-мозговой недостаточности, рассматриваемый как незлокачественное заболевание. Тем не менее, во многих исследованиях подтверждено развитие вторичного миелодиспластического синдрома и острого миелоидного лейкоза (МДС/ОМЛ) у долгоживущих пациентов с АА. Лечение пациентов с вторичным МДС/ОМЛ остается нерешенной проблемой. Целью данного исследования являлась оценка эффективности аллогенной трансплантации гемопоэтических стволовых клеток (алло-ТГСК) при развитии вторичного МДС/ОМЛ из АА и выявление факторов, оказывающих влияние на клинические исходы лечения. В исследование было включено 26 пациентов с МДС/ОМЛ,ранее получавших иммуносупрессивную терапию в рамках лечения приобретенной АА. Медиана возраста на момент установления диагноза МДС/ОМЛ составила 25 лет (9-45). Восемь пациентов, не имевших доступного совместимого донора, получали только химиотерапию, 18 пациентов получили алло-ТГСК (от полностью совместимого родственного донора (n=6), полностью совместимого неродственного донора (n=9), гаплоидентичного донора (n=3). Двухлетняя общая выживаемость (ОВ) в группе пациентов, получавших только химиотерапию, составила 0 % с равнение с 53,1% ((95% ДИ 41-65,2), p=0,024) ОВ в группе пациентов после алло-ТГСК. Для пациентов, получивших ТГСК в ремиссии заболевания ОВ, составляла 80% ((95% ДИ, 65-95), p=0,021) против 27% ОВ среди пациентов, не достигших ремиссии к моменту алло-ТГСК. Использование периферической крови в качестве источника трансплантата было ассоциировано с более высокой ОВ (р=0,014). Алло-ТГСК остается единственным потенциально излечивающим методом лечения для пациентов с вторичным МДС/ОМЛ из АА, и должна по возможности выполняться в самые кратчайшие сроки после констатации перехода АА в МДС/ОМЛ. Ремиссионный статус на момент алло-ТГСК является главным предиктором успешной трансплантации.
</p>
<h2 style="text-align: justify;">Ключевые слова</h2>
<p style="text-align: justify;">
	 Апластическая анемия, миелодиспластический синдром, острый миелоидный лейкоз, трансплантация гемопоэтических стволовых клеток.
</p>
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Апластическая анемия (АА) наиболее частый встречаемый вариант костно-мозговой недостаточности, рассматриваемый как незлокачественное заболевание. Тем не менее, во многих исследованиях подтверждено развитие вторичного миелодиспластического синдрома и острого миелоидного лейкоза (МДС/ОМЛ) у долгоживущих пациентов с АА. Лечение пациентов с вторичным МДС/ОМЛ остается нерешенной проблемой. Целью данного исследования являлась оценка эффективности аллогенной трансплантации гемопоэтических стволовых клеток (алло-ТГСК) при развитии вторичного МДС/ОМЛ из АА и выявление факторов, оказывающих влияние на клинические исходы лечения. В исследование было включено 26 пациентов с МДС/ОМЛ,ранее получавших иммуносупрессивную терапию в рамках лечения приобретенной АА. Медиана возраста на момент установления диагноза МДС/ОМЛ составила 25 лет (9-45). Восемь пациентов, не имевших доступного совместимого донора, получали только химиотерапию, 18 пациентов получили алло-ТГСК (от полностью совместимого родственного донора (n=6), полностью совместимого неродственного донора (n=9), гаплоидентичного донора (n=3). Двухлетняя общая выживаемость (ОВ) в группе пациентов, получавших только химиотерапию, составила 0 % с равнение с 53,1% ((95% ДИ 41-65,2), p=0,024) ОВ в группе пациентов после алло-ТГСК. Для пациентов, получивших ТГСК в ремиссии заболевания ОВ, составляла 80% ((95% ДИ, 65-95), p=0,021) против 27% ОВ среди пациентов, не достигших ремиссии к моменту алло-ТГСК. Использование периферической крови в качестве источника трансплантата было ассоциировано с более высокой ОВ (р=0,014). Алло-ТГСК остается единственным потенциально излечивающим методом лечения для пациентов с вторичным МДС/ОМЛ из АА, и должна по возможности выполняться в самые кратчайшие сроки после констатации перехода АА в МДС/ОМЛ. Ремиссионный статус на момент алло-ТГСК является главным предиктором успешной трансплантации.

Ключевые слова

Апластическая анемия, миелодиспластический синдром, острый миелоидный лейкоз, трансплантация гемопоэтических стволовых клеток.

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Golubovskaya, Alexander D. Kulagin, Yulia V. Rudnitskaya, Elena V. Morozova, Anna A.Osipova, Varvara N. Ovechkina, Nikolay Y. Tсvetkov, Sergey N.Bondarenko, *Boris I. Smirnov, Ludmila S. Zubarovskaya, Inna V. Markova, Boris V. Afanasyev [TYPE] => HTML ) [DESCRIPTION] => [VALUE_ENUM] => [VALUE_XML_ID] => [VALUE_SORT] => [~VALUE] => Array ( [TEXT] => Irina K. Golubovskaya, Alexander D. Kulagin, Yulia V. Rudnitskaya, Elena V. Morozova, Anna A.Osipova, Varvara N. Ovechkina, Nikolay Y. Tсvetkov, Sergey N.Bondarenko, *Boris I. Smirnov, Ludmila S. Zubarovskaya, Inna V. Markova, Boris V. 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Pavlov Medical University *St. Petersburg State Electrotechnical University «LETI», St. Petersburg, Russia [TYPE] => HTML ) [DESCRIPTION] => [VALUE_ENUM] => [VALUE_XML_ID] => [VALUE_SORT] => [~VALUE] => Array ( [TEXT] => R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, Chair of Hematology, Transfusiology and Transplantology at The First St. Petersburg State I. Pavlov Medical University *St. Petersburg State Electrotechnical University «LETI», St. Petersburg, Russia [TYPE] => HTML ) [~DESCRIPTION] => [~NAME] => Organization [~DEFAULT_VALUE] => Array ( [TEXT] => [TYPE] => HTML ) ) [SUMMARY_EN] => Array ( [ID] => 39 [TIMESTAMP_X] => 2015-09-02 18:02:59 [IBLOCK_ID] => 2 [NAME] => Description / Summary [ACTIVE] => Y [SORT] => 500 [CODE] => SUMMARY_EN [DEFAULT_VALUE] => Array ( [TEXT] => [TYPE] => HTML ) [PROPERTY_TYPE] => S [ROW_COUNT] => 1 [COL_COUNT] => 30 [LIST_TYPE] => L [MULTIPLE] => N [XML_ID] => 39 [FILE_TYPE] => [MULTIPLE_CNT] => 5 [TMP_ID] => [LINK_IBLOCK_ID] => 0 [WITH_DESCRIPTION] => N [SEARCHABLE] => N [FILTRABLE] => N [IS_REQUIRED] => N [VERSION] => 1 [USER_TYPE] => HTML [USER_TYPE_SETTINGS] => Array ( [height] => 200 ) [HINT] => [PROPERTY_VALUE_ID] => 20215 [VALUE] => Array ( [TEXT] => <p style="text-align: justify;"> Aplastic anemia (АА) is the most common clinical form of bone marrow failure which is still considered as a non-malignant disorder. However, development secondary myelodysplastic syndrome and acute myeloid leukemia (MDS/AML) in long-term AA survivors is confirmed by numerous studies. Treatment of the patients with secondary MDS/AML remains unresolved problem. The aim of present study was to evaluate efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in secondary MDS/AML evolving from AA, and to determine the factors influencing clinical outcomes. The study included 26 patients with MDS/AML, previously treated with immunosuppressive treatment due to acquired AA. Median age was 25 (range, 9-45) years at the moment of MDS/AML diagnosis. Eight patients who had no available compatible donors, received chemotherapy alone, 18 patients received allo-HSCT (from matched related donor (n=6), matched unrelated donor (n=9), haploidentical donor (n=3)). Groups were comparable in pre-transplant characteristics of patients. The 2-year overall survival (OS) in the chemotherapy alone group was 0%, being 53.1% in HSCT group [(95% CI 41-65.2), p=0.024]. For the patients being in remission state at the time of allo-HSCT, the 4-year OS comprised 80% [(95% CI, 65-95), p=0.021] vs 27 % in non-remission group. The use of peripheral blood as a source of graft was associated with higher OS (p=0.014). Allo-HSCT remains the only potentially curative method for treatment of secondary MDS/AML from AA and should be performed as soon as possible in the case of registered evolution of AA to MDS/AML. Remission state at the time of allo-HSCT is the main predictor for a successful transplantation. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Aplastic anemia, myelodysplastic syndrome, acute myeloid leukemia, hematopoietic stem cell transplantation. </p> [TYPE] => HTML ) [DESCRIPTION] => [VALUE_ENUM] => [VALUE_XML_ID] => [VALUE_SORT] => [~VALUE] => Array ( [TEXT] =>

Aplastic anemia (АА) is the most common clinical form of bone marrow failure which is still considered as a non-malignant disorder. However, development secondary myelodysplastic syndrome and acute myeloid leukemia (MDS/AML) in long-term AA survivors is confirmed by numerous studies. Treatment of the patients with secondary MDS/AML remains unresolved problem. The aim of present study was to evaluate efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in secondary MDS/AML evolving from AA, and to determine the factors influencing clinical outcomes. The study included 26 patients with MDS/AML, previously treated with immunosuppressive treatment due to acquired AA. Median age was 25 (range, 9-45) years at the moment of MDS/AML diagnosis. Eight patients who had no available compatible donors, received chemotherapy alone, 18 patients received allo-HSCT (from matched related donor (n=6), matched unrelated donor (n=9), haploidentical donor (n=3)). Groups were comparable in pre-transplant characteristics of patients. The 2-year overall survival (OS) in the chemotherapy alone group was 0%, being 53.1% in HSCT group [(95% CI 41-65.2), p=0.024]. For the patients being in remission state at the time of allo-HSCT, the 4-year OS comprised 80% [(95% CI, 65-95), p=0.021] vs 27 % in non-remission group. The use of peripheral blood as a source of graft was associated with higher OS (p=0.014). Allo-HSCT remains the only potentially curative method for treatment of secondary MDS/AML from AA and should be performed as soon as possible in the case of registered evolution of AA to MDS/AML. Remission state at the time of allo-HSCT is the main predictor for a successful transplantation.

Keywords

Aplastic anemia, myelodysplastic syndrome, acute myeloid leukemia, hematopoietic stem cell transplantation.

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Myelodysplastic syndrome/acute myeloid leukemia evolving from aplastic anemia: Efficacy of hematopoietic stem cell transplantation

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Irina K. Golubovskaya, Alexander D. Kulagin, Yulia V. Rudnitskaya, Elena V. Morozova, Anna A.Osipova, Varvara N. Ovechkina, Nikolay Y. Tсvetkov, Sergey N.Bondarenko, *Boris I. Smirnov, Ludmila S. Zubarovskaya, Inna V. Markova, Boris V. Afanasyev

R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, Chair of Hematology, Transfusiology and Transplantology at The First St. Petersburg State I. Pavlov Medical University *St. Petersburg State Electrotechnical University «LETI», St. Petersburg, Russia

Aplastic anemia (АА) is the most common clinical form of bone marrow failure which is still considered as a non-malignant disorder. However, development secondary myelodysplastic syndrome and acute myeloid leukemia (MDS/AML) in long-term AA survivors is confirmed by numerous studies. Treatment of the patients with secondary MDS/AML remains unresolved problem. The aim of present study was to evaluate efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in secondary MDS/AML evolving from AA, and to determine the factors influencing clinical outcomes. The study included 26 patients with MDS/AML, previously treated with immunosuppressive treatment due to acquired AA. Median age was 25 (range, 9-45) years at the moment of MDS/AML diagnosis. Eight patients who had no available compatible donors, received chemotherapy alone, 18 patients received allo-HSCT (from matched related donor (n=6), matched unrelated donor (n=9), haploidentical donor (n=3)). Groups were comparable in pre-transplant characteristics of patients. The 2-year overall survival (OS) in the chemotherapy alone group was 0%, being 53.1% in HSCT group [(95% CI 41-65.2), p=0.024]. For the patients being in remission state at the time of allo-HSCT, the 4-year OS comprised 80% [(95% CI, 65-95), p=0.021] vs 27 % in non-remission group. The use of peripheral blood as a source of graft was associated with higher OS (p=0.014). Allo-HSCT remains the only potentially curative method for treatment of secondary MDS/AML from AA and should be performed as soon as possible in the case of registered evolution of AA to MDS/AML. Remission state at the time of allo-HSCT is the main predictor for a successful transplantation.

Keywords

Aplastic anemia, myelodysplastic syndrome, acute myeloid leukemia, hematopoietic stem cell transplantation.

Clinical studies

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	 Криоконсервация (Крио) трансплантата является неотъемлемой частью процедуры аутологичной трансплантации гемопоэтических стволовых клеток (ТГСК), тем не менее, в литературе крайне мало данных о безопасности и эффективности аллогенной ТГСК после стадии замораживания. Для определения клинического значения криоконсервации трансплантата было проведено исследование методом парных сравнений между 81 пациентом, получившим инфузию замороженного аллогенного трансплантата, и 81 пациентом, получившим инфузию нативного трансплантата. Критериями парного подбора были вариант и стадия заболевания, тип донора, источник трансплантата, возраст пациента, интенсивность кондиционирования, профилактика реакции «трансплантат против хозяина» (РТПХ) и количество CD34-положительных клеток в трансплантате. В исследуемой группе 83% выполнена неродственная ТГСК, 72% получили инфузию стволовых клеток периферической крови и 40% относились к группе «спасения». При сравнении группы Крио и контрольной группы не было выявлено различий в частоте острой РТПХ II-IV степени (39% vs 37%, p=0,89), средней и тяжелой хронической РТПХ (29% vs 30%, p=0,39), общей выживаемости (37% vs 44%, p=0,24), бессобытийной выживаемости (35% vs 40%, p=0,38) и выживаемости без рецидива и РТПХ (19% vs 25% , p=0,20), соответственно. Тем не менее, трансплантационная летальность (ТЛ) была значимо выше в группе Крио (45% vs 28%, p=0,015), что частично компенсировалось снижением вероятности рецидива (21% vs 34%, p=0,048). Основной причиной повышения ТЛ был тренд к большей частоте первичного неприживления трансплантата (15,7% vs 6.3%, p=0,059) и сепсиса в период аплазии кроветворения (24% vs 13%, p=0,068). Различий в скорости приживления нейтрофилов и тромбоцитов выявлено не было. Частота осложнений трансплантации была сравнима в двух группах, за исключением повышения вероятности развития нефротоксичности II-IV степени в группе криоконсервации (30% vs 10%, p=0,0046). В заключение можно сказать, что исследование показало сравнимые результаты при использовании замороженного и нативного трансплантата. Выявленное повышение частоты первичного неприживления трансплантата, сепсиса и трансплантационной летальности требуют подтверждения в многоцентровых исследованиях.
</p>
<h2 style="text-align: justify;">Ключевые слова</h2>
<p style="text-align: justify;">
	 Трансплантация гемопоэтических стволовых клеток, аллогенная, криоконсервирование трансплантата, замораживание трансплантата, первичное неприживление трансплантата.
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Криоконсервация (Крио) трансплантата является неотъемлемой частью процедуры аутологичной трансплантации гемопоэтических стволовых клеток (ТГСК), тем не менее, в литературе крайне мало данных о безопасности и эффективности аллогенной ТГСК после стадии замораживания. Для определения клинического значения криоконсервации трансплантата было проведено исследование методом парных сравнений между 81 пациентом, получившим инфузию замороженного аллогенного трансплантата, и 81 пациентом, получившим инфузию нативного трансплантата. Критериями парного подбора были вариант и стадия заболевания, тип донора, источник трансплантата, возраст пациента, интенсивность кондиционирования, профилактика реакции «трансплантат против хозяина» (РТПХ) и количество CD34-положительных клеток в трансплантате. В исследуемой группе 83% выполнена неродственная ТГСК, 72% получили инфузию стволовых клеток периферической крови и 40% относились к группе «спасения». При сравнении группы Крио и контрольной группы не было выявлено различий в частоте острой РТПХ II-IV степени (39% vs 37%, p=0,89), средней и тяжелой хронической РТПХ (29% vs 30%, p=0,39), общей выживаемости (37% vs 44%, p=0,24), бессобытийной выживаемости (35% vs 40%, p=0,38) и выживаемости без рецидива и РТПХ (19% vs 25% , p=0,20), соответственно. Тем не менее, трансплантационная летальность (ТЛ) была значимо выше в группе Крио (45% vs 28%, p=0,015), что частично компенсировалось снижением вероятности рецидива (21% vs 34%, p=0,048). Основной причиной повышения ТЛ был тренд к большей частоте первичного неприживления трансплантата (15,7% vs 6.3%, p=0,059) и сепсиса в период аплазии кроветворения (24% vs 13%, p=0,068). Различий в скорости приживления нейтрофилов и тромбоцитов выявлено не было. Частота осложнений трансплантации была сравнима в двух группах, за исключением повышения вероятности развития нефротоксичности II-IV степени в группе криоконсервации (30% vs 10%, p=0,0046). В заключение можно сказать, что исследование показало сравнимые результаты при использовании замороженного и нативного трансплантата. Выявленное повышение частоты первичного неприживления трансплантата, сепсиса и трансплантационной летальности требуют подтверждения в многоцентровых исследованиях.

Ключевые слова

Трансплантация гемопоэтических стволовых клеток, аллогенная, криоконсервирование трансплантата, замораживание трансплантата, первичное неприживление трансплантата.

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Cryopreservation (Cryo) of a graft is a standard procedure in autologous hematopoietic stem cell transplantation (HSCT), however there is a lack of studies on the safety and efficacy of allogeneic HSCT with cryopreserved graft. We have conducted a pair-matched study in 81 patients transplanted with frozen graft and compared them to 81 control patients with fresh cell graft. The groups were matched by age, disease type and stage, conditioning, donor type, graft-versus-host disease (GVHD) prophylaxis and number of CD34-postive cells in the graft. The study group comprised 83% unrelated HSCTs, 72% of peripheral blood stem cell recipients and 40% of salvage patients. No differences were observed between the Cryo and control group in the incidence of grade II-IV acute GVHD (39% vs 37%, p=0.89), moderate and severe chronic GVHD (29% vs 30%, p=0.39), overall survival (37% vs 44%, p=0.24), event-free survival (35% vs 40%, p=0.38) and GVHD-relapse-free survival (19% vs 25% , p=0.20), respectively. However, non-relapse mortality (NRM) was significantly higher in the Cryo group (45% vs 28%, p=0.015), which was compensated by reduced relapse incidence (21% vs 34%, p=0.048). The leading factor for NRM were trends to higher incidence of primary graft failure (15,7% vs 6.3%, p=0.059) and sepsis during aplasia (24% vs 13%, p=0.068). No differences were observed in the time to neutrophil and platelet engraftment. Complications of HSCT were comparable between groups except higher incidence of grade II-IV nephrotoxicity in the Cryo group (30% vs 10%, p=0.0046). In conclusion, the study demonstrated that the results of allogeneic HSCT with cryopreserved graft are comparable to native graft ones. Trends to higher primary graft failure, infectious complications and NRM should be confirmed in the multicenter studies.

Keywords

Hematopoietic stem cell transplantation, allogeneic, cryopreservation, freezing, primary graft failure.

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Pair-matched study of cryopreserved versus native graft in adult and pediatric recipients of allogeneic hematopoietic stem cell transplantation

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Elena V. Babenko, Ivan S. Moiseev, Mikhail M. Kanunnikov, Alexandr L. Alyanskiy, Dmitrii E. Pevcov, Anastasia V. Frolova, Anna A. Osipova, Tatyana A. Bykova, Olesya V. Paina, Elena I. Darskaya, Ludmila S. Zubarovskaya, Sergey N. Bondarenko, Inna V. Markova, Boris V. Afanasyev

R. Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, The First St. Petersburg State I. Pavlov Medical University, St. Petersburg, Russia

Cryopreservation (Cryo) of a graft is a standard procedure in autologous hematopoietic stem cell transplantation (HSCT), however there is a lack of studies on the safety and efficacy of allogeneic HSCT with cryopreserved graft. We have conducted a pair-matched study in 81 patients transplanted with frozen graft and compared them to 81 control patients with fresh cell graft. The groups were matched by age, disease type and stage, conditioning, donor type, graft-versus-host disease (GVHD) prophylaxis and number of CD34-postive cells in the graft. The study group comprised 83% unrelated HSCTs, 72% of peripheral blood stem cell recipients and 40% of salvage patients. No differences were observed between the Cryo and control group in the incidence of grade II-IV acute GVHD (39% vs 37%, p=0.89), moderate and severe chronic GVHD (29% vs 30%, p=0.39), overall survival (37% vs 44%, p=0.24), event-free survival (35% vs 40%, p=0.38) and GVHD-relapse-free survival (19% vs 25% , p=0.20), respectively. However, non-relapse mortality (NRM) was significantly higher in the Cryo group (45% vs 28%, p=0.015), which was compensated by reduced relapse incidence (21% vs 34%, p=0.048). The leading factor for NRM were trends to higher incidence of primary graft failure (15,7% vs 6.3%, p=0.059) and sepsis during aplasia (24% vs 13%, p=0.068). No differences were observed in the time to neutrophil and platelet engraftment. Complications of HSCT were comparable between groups except higher incidence of grade II-IV nephrotoxicity in the Cryo group (30% vs 10%, p=0.0046). In conclusion, the study demonstrated that the results of allogeneic HSCT with cryopreserved graft are comparable to native graft ones. Trends to higher primary graft failure, infectious complications and NRM should be confirmed in the multicenter studies.

Keywords

Hematopoietic stem cell transplantation, allogeneic, cryopreservation, freezing, primary graft failure.

Clinical studies

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<h2 style="text-align: justify;">Резюме</h2>
<p style="text-align: justify;">
	 Острый миелоидный лейкоз (ОМЛ) представляет собой гетерогенное клональное заболевание крови опухолевой природы. Для пациентов с ОМЛ промежуточной цитогенетической группы риска, которая является гетерогенной по мутационному статусу целого ряда генов (FLT3, NPM1, CEBPA и т.д.), прогнозирование течения заболевания, оценка риска развития рецидива и выбор оптимальной терапии затруднены. В связи с этим поиск новых молекулярных маркеров, имеющих большое прогностическое значение, а так же полезных в аспекте оценки риска развития рецидива у пациентов с ОМЛ, лишенных крупных цитогенетических аномалий, является одной из приоритетных задач молекулярной онкогематологии. Для оценки применимости мониторинга уровня экспрессии гена BAALC (Brain And Acute Leukemia, Cytoplasmic) для предикции развития рецидива, оценки чувствительности и специфичности метода мониторинга BAALC с целью оценки эффективности терапии, мы проанализировали прогностическое значение гиперэкспрессии гена BAALC у 93 пациентов с ОМЛ в посттрансплантационном периоде. В свежих образцах костного мозга пациентов методом количественной ПЦР в режиме реального времени определялся уровень экспрессии гена BAALC. Пациенты были подразделены на группы низкой и высокой экспрессии BAALC на основании общего и индивидуального пороговых уровней экспрессии. Мы заключили, что гиперэкспрессия BAALC выше индивидуального и общего порогового уровней является прогностически значимым фактором для оценки риска развития рецидива в посттрансплантационном периоде, общей и безрецидивной выживаемости. Однако более детальный анализ BAALC как маркера эффективности терапии и его сравнение с референтными методами мониторинга минимальной остаточной болезни (такими как детекция химерных транскриптов генов методом количественной ПЦР в режиме реального времени) показал более низкую чувствительность такого подхода к мониторингу МОБ в посттрансплантационном периоде, по меньшей мере на примере исследуемой выборки пациентов. Частый мониторинг уровня экспрессии гена BAALC может быть рекомендован для предикции развития клинико-гематологического рецидива в ходе посттрансплантационного периода у пациентов с ОМЛ.
</p>
<h2 style="text-align: justify;">Ключевые слова</h2>
<p style="text-align: justify;">
	 Острый миелобластный лейкоз, BAALC, экспрессия гена, клинический прогноз, минимальная остаточная болезнь.
</p>
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Резюме

Острый миелоидный лейкоз (ОМЛ) представляет собой гетерогенное клональное заболевание крови опухолевой природы. Для пациентов с ОМЛ промежуточной цитогенетической группы риска, которая является гетерогенной по мутационному статусу целого ряда генов (FLT3, NPM1, CEBPA и т.д.), прогнозирование течения заболевания, оценка риска развития рецидива и выбор оптимальной терапии затруднены. В связи с этим поиск новых молекулярных маркеров, имеющих большое прогностическое значение, а так же полезных в аспекте оценки риска развития рецидива у пациентов с ОМЛ, лишенных крупных цитогенетических аномалий, является одной из приоритетных задач молекулярной онкогематологии. Для оценки применимости мониторинга уровня экспрессии гена BAALC (Brain And Acute Leukemia, Cytoplasmic) для предикции развития рецидива, оценки чувствительности и специфичности метода мониторинга BAALC с целью оценки эффективности терапии, мы проанализировали прогностическое значение гиперэкспрессии гена BAALC у 93 пациентов с ОМЛ в посттрансплантационном периоде. В свежих образцах костного мозга пациентов методом количественной ПЦР в режиме реального времени определялся уровень экспрессии гена BAALC. Пациенты были подразделены на группы низкой и высокой экспрессии BAALC на основании общего и индивидуального пороговых уровней экспрессии. Мы заключили, что гиперэкспрессия BAALC выше индивидуального и общего порогового уровней является прогностически значимым фактором для оценки риска развития рецидива в посттрансплантационном периоде, общей и безрецидивной выживаемости. Однако более детальный анализ BAALC как маркера эффективности терапии и его сравнение с референтными методами мониторинга минимальной остаточной болезни (такими как детекция химерных транскриптов генов методом количественной ПЦР в режиме реального времени) показал более низкую чувствительность такого подхода к мониторингу МОБ в посттрансплантационном периоде, по меньшей мере на примере исследуемой выборки пациентов. Частый мониторинг уровня экспрессии гена BAALC может быть рекомендован для предикции развития клинико-гематологического рецидива в ходе посттрансплантационного периода у пациентов с ОМЛ.

Ключевые слова

Острый миелобластный лейкоз, BAALC, экспрессия гена, клинический прогноз, минимальная остаточная болезнь.

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Pavlov Medical University, St. Petersburg, Russia [TYPE] => HTML ) [DESCRIPTION] => [VALUE_ENUM] => [VALUE_XML_ID] => [VALUE_SORT] => [~VALUE] => Array ( [TEXT] => R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, The First St. Petersburg State I. 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There are challenging issues for the intermediate-risk AML group, which is defined as non-homogeneous due to a variety of gene mutations (FLT3, NPM1, CEBPA, etc.), prediction of differential clinical course, relapse risk, and selection of adequate therapy. In this context, a search for new molecular markers with sufficient prognostic value for the relapse risk estimation in AML cases with no detectable cytogenetic abnormalities represents a high-priority task for clinical molecular oncohematology. We analyzed prognostic significance of BAALC (Brain And Acute Leukemia, Cytoplasmic) gene overexpression in 93 AML patients during the posttransplant period, in order to estimate feasibility of BAALC expression level monitoring, to predict the relapse risk, and to evaluate sensitivity and specificity of BAALC gene expression assay, to the purpose of minimal residual disease (MRD) monitoring. BAALC expression was determined by quantitative real-time polymerase chain reaction in fresh bone marrow samples. Patients were dichotomized at BAALC's individual and general cut-off into low and high expressers. We have concluded that BAALC overexpression above both individual and common cut-off levels is recognized as a prognostically significant factor for posttransplant relapse risk estimation, overall survival and relapse-free survival. A more detailed analysis of BAALC as a marker for estimation of therapeutic efficiency was performed. We have also compared its sensitivity to the reference techniques for minimal residual disease monitoring (i.e., qPCR-based detection of chimeric gene transcripts), showing inferior sensitivity of such approach to MRD detection in post-transplant period, at least, for our study group. Serial BAALC monitoring may be recommended for clinical relapse prediction during the post-transplant period in AML patients. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Acute myeloblastic leukemia, BAALC, gene expression, clinical prognosis, minimal residual disease. </p> [TYPE] => HTML ) [DESCRIPTION] => [VALUE_ENUM] => [VALUE_XML_ID] => [VALUE_SORT] => [~VALUE] => Array ( [TEXT] =>

Summary

Acute myeloid leukemia (AML) is a heterogenous clonal blood disease of a neoplastic origin. There are challenging issues for the intermediate-risk AML group, which is defined as non-homogeneous due to a variety of gene mutations (FLT3, NPM1, CEBPA, etc.), prediction of differential clinical course, relapse risk, and selection of adequate therapy. In this context, a search for new molecular markers with sufficient prognostic value for the relapse risk estimation in AML cases with no detectable cytogenetic abnormalities represents a high-priority task for clinical molecular oncohematology. We analyzed prognostic significance of BAALC (Brain And Acute Leukemia, Cytoplasmic) gene overexpression in 93 AML patients during the posttransplant period, in order to estimate feasibility of BAALC expression level monitoring, to predict the relapse risk, and to evaluate sensitivity and specificity of BAALC gene expression assay, to the purpose of minimal residual disease (MRD) monitoring. BAALC expression was determined by quantitative real-time polymerase chain reaction in fresh bone marrow samples. Patients were dichotomized at BAALC's individual and general cut-off into low and high expressers. We have concluded that BAALC overexpression above both individual and common cut-off levels is recognized as a prognostically significant factor for posttransplant relapse risk estimation, overall survival and relapse-free survival. A more detailed analysis of BAALC as a marker for estimation of therapeutic efficiency was performed. We have also compared its sensitivity to the reference techniques for minimal residual disease monitoring (i.e., qPCR-based detection of chimeric gene transcripts), showing inferior sensitivity of such approach to MRD detection in post-transplant period, at least, for our study group. Serial BAALC monitoring may be recommended for clinical relapse prediction during the post-transplant period in AML patients.

Keywords

Acute myeloblastic leukemia, BAALC, gene expression, clinical prognosis, minimal residual disease.

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Prognostic significance of BAALC overexpression in patients with AML during the posttransplant period

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Alena I. Shakirova, Ildar M. Barkhatov, Anna I. Churkina, Ivan S. Moiseev, Tatiana L. Gindina, Sergey N. Bondarenko, Boris V. Afanasyev

R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantation, The First St. Petersburg State I. Pavlov Medical University, St. Petersburg, Russia

Summary

Acute myeloid leukemia (AML) is a heterogenous clonal blood disease of a neoplastic origin. There are challenging issues for the intermediate-risk AML group, which is defined as non-homogeneous due to a variety of gene mutations (FLT3, NPM1, CEBPA, etc.), prediction of differential clinical course, relapse risk, and selection of adequate therapy. In this context, a search for new molecular markers with sufficient prognostic value for the relapse risk estimation in AML cases with no detectable cytogenetic abnormalities represents a high-priority task for clinical molecular oncohematology. We analyzed prognostic significance of BAALC (Brain And Acute Leukemia, Cytoplasmic) gene overexpression in 93 AML patients during the posttransplant period, in order to estimate feasibility of BAALC expression level monitoring, to predict the relapse risk, and to evaluate sensitivity and specificity of BAALC gene expression assay, to the purpose of minimal residual disease (MRD) monitoring. BAALC expression was determined by quantitative real-time polymerase chain reaction in fresh bone marrow samples. Patients were dichotomized at BAALC's individual and general cut-off into low and high expressers. We have concluded that BAALC overexpression above both individual and common cut-off levels is recognized as a prognostically significant factor for posttransplant relapse risk estimation, overall survival and relapse-free survival. A more detailed analysis of BAALC as a marker for estimation of therapeutic efficiency was performed. We have also compared its sensitivity to the reference techniques for minimal residual disease monitoring (i.e., qPCR-based detection of chimeric gene transcripts), showing inferior sensitivity of such approach to MRD detection in post-transplant period, at least, for our study group. Serial BAALC monitoring may be recommended for clinical relapse prediction during the post-transplant period in AML patients.

Keywords

Acute myeloblastic leukemia, BAALC, gene expression, clinical prognosis, minimal residual disease.

Clinical studies

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	 Представлено наблюдение миелодиспластического синдрома (МДС) с двумя редкими, повторяющимися и прогностически неблагоприятными нарушениями хромосом: транслокацией t(3;21)(q26.2;q22) и трисомией 13, которые обеспечили патологическим элементам резистентность к химиотерапии и трансплантации гемопоэтических стволовых клеток от сиблинга. На основании полученных данных и обсуждения в свете недавно открытых молекулярных механизмов резистентности к терапии при данном виде хромосомной патологии сделано заключение об ответственности данных нарушений хромосом за развитие резистентности к терапии, включая алло-ТГСК у больных МДС.
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<h2 style="text-align: justify;">Ключевые слова</h2>
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	 Первичный миелодиспластический синдром, t(3;21) (q26.2;q22), трисомия 13, ген EVI1/RUNX1, аллогенная трансплантация гемопоэтических клеток, резистентность к терапии.
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Представлено наблюдение миелодиспластического синдрома (МДС) с двумя редкими, повторяющимися и прогностически неблагоприятными нарушениями хромосом: транслокацией t(3;21)(q26.2;q22) и трисомией 13, которые обеспечили патологическим элементам резистентность к химиотерапии и трансплантации гемопоэтических стволовых клеток от сиблинга. На основании полученных данных и обсуждения в свете недавно открытых молекулярных механизмов резистентности к терапии при данном виде хромосомной патологии сделано заключение об ответственности данных нарушений хромосом за развитие резистентности к терапии, включая алло-ТГСК у больных МДС.

Ключевые слова

Первичный миелодиспластический синдром, t(3;21) (q26.2;q22), трисомия 13, ген EVI1/RUNX1, аллогенная трансплантация гемопоэтических клеток, резистентность к терапии.

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Mamaev, Tatiana L. Gindina, Elena V. Morozova, Yuliya V. Rudnitskaya, Maria V. Gubina, Ildar M. Barkhatov, Sergey N. Bondarenko, Boris V. Afanasyev [TYPE] => HTML ) [DESCRIPTION] => [VALUE_ENUM] => [VALUE_XML_ID] => [VALUE_SORT] => [~VALUE] => Array ( [TEXT] => Nikolay N. Mamaev, Tatiana L. Gindina, Elena V. Morozova, Yuliya V. Rudnitskaya, Maria V. Gubina, Ildar M. Barkhatov, Sergey N. Bondarenko, Boris V. 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He obtained one Dacogen course at the BMT Center followed by sequential transplantation of allogeneic bone marrow and peripheral blood hematopoietic stem cells from an HLA-DQB1 mismatched donor. The rejection of the first graft was documented on day 29 after transplantation, whereas the 2nd allo-HSCT grafting was more successful. The article contains serial cytogenetic findings and time-dependent changes in donor chimerism. We discuss individual resistance to the therapy, in view of recently proposed molecular mechanisms of resistance which might be responsible for resistance of cells in this case with complex chromosomal pathology. </p> <h2 style="text-align: justify;">Keywords</h2> <p style="text-align: justify;"> Myelodysplastic syndrome, primary translocation t(3;21)(q26.2;q22), trisomy 13, EVI1/RUNX1 gene, allogeneic hematopoietic stem cell transplantation, therapy resistance. </p> [TYPE] => HTML ) [DESCRIPTION] => [VALUE_ENUM] => [VALUE_XML_ID] => [VALUE_SORT] => [~VALUE] => Array ( [TEXT] =>

We present a case of primary myelodysplastic syndrome (MDS) in a young male with two rare but recurrent chromosome abnormalities, i.e., t(3;21)(q26.2;q22) and trisomy 13. He obtained one Dacogen course at the BMT Center followed by sequential transplantation of allogeneic bone marrow and peripheral blood hematopoietic stem cells from an HLA-DQB1 mismatched donor. The rejection of the first graft was documented on day 29 after transplantation, whereas the 2nd allo-HSCT grafting was more successful. The article contains serial cytogenetic findings and time-dependent changes in donor chimerism. We discuss individual resistance to the therapy, in view of recently proposed molecular mechanisms of resistance which might be responsible for resistance of cells in this case with complex chromosomal pathology.

Keywords

Myelodysplastic syndrome, primary translocation t(3;21)(q26.2;q22), trisomy 13, EVI1/RUNX1 gene, allogeneic hematopoietic stem cell transplantation, therapy resistance.

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Primary myelodysplastic syndrome with two rare recurrent chromosome abnormalities [t(3q26.2;q22) and trisomy 13] associated with resistance to chemotherapy and hematopoietic stem cell transplantation

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Nikolay N. Mamaev, Tatiana L. Gindina, Elena V. Morozova, Yuliya V. Rudnitskaya, Maria V. Gubina, Ildar M. Barkhatov, Sergey N. Bondarenko, Boris V. Afanasyev

R. Gorbacheva Memorial Institute of Children Oncology, Hematology and Transplantology at the St. Petersburg State I. Pavlov Medical University, L. Tolstoy St. 6-8, 197022, St. Petersburg, Russia

We present a case of primary myelodysplastic syndrome (MDS) in a young male with two rare but recurrent chromosome abnormalities, i.e., t(3;21)(q26.2;q22) and trisomy 13. He obtained one Dacogen course at the BMT Center followed by sequential transplantation of allogeneic bone marrow and peripheral blood hematopoietic stem cells from an HLA-DQB1 mismatched donor. The rejection of the first graft was documented on day 29 after transplantation, whereas the 2nd allo-HSCT grafting was more successful. The article contains serial cytogenetic findings and time-dependent changes in donor chimerism. We discuss individual resistance to the therapy, in view of recently proposed molecular mechanisms of resistance which might be responsible for resistance of cells in this case with complex chromosomal pathology.

Keywords

Myelodysplastic syndrome, primary translocation t(3;21)(q26.2;q22), trisomy 13, EVI1/RUNX1 gene, allogeneic hematopoietic stem cell transplantation, therapy resistance.