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Eltrombopag improves platelet engraftment after haploidentical bone marrow transplantation: Results of a Phase II study
Ahmed, S., Bashir, Q., Bassett, R. L., Jr., Ullah, F., Aung, F., Valdez, B. C., Alousi, A. M., Hosing, C., Kebriaei, P., Khouri, I., et al
American journal of hematology. 2024
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Editor's Choice
Abstract
Slow platelet recovery frequently occurs after haploidentical hematopoietic stem cell transplantation (haplo-HSCT) with bone marrow graft and post-transplant cyclophosphamide (PCy)-based graft-versus-host disease (GVHD) prophylaxis. Improved platelet recovery may reduce the need for transfusions and improve outcomes. We investigated the safety and efficacy of eltrombopag, a thrombopoietin receptor agonist, at enhancing platelet recovery post-haplo-HSCT. The prospective study included patients ≥18 years of age who received haplo-HSCT with bone marrow graft and PCy. Patients received eltrombopag 300 mg/day starting on Day +5. The primary objective was to estimate platelet engraftment (>50 000/μL by Day 60). In a post hoc analysis, they were compared to a contemporary matched control group who did not receive eltrombopag. One hundred ten patients were included in the analysis (30 eltrombopag and 80 control). Seventy-three percent and 50% of patients in the eltrombopag group and control group, respectively, attained >50 000/μL platelet count by Day 60 (p = .043). No eltrombopag-related grade ≥4 adverse events were observed. Median time to platelet recovery (>20 000/μL) was 29 days with eltrombopag and 31 days for controls (p = .022), while its cumulative incidence was 90% (95% confidence interval [CI]: 78%-100%) with eltrombopag versus 67.5% (95% CI: 57%-78%) for controls (p = .014). Number of platelet transfusions received, overall survival, progression-free survival, GVHD rate, relapse rate, and non-relapse mortality were similar between groups. Overall, eltrombopag is safe and improves platelet recovery in patients undergoing haplo-HSCT with bone marrow graft and PCy.
PICO Summary
Population
Adults underoing haploidentical transplant with bone marrow graft and post-transplant cyclophosphamide from a single centre in USA (n=110)
Intervention
Eltrombopag 300 mg/day starting on Day +5 (n=30)
Comparison
contemporary matched control group who did not receive eltrombopag (n=80)
Outcome
Seventy-three percent and 50% of patients in the eltrombopag group and control group, respectively, attained >50 000/μL platelet count by Day 60. No eltrombopag-related grade ≥4 adverse events were observed. Median time to platelet recovery (>20 000/μL) was 29 days with eltrombopag and 31 days for controls, while its cumulative incidence was 90% (95% confidence interval [CI]: 78%-100%) with eltrombopag versus 67.5% (95% CI: 57%-78%) for controls. Number of platelet transfusions received, overall survival, progression-free survival, GVHD rate, relapse rate, and non-relapse mortality were similar between groups.
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Outcomes of patients with multiple myeloma and 1q gain/amplification receiving autologous hematopoietic stem cell transplant: the MD Anderson cancer center experience
Pasvolsky, O., Ghanem, S., Milton, D. R., Rauf, M., Tanner, M. R., Bashir, Q., Srour, S., Saini, N., Lin, P., Ramdial, J., et al
Blood cancer journal. 2024;14(1):4
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Editor's Choice
Abstract
The prognostic impact of additional copies of chromosome 1q (1q + ) on outcomes of newly-diagnosed multiple myeloma (NDMM) patients undergoing autologous transplantation (autoSCT) is unclear. We conducted a retrospective single-center analysis of NDMM patients with 1q21 gain/amplification (3 or ≥4 copies of 1q, respectively) that received autoSCT between 2008-2018. 213 patients were included (79% 1q gain; 21% 1q amplification). The most commonly used induction regimen was bortezomib, lenalidomide, and dexamethasone (41%). At day100 post-autoSCT and at best post-transplant response, 78% and 87% of patients achieved ≥VGPR, and 38% and 50% achieved MRD-negative ≥VGPR, respectively. Median PFS and OS for the entire cohort were 35.5 months and 81.4 months, respectively. On multivariable assessment for PFS, MRD negative ≥VGPR before autoSCT (HR 0.52, p = 0.013) was associated with superior PFS, whereas 1q amplification was associated with inferior PFS (2.03, p = 0.003). On multivariate analysis for OS, achieving MRD negative ≥VGPR at best post-transplant response was associated with superior survival (0.29, p < 0.001), whereas R-ISS III and concomitant del17p or t(4:14) were associated with inferior survival (6.95, p = 0.030, 2.33, p = 0.023 and 3.00, p = 0.047, respectively). In conclusion, patients with 1q+ NDMM, especially 1q amplification, have inferior survival outcomes compared to standard-risk disease after upfront autoSCT, though outcomes are better than other high-risk cytogenetic abnormalities.
PICO Summary
Population
Adults with newly-diagnosed myeloma (NDMM) patients with 1q21 gain/amplification (3 or >/=4 copies of 1q, respectively) that received autoSCT between from a single centre in USA (n=213)
Intervention
Assess the prognostic impact of additional copies of chromosome 1q (1q+) on autologous transplantation outcomes
Comparison
None
Outcome
At day100 post-autoSCT and at best post-transplant response, 78% and 87% of patients achieved very good partial response or better (>/=VGPR) and 38% and 50% achieved MRD-negative >/=VGPR, respectively. Median PFS and OS for the entire cohort were 35.5 months and 81.4 months, respectively. On multivariable assessment for PFS, MRD negative >/=VGPR before autoSCT (HR 0.52) was associated with superior PFS, whereas 1q amplification was associated with inferior PFS (2.03). On multivariate analysis for OS, achieving MRD negative >/=VGPR at best post-transplant response was associated with superior survival (0.29), whereas R-ISS III and concomitant del17p or t(4:14) were associated with inferior survival (6.95, 2.33, and 3.00, respectively).
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3.
Azacitidine Post-transplant Maintenance Improves Disease Progression in High-Risk Acute Myeloid Leukemia and Myelodysplastic Syndrome
Pasvolsky, O., Saliba, R. M., Popat, U. R., Alousi, A., Mehta, R., Yeh, J., Al-Atrash, G., Adeel, M., Ramdial, J., Marin, D., et al
Clinical lymphoma, myeloma & leukemia. 2024
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Editor's Choice
Abstract
BACKGROUND Maintenance after allogeneic hematopoietic cell transplantation (alloHCT) with hypomethylating agents has yielded conflicting results. MATERIALS AND METHODS We conducted a single center retrospective matched-control analysis with the study group (5-azacitidine [AZA] group) including adults with FLT3-negative acute myeloid leukemia (AML) or myelodysplastic syndrome (MDS) who received post-transplant AZA maintenance off clinical trial (n = 93). A matched control group was comprised of contemporaneous AML/MDS patients who did not receive any maintenance (n = 357). Primary endpoint was disease progression. RESULTS The AZA and control groups had comparable patient and disease characteristics except for older age (median: 61 vs. 57 years, P = .01) and lower hematopoietic comorbidity index (median: 2 vs. 3, P = .04) in the AZA group. The 3-year cumulative incidence of progression in the AZA and control groups was 29% vs. 33% (P = .09). The protective effect of AZA on progression was limited to patients with high-risk AML/MDS (HR = 0.4, 95% CI = 0.2-0.8, P = .009). This led to improved progression-free survival both in high-risk AML and MDS patients with maintenance (HR = 0.2, 95% CI = 0.1-0.6, P = .004 and HR = 0.4, 95% CI = 0.2-0.9, P = .04). CONCLUSION AZA maintenance was associated with a lower progression rate in patients with high-risk FLT3-negative AML or MDS, and AZA maintenance should be considered for post-alloHCT maintenance in this subset.
PICO Summary
Population
Adults with FLT3-negative acute myeloid leukemia (AML) or myelodysplastic syndrome (MDS)
Intervention
Post-transplant 5-azacitidine (AZA) maintenance off clinical trial (n = 93).
Comparison
Contemporaneous AML/MDS patients who did not receive any maintenance (n = 357)
Outcome
The AZA and control groups had comparable patient and disease characteristics except for older age (median: 61 vs. 57 years) and lower hematopoietic comorbidity index (median: 2 vs. 3) in the AZA group. The 3-year cumulative incidence of progression in the AZA and control groups was 29% vs. 33%. The protective effect of AZA on progression was limited to patients with high-risk AML/MDS (HR = 0.4, 95% CI = 0.2-0.8). This led to improved progression-free survival both in high-risk AML and MDS patients with maintenance (HR = 0.2, 95% CI = 0.1-0.6, and HR = 0.4, 95% CI = 0.2-0.9).
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4.
Myeloablative Fractionated Busulfan for Allogeneic Stem Cell Transplant in Older Patients or Patients with Comorbidities
Popat, U. R., Pasvolsky, O., Bassett, R., Mehta, R. S., Olson, A. L., Chen, J., Alousi, A. M., Al-Atrash, G., Bashir, Q., Gulbis, A. M., et al
Blood advances. 2023
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Editor's Choice
Abstract
Traditional conditioning regimens for patients undergoing allogeneic hematopoietic stem cell transplantation (alloHCT) provide suboptimal outcomes, especially for older patients and those with comorbidities. We hypothesized that a fractionated myeloablative busulfan dose delivered over an extended period would reduce non-relapse mortality (NRM), while retaining anti-leukemic effects. Here, we performed a phase II trial for adults with hematological malignancies receiving matched related or unrelated alloHCT. Participants received busulfan 80mg/m2 outpatient on days -20 and -13 before transplant. Fludarabine 40mg/m2 was given on days -6 to -2 followed by busulfan dosed to achieve a target area under the curve of 20,000mol/min for the whole course. The primary endpoint was day 100 NRM. Seventy-eight patients were included, with a median age of 61 (range 39-70) years, transplanted for acute leukemia (24%), MDS (27%), or MPD/CML (44%). HCT specific comorbidity index (HCT-CI) was >3 in 34 (44%). With a median follow-up of 36.4 (range 2.9-51.5) months, 100-day, 1-year and 3-year NRM was 3.8% (95%CI, 0-8.1%), 8% (95%CI, 2-14%), and 9.3% (95%CI, 2.6-15.9%), without a significant difference by age or HCT-CI score. One-year and 3-year relapse incidence was 10% (95%CI, 4-17%) and 18% (95%CI, 9-27%), respectively. Three-year overall survival was 80% (95%CI, 72-90%) and was similar for patients >60 and <60 years of age, as well as those with HCT-CI>3 and HCT-CI<3. Overall, we found that a myeloablative fractionated busulfan regimen has low NRM without an increase in relapse rate, resulting in promising survival, even in older patients or in patients with comorbidities.
PICO Summary
Population
Adults with haematological malignancies receiving matched related or unrelated allogeneic transplant, from a single centre in USA (n=78).
Intervention
Busulfan 80mg/m2 outpatient on days -20 and -13 before transplant, fludarabine 40mg/m2 on days -6 to -2 followed by busulfan dosed to achieve a target area under the curve of 20,000mol/min for the whole course
Comparison
None
Outcome
With a median follow-up of 36.4 (range 2.9-51.5) months, 100-day, 1-year and 3-year non-relapse mortality was 3.8% (95%CI, 0-8.1%), 8% (95%CI, 2-14%), and 9.3% (95%CI, 2.6-15.9%), without a significant difference by age or HCT-CI score. One-year and 3-year relapse incidence was 10% (95%CI, 4-17%) and 18% (95%CI, 9-27%), respectively. Three-year overall survival was 80% (95%CI, 72-90%) and was similar for patients >60 and <60 years of age, as well as those with HCT-CI>3 and HCT-CI<3.
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5.
Transplant Outcomes of Myelofibrosis with Busulfan and Fludarabine Myeloablative Conditioning
Joseph, J., Srour, S. A., Milton, D. R., Ramdial, J. L., Saini, N. Y., Olson, A. L., Bashir, Q., Oran, B., Alousi, A. M., Hosing, C., et al
Transplantation and cellular therapy. 2023
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Editor's Choice
Abstract
BACKGROUND Outcomes of myelofibrosis with allogeneic stem cell transplantation (allo-SCT) have improved over the past decade and are partly related to advances in supportive treatments and conditioning regimens. Several factors are known to predict transplant outcomes. However, most studies lack homogeneity in the conditioning regimen used, which limits their ability to assess prognostic factors on transplant outcomes. OBJECTIVE We aimed to determine the risk factors that predict transplant outcomes in patients with myelofibrosis who underwent matched or mismatched allo-SCT using a uniform myeloablative conditioning regimen consisting of busulfan and fludarabine with tacrolimus and methotrexate-based graft-versus-host disease prophylaxis. STUDY DESIGN This single-center study included patients with myelofibrosis who underwent allo-SCT with a matched unrelated donor (MUD), matched related donor (MRD), or mismatched unrelated donor (MMUD) and received busulfan and fludarabine conditioning with methotrexate/tacrolimus-based GVHD prophylaxis. RESULTS Sixty-five patients with myelofibrosis met the criteria and were included in the study. At a median follow-up of 35.6 months, the 3-year cumulative incidence of relapse (CIR), non-relapse mortality (NRM), and overall survival (OS) for all study patients were 27%, 20%, and 65%, respectively. In a multivariable analysis for CIR, prior use of JAK inhibitors was significantly associated with a decreased risk of relapse (HR [95% CI], 0.33 [0.11-0.99]; p = 0.048). For NRM, HCT-CI (≥3 vs. <3, 10.09 [2.09-48.76]; p=0.004) and donor type (MUD vs. MRD, 5.38 [1.14-25.30]; p=0.033 and MMUD vs. MRD, 10.73 [1.05-109.4]; p=0.045) were associated with an increased risk of mortality. Likewise for OS, HCT-CI (≥3 vs. <3, 3.31 [1.22-8.99]; p = 0.019) and donor type (MMUD vs. MRD, 5.20 [1.35-19.98]; p = 0.016) were significantly associated with inferior survival. Longer time from diagnosis to allo-SCT seemed to confer worse survival but this didn't reach statistical significance (>12 months vs. ≤12 months: NRM, 7.20 [0.96-53.94]; p=0.055 and OS, 2.60 [0.95-7.14]; p=0.06). CONCLUSIONS In a homogenous cohort of myelofibrosis patients uniformly treated with busulfan/fludarabine myeloablative conditioning and methotrexate-based GVHD prophylaxis, we showed that donor choice and HCT-CI are the two strongest predictors for improved survival after allo-SCT.
PICO Summary
Population
People with myelofibrosis who underwent allo-SCT with a matched unrelated donor (MUD), matched related donor (MRD), or mismatched unrelated donor (MMUD) at a single centre in USA (n=176)
Intervention
Cohort for analysis: all who received myeloablative conditioning regimen consisting of busulfan and fludarabine with tacrolimus and methotrexate-based graft-versus-host disease prophylaxis (n=65)
Comparison
None
Outcome
At a median follow-up of 35.6 months, the 3-year cumulative incidence of relapse (CIR), non-relapse mortality (NRM), and overall survival (OS) for all study patients were 27%, 20%, and 65%, respectively. In a multivariable analysis for CIR, prior use of JAK inhibitors was significantly associated with a decreased risk of relapse (HR [95% CI], 0.33 [0.11-0.99]). For NRM, HCT-CI (>/=3 vs. <3, 10.09 [2.09-48.76]) and donor type (MUD vs. MRD, 5.38 [1.14-25.30] and MMUD vs. MRD, 10.73 [1.05-109.4]) were associated with an increased risk of mortality. Likewise for OS, HCT-CI (>/=3 vs. <3, 3.31 [1.22-8.99];) and donor type (MMUD vs. MRD, 5.20 [1.35-19.98]) were significantly associated with inferior survival. Longer time from diagnosis to allo-SCT seemed to confer worse survival but this didn't reach statistical significance (>12 months vs. </=12 months: NRM, 7.20 [0.96-53.94] and OS, 2.60 [0.95-7.14]).
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6.
Haploidentical vs matched unrelated donors for patients with ALL: donor age matters more than donor type
Mehta, R. S., Marin, D. C., Alousi, A., Kanakry, C. G., Champlin, R. E., Rezvani, K., Shpall, E. J., Page, K. M., Gadalla, S. M., Weisdorf, D. J., et al
Blood advances. 2023
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Editor's Choice
Abstract
Haploidentical hematopoietic cell transplantation (HCT) with post-transplant cyclophosphamide (PTCy) graft-versus-host-disease (GVHD) prophylaxis yields similar overall survival (OS) as HLA-matched-unrelated donor (MUD) HCT with conventional prophylaxis. Given prognostic implications of donor age, we investigated the impact of donor age ["younger" (<35 years; n=868) vs "older" (>35 years; n=418)] and donor-type [haploidentical (n=373) vs MUD (n=913)] on OS in adult patients with acute lymphoblastic leukemia (ALL). Older donor age was independently associated with significantly poor OS [hazard ratio (HR) 1.37, 95% confidence interval (CI) 1.10-1.71, p=0.005]; donor-type was not. Next, we directly compared the outcomes of a younger haploidentical donor (n=187) vs an older MUD (n=232). In this cohort, more patients in the haploidentical group had B-cell immunophenotype (89% vs 77%, respectively, p<0.001), poor cytogenetics (61% vs 51%, respectively, p=0.44), Philadelphia chromosome-negative (53% vs 48%, respectively, p=0.38), received bone marrow graft (42% vs 16%, respectively, p<0.001) and reduced-intensity conditioning (45% vs 23%, respectively, p<0.001). In multivariate analysis, the older MUD group was associated with a significantly higher risk of chronic GVHD [HR 1.91, 95% CI 1.28-2.85, p=0.002], higher non-relapse mortality (HR 2.75, 95% CI 1.51-4.99, p=0.001), lower relapse (HR 0.50, 95% CI 0.31-0.82, p=0.006) and poorer OS (HR 1.77, 95% CI 1.16-2.71, p=0.008). Despite a higher risk of relapse, younger donor haploidentical HCT with PTCy prophylaxis may be preferred over an older MUD HCT with conventional prophylaxis in patients with ALL due to lower nonrelapse mortality and better OS. Further analysis comparing the effect of donor age in haploidentical-PTCy vs MUD-PTCy is warranted.
PICO Summary
Population
Adults with acute lymphoblastic leukaemia undergoing matched unrelated donor or haploidentical transplantation and reported to the CIBMTR registry (n=1286)
Intervention
Donor age under 35 years (younger, n=868); Then younger haploidentical donor (n=187)
Comparison
Older donor age over 35 years (n=418); Then older matched unrelated donor (older MUD, n=232)
Outcome
Older donor age was independently associated with significantly poor OS [hazard ratio (HR) 1.37, 95% confidence interval (CI) 1.10-1.71,]; donor-type was not. Next, we directly compared the outcomes of a younger haploidentical donor (n=187) vs an older MUD (n=232). In this cohort, more patients in the haploidentical group had B-cell immunophenotype (89% vs 77%, respectively), poor cytogenetics (61% vs 51%, respectively), Philadelphia chromosome-negative (53% vs 48%, respectively), received bone marrow graft (42% vs 16%, respectively) and reduced-intensity conditioning (45% vs 23%, respectively). In multivariate analysis, the older MUD group was associated with a significantly higher risk of chronic GVHD [HR 1.91, 95% CI 1.28-2.85], higher non-relapse mortality (HR 2.75, 95% CI 1.51-4.99), lower relapse (HR 0.50, 95% CI 0.31-0.82) and poorer OS (HR 1.77, 95% CI 1.16-2.71).
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Impact of Donor Age in Haploidentical-Post-Transplantation Cyclophosphamide versus Matched Unrelated Donor Post-Transplantation Cyclophosphamide Hematopoietic Stem Cell Transplantation in Patients with Acute Myeloid Leukemia
Mehta, R. S., Ramdial, J., Marin, D., Alousi, A., Kanakry, C. G., Champlin, R. E., Rezvani, K., Shpall, E. J., Page, K., Gadalla, S. M., et al
Transplantation and cellular therapy. 2023;29(6):377.e1-377.e7
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Editor's Choice
Abstract
Haploidentical hematopoietic cell transplantation (HCT) with post-transplantation cyclophosphamide (PTCy) graft-versus-host-disease (GVHD) prophylaxis is associated with inferior overall survival (OS) compared to HLA-matched unrelated donor (MUD) HCT with PTCy prophylaxis in patients receiving reduced-intensity conditioning (RIC). Given prognostic implications of donor age, we investigated the differences in outcomes of patients with acute myeloid leukemia (AML; n = 775) undergoing RIC-HCT with a younger MUD (age <35 years; n = 84) versus a younger haploidentical donor (age <35 years; n = 302) versus an older haploidentical donor (age ≥35 years; n = 389). The older MUD group was excluded from the analysis because of small numbers. The younger haploidentical donor group (median age, 59.5 years) was somewhat younger than the younger MUD group (median age, 66.8 years) and the older haploidentical donor group (median age, 64.7 years). More patients in the MUD group received peripheral blood grafts (82%) compared to the haploidentical donor groups (55% to 56%). In multivariate analysis, compared to the younger MUD group, the younger haploidentical donor group (hazard ratio [HR], 1.95; 95% confidence interval [CI], 1.22 to 3.12; P = .005) and the older haploidentical donor group (HR, 2.36; 95% CI, 1.50 to 3.71; P < .001) had a significantly inferior OS, and the younger haploidentical donor group (HR, 3.72; 95% CI, 1.39 to 9.93; P = .009) and older haploidentical donor group (HR, 6.91; 95% CI, 2.75 to 17.39; P < .001) had a significantly higher risk of nonrelapse mortality. The older haploidentical group had a significantly higher risk of grade II-IV acute GVHD (HR, 2.29; 95% CI, 1.38 to 3.80; P = .001) and grade III-IV acute GVHD (HR, 2.70; 95% CI, 1.09 to 6.71; P = .03). There were no significant differences across the groups in the incidence of chronic GVHD or relapse. Among adult AML patients in CR undergoing RIC-HCT with PTCy prophylaxis, a young MUD may be preferred over a young haploidentical donor.
PICO Summary
Population
Adults with acute myeloid leukemia undergoing reduced intensity conditioning and transplant, identified from the CIBMTR database (n = 775)
Intervention
Younger (age <35 years) matched unrelated donor (MUD, n = 84)
Comparison
Younger (age <35 years) haploidentical donor (n = 302) older (age ≥35 years) haploidentical donor (n = 389)
Outcome
The younger haploidentical donor group (median age, 59.5 years) was somewhat younger than the younger MUD group (median age, 66.8 years) and the older haploidentical donor group (median age, 64.7 years). More patients in the MUD group received peripheral blood grafts (82%) compared to the haploidentical donor groups (55% to 56%). In multivariate analysis, compared to the younger MUD group, the younger haploidentical donor group (hazard ratio [HR], 1.95; 95% confidence interval [CI], 1.22 to 3.12) and the older haploidentical donor group (HR, 2.36; 95% CI, 1.50 to 3.71) had a significantly inferior OS, and the younger haploidentical donor group (HR, 3.72; 95% CI, 1.39 to 9.93) and older haploidentical donor group (HR, 6.91; 95% CI, 2.75 to 17.39) had a significantly higher risk of nonrelapse mortality. The older haploidentical group had a significantly higher risk of grade II-IV acute GVHD (HR, 2.29; 95% CI, 1.38 to 3.80) and grade III-IV acute GVHD (HR, 2.70; 95% CI, 1.09 to 6.71). There were no significant differences across the groups in the incidence of chronic GVHD or relapse.
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8.
Younger Haploidentical Donor Versus Older Matched Unrelated Donor for Patients With AML/MDS
Marcoux, C., Marin, D., Ramdial, J., AlAtrash, G., Alousi, A. M., Oran, B., Kebriaei, P., Popat, U. R., Rezvani, K., Champlin, R. E., et al
American journal of hematology. 2023
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Editor's Choice
Abstract
Optimal donor selection is fundamental to successful allogeneic hematopoietic cell transplantation (HCT), and donor age influences survival after both matched unrelated donor (MUD) and haploidentical donor HCT. Though recent studies have shown similar outcomes between MUD and haploidentical HCT, it is unknown if outcomes differ following HCT with younger haploidentical donors compared to HCT with older MUDs. Therefore, we performed a retrospective analysis comparing outcomes of myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML) patients who underwent HCT with younger (≤35 years) haploidentical donors (n = 494) or older (>35 years) MUDs (n = 1005). Patients in the haploidentical and MUD groups received post-transplant cyclophosphamide (PTCy) and conventional graft-versus-host-disease (GVHD) prophylaxis, respectively. In multivariate analysis, use of younger haploidentical donors was associated with improved overall survival (hazard ratio (HR) 0.81, 95% confidence interval (CI) 0.69-0.95, p = 0.01) and lower rates of grade II-IV acute GVHD (HR 0.64, 95%CI 0.53-0.77, p < 0.001), grade III-IV acute GVHD (HR 0.37, 95%CI 0.25-0.53, p < 0.001), and chronic GVHD (HR 0.49, 95%CI 0.40-0.60, p < 0.001). Relapse rates were similar among those who received myeloablative conditioning but were higher in patients of the younger haploidentical group who received reduced intensity conditioning (HR 1.49, 95%CI 1.18-1.88, p = 0.001). The younger haploidentical group had significantly lower non-relapse mortality ≥3 months post-HCT (HR 0.59, 95%CI 0.38-0.90, p = 0.02). Our data support the use of younger haploidentical donors with PTCy over older MUDs with conventional prophylaxis in patients with MDS or AML. Further studies on the importance of donor age in haploidentical and MUD HCT with PTCy prophylaxis are warranted. This article is protected by copyright. All rights reserved.
PICO Summary
Population
Adults with myelodysplastic syndrome or acute myeloid leukemia undergoing transplant between 2008 and 2017, and reported to the CIBMTR registry (n=1499)
Intervention
Younger (</=35 years) haploidentical donor transplantation, with post-transplant cyclophosphamide GvHD prophylaxis (haploidentical group n=494)
Comparison
Older (>35 years) matched unrelated donor transplantation, with conventional GvHD prophylaxis (MUD group, n=1005).
Outcome
In multivariate analysis, use of younger haploidentical donors was associated with improved overall survival (hazard ratio (HR) 0.81, 95% confidence interval (CI) 0.69-0.95) and lower rates of grade II-IV acute GVHD (HR 0.64, 95%CI 0.53-0.77), grade III-IV acute GVHD (HR 0.37, 95%CI 0.25-0.53), and chronic GVHD (HR 0.49, 95%CI 0.40-0.60). Relapse rates were similar among those who received myeloablative conditioning but were higher in patients of the younger haploidentical group who received reduced intensity conditioning (HR 1.49, 95%CI 1.18-1.88). The younger haploidentical group had significantly lower non-relapse mortality ≥3 months post-HCT (HR 0.59, 95%CI 0.38-0.90).
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9.
Outcomes of Autologous Stem Cell Transplant in Patients with Ultra High-Risk Multiple Myeloma
Pasvolsky, O., Ghanem, S., Milton, D. R., Masood, A., Tanner, M. R., Bashir, Q., Srour, S., Saini, N., Lin, P., Ramdial, J., et al
Transplantation and cellular therapy. 2023
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Editor's Choice
Abstract
BACKGROUND Multiple myeloma (MM) patients with high-risk cytogenetic abnormalities (HRMM) have inferior survival outcome and are under-represented in clinical trials. There is scarce data on MM patients with more than one high-risk cytogenetic aberration (i.e. ultra high-risk MM). OBJECTIVE To evaluate outcomes of newly diagnosed MM patients with ultra high-risk MM who underwent autologous stem cell transplant (autoHCT). STUDY DESIGN We conducted a retrospective single-center chart review analysis of adult patients with ultra high-risk MM who received autoHCT between 2008-2018 at MD Anderson Cancer Center. High-risk cytogenetics were defined as del17p, t(4;14), t(14;16) or 1q21 gain or amplification (1q+) by fluorescence in situ hybridization (FISH). Primary endpoints were progression-free survival (PFS) and overall survival (OS). RESULTS Seventy-nine patients with two or more high-risk cytogenetic abnormalities were included in our analysis, with a median age of 61 (range 33.5-76.5) years and 57% were female. Sixty-seven patients had two HR cytogenetic abnormalities, while 12 patients had three. The most common combinations of HR abnormalities were [1q+, t(4:14)] (n=25, 32%) and [1q+, del17p] (n=21, 27%). The majority of patients received either bortezomib, lenalidomide and dexamethasone (VRD) (48%) or carfilzomib, lenalidomide and dexamethasone (KRD) (16%) as induction therapy. Prior to autoHCT, 52 (66%) patients achieved ≥VGPR, whereas 23 (29%) patients achieved MRD negative ≥VGPR. Fifty-six (71%) patients received post-transplant maintenance therapy. At day 100 post autoHCT and at best post-transplant response, 36 (46%) patients and 40 (51%) patients achieved MRD negative ≥VGPR, respectively. With a median follow-up in surviving patients of 38.3 (range 11.9 to 104.8) months, the median PFS and OS in the entire cohort were 22.9 and 71.5 months, respectively. For the subset of patients with three HR abnormalities, the median PFS and OS were 15.6 and 28.0 months, respectively. In multivariate analysis, achieving MRD negative ≥VGPR prior to autoHCT was associated with improved PFS (HR 0.42; p=0.045), while male gender (HR 0.15; p=0.009) and achieving MRD negative ≥VGPR post autoHCT (HR 0.27; p=0.026) were associated with improved OS. CONCLUSIONS MM patients with ultra high-risk MM have a median PFS of <24 months with the current standard of care that includes consolidation with autoHCT. These patients may benefit from earlier use of newer treatment modalities, such as CAR-T and bispecific antibodies.
PICO Summary
Population
Adults with multiple myeloma with two or more high-risk cytogenetic abonormalities from a single centre in USA (n=79)
Intervention
Upfront autologous transplant between 2008 and 2018.
Comparison
None
Outcome
At day 100 post transplant and at best post-transplant response, 36 (46%) patients and 40 (51%) patients achieved minimal residual disease (MRD)-negative >/=very good partial response (VGPR), respectively. With a median follow-up in surviving patients of 38.3 (range 11.9 to 104.8) months, the median progression free survival (PFS) and overall survival (OS) in the entire cohort were 22.9 and 71.5 months, respectively. For the subset of patients with three high-risk abnormalities, the median PFS and OS were 15.6 and 28.0 months, respectively. In multivariate analysis, achieving MRD negative >/=VGPR prior to autoHCT was associated with improved PFS (HR 0.42), while male gender (HR 0.15) and achieving MRD negative >/=VGPR post autoHCT (HR 0.27) were associated with improved OS.
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10.
Impact of pre-transplant induction and consolidation cycles on AML allogeneic transplant outcomes: a CIBMTR analysis in 3113 AML patients
Boyiadzis, M., Zhang, M. J., Chen, K., Abdel-Azim, H., Abid, M. B., Aljurf, M., Bacher, U., Badar, T., Badawy, S. M., Battiwalla, M., et al
Leukemia. 2022
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Editor's Choice
Abstract
We investigated the impact of the number of induction/consolidation cycles on outcomes of 3113 adult AML patients who received allogeneic hematopoietic cell transplantation (allo-HCT) between 2008 and 2019. Patients received allo-HCT using myeloablative (MAC) or reduced-intensity (RIC) conditioning in first complete remission (CR) or with primary induction failure (PIF). Patients who received MAC allo-HCT in CR after 1 induction cycle had 1.3-fold better overall survival (OS) than 2 cycles to CR and 1.47-fold better than ≥3 cycles. OS after CR in 2 or ≥3 cycles was similar. Relapse risk was 1.65-fold greater in patients receiving ≥3 cycles to achieve CR. After RIC allo-HCT, the number of induction cycles to CR did not affect OS. Compared to CR in 1 cycle, relapse risk was 1.24-1.41-fold greater in patients receiving 2 or ≥3 cycles. For patients receiving only 1 cycle to CR, consolidation therapy prior to MAC allo-HCT was associated with improved OS vs. no consolidation therapy. Detectable MRD at the time of MAC allo-HCT did not impact outcomes while detectable MRD preceding RIC allo-HCT was associated with an increased risk of relapse. For allo-HCT in PIF, OS was significantly worse than allo-HCT in CR after 1-3 cycles.
PICO Summary
Population
Adults with acute lymphoblastic leukaemia who received allogeneic hematopoietic cell transplantation (allo-HCT) in 450 centres worldwide (n=3113)
Intervention
Patients achieving complete remission (CR) after 1 induction cycle (n=862)
Comparison
Patients requiring 2 cycles to CR (n=454) or 3 or more cycles to CR (n=157).
Outcome
Patients who received myeloablative (MAC) allo-HCT in CR after 1 induction cycle had 1.3-fold better overall survival (OS) than 2 cycles to CR and 1.47-fold better than ≥3 cycles. OS after CR in 2 or ≥3 cycles was similar. Relapse risk was 1.65-fold greater in patients receiving ≥3 cycles to achieve CR. After reduced-intensity conditioning (RIC) allo-HCT, the number of induction cycles to CR did not affect OS. Compared to CR in 1 cycle, relapse risk was 1.24-1.41-fold greater in patients receiving 2 or ≥3 cycles. For patients receiving only 1 cycle to CR, consolidation therapy prior to MAC allo-HCT was associated with improved OS vs. no consolidation therapy. Detectable MRD at the time of MAC allo-HCT did not impact outcomes while detectable MRD preceding RIC allo-HCT was associated with an increased risk of relapse. For allo-HCT in PIF, OS was significantly worse than allo-HCT in CR after 1-3 cycles.