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Pasic I, Moya TA, Remberger M, Chen C, Gerbitz A, Kim DDH, Kumar R, Lam W, Law AD, Lipton JH, Michelis FV, Novitzky-Basso I, Viswabandya A, Mattsson J. Treosulfan- Versus Busulfan-based Conditioning in Allogeneic Hematopoietic Cell Transplantation for Myelodysplastic Syndrome: A Single-center Retrospective Propensity Score-matched Cohort Study. Transplant Cell Ther 2024:S2666-6367(24)00367-1. [PMID: 38648898 DOI: 10.1016/j.jtct.2024.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 04/02/2024] [Accepted: 04/18/2024] [Indexed: 04/25/2024]
Abstract
Treosulfan has shown promise in allogeneic hematopoietic cell transplantation (HCT) for its myeloablative properties and low toxicity. In this single-center retrospective propensity score-matched cohort study we compared treosulfan- and busulfan-based conditioning in allogeneic HCT for patients with myelodysplastic syndrome (MDS). This study included 138 adults who underwent allogeneic HCT for MDS or chronic myelomonocytic leukemia at Princess Margaret Hospital, Toronto, from 2015 to 2022. Using propensity score matching, we compared transplant outcomes between 2 well-matched cohorts who received conditioning with either fludarabine-treosulfan (FT) (n = 46) or fludarabine-busulfan with total body irradiation (FBT200) (n = 92). A scoring system based on patient age, Karnofsky performance score, and hematopoietic cell transplant comorbidity index was used to assign patients based on fitness to low-dose (30 g/m2) or high-dose (42 g/m2) treosulfan: 32 (69.6%) received high-dose treosulfan. The racial composition of the 2 groups was similar, with 27.2% and 21.7% of FBT200 and FT recipients, respectively, identifying as non-Caucasian (P = .61). Primary outcomes were analyzed at a median follow-up of 747 days. Of all participants, 116 (84.0%) received graft-versus-host disease (GVHD) prophylaxis with post-transplant cyclophosphamide (PTCY) and antithymocyte globulin (ATG). Patients who received FT had a superior 2-year overall survival (OS) compared to those who received FBT200: 66.9% (95% confidence interval (CI): 46.1 to 81.2) versus 44.5% (95% CI: 34 to 54.4), hazard ratio (HR): 0.43, 95% CI: 0.22 to 0.84 (P = .013). In multivariate analysis (MVA), only the use of fresh grafts (P = .02) and FT (P = .01) were associated with improved OS. FT was associated with superior 2-year relapse-free survival (RFS) compared to FBT200: 63.1% (95% CI: 42.6 to 77.9) versus 39.1% (95% CI: 29.1 to 49.1), HR: 0.44 (95% CI: 0.24 to 0.81), P = .008. In MVA, the use of fresh grafts (P = .03) and FT (P = .009) were associated with improved RFS. Recipients of FT demonstrated superior 2-year graft-versus-host disease relapse-free survival (GRFS) compared to those who received FBT200: 57.4% (95% CI: 37.8 to 72.8) versus 35.1% (95% CI: 25.5 to 45). In MVA, only FT was associated with superior GRFS (P = .02). FT recipients exhibited markedly superior 1-year event-free survival compared to recipients of FBT200 in univariate analysis (40.3% (95% CI: 25.9 to 54.2) versus 9.2% (95% CI: 4.4 to 16.3), HR: 0.47 (95% CI: 0.30 to 0.72), P < .001) and MVA (P = .004). FT was associated with lower 1-year nonrelapse mortality compared to FBT200 in univariate analysis (9.9% (95% CI: 3.0 to 21.8) versus 29.7% (95% CI: 20.6 to 39.3), HR: 0.41 (95% CI: 0.17 to 0.96), P = .04) and MVA (P = .04). Our study utilized propensity score matching to demonstrate superiority of treosulfan- over busulfan-based conditioning in stem cell transplantation of patients with MDS and is the first to evaluate the performance of treosulfan-based conditioning in combination with ATG and PTCY. As such, it contributes to the increasing body of evidence supporting the safety of treosulfan, even at the dose of 42 g/m2.
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Affiliation(s)
- Ivan Pasic
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada.
| | - Tommy Alfaro Moya
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
| | - Mats Remberger
- Department of Medical Sciences, Uppsala University and KFUE, Uppsala University Hospital, Uppsala, Sweden
| | - Carol Chen
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada
| | - Armin Gerbitz
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
| | - Dennis Dong Hwan Kim
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
| | - Rajat Kumar
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
| | - Wilson Lam
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
| | - Arjun Datt Law
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
| | - Jeffrey H Lipton
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
| | - Fotios V Michelis
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
| | - Igor Novitzky-Basso
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
| | - Auro Viswabandya
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
| | - Jonas Mattsson
- Division of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada
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Alfaro Moya T, Salas MQ, Santos Carreira A, Atenafu EG, Law AD, Lam W, Pasic I, Kim DDH, Michelis FV, Novitzky Basso I, Gerbitz A, Lipton JH, Kumar R, Mattsson J, Viswabandya A. Dual T cell depletion for graft versus host disease prevention in peripheral blood haploidentical hematopoietic cell transplantation for adults with hematological malignancies. Bone Marrow Transplant 2024; 59:534-540. [PMID: 38317015 DOI: 10.1038/s41409-024-02216-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/11/2024] [Accepted: 01/15/2024] [Indexed: 02/07/2024]
Abstract
The ideal immunosuppressive agents to complement post-transplant cyclophosphamide (PTCy) in PBSC-based haploidentical hematopoietic cell transplantation (haplo-HCT) remain debated. This study looks at our experience with ATG-PTCy-Cyclosporine (CsA) prophylaxis in PB haplo-HCT since 2015. Between October 2015 and December 2021, 157 adults underwent haploidentical hematopoietic cell transplantation (haplo-HCT) using a GVHD prophylaxis regimen comprising rabbit-ATG, PTCy, and CsA. Among these patients, 76.4% received a total ATG dose of 4.5 mg/kg, and 23.5% received 2 mg/kg. T-cell replete peripheral blood stem cell (PBSC) grafts were infused on day 0. The study reported a median follow-up of 32 months (range 0.3-61.64) for survivors. The cumulative incidence of grade II-IV and grade III-IV acute GVHD at day +100 was 26.3% and 9.5%, respectively. Moderate/severe chronic GVHD at 1 year was 19.9%. The 2-year overall survival (OS) was 49.4%, with a relapse-free survival (RFS) of 44.6%. In multivariate analysis, older patients, and those with high/very-high disease risk indices (DRI) were at higher risk for worse OS and higher non-relapse mortality (NRM). The study confirms that using PTCy and ATG (4.5 mg/kg), alongside CsA is safe and effective in preventing GVHD when using peripheral blood as the stem cell source in haploidentical hematopoietic cell transplantation (haplo-HCT).
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Affiliation(s)
- Tommy Alfaro Moya
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Maria Queralt Salas
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
- Department of Hematology, Bone Marrow Transplantation Unit, Hospital Clínic of Barcelona, Barcelona, Spain
| | - Abel Santos Carreira
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Eshetu G Atenafu
- Department of Biostatistics, Princes Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Arjun Datt Law
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Wilson Lam
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Ivan Pasic
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Dennis Dong Hwan Kim
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Fotios V Michelis
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Igor Novitzky Basso
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Armin Gerbitz
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Jeffrey Howard Lipton
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Rajat Kumar
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Jonas Mattsson
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Auro Viswabandya
- University of Toronto, Department of Medicine, Section of Medical Oncology and Hematology, Toronto, ON, Canada.
- Hans Messner Allogeneic Blood and Marrow Transplantation Program, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada.
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Alfaro Moya T, Mattsson J, Remberger M, Lipton JH, Kim DD, Viswabandya A, Kumar R, Lam W, Law AD, Gerbitz A, Pasic I, Novitzky-Basso I, Michelis FV. Influence of conditioning regimen intensity on outcomes post-allogeneic hematopoietic cell transplantation for acute myeloid leukemia in complete morphological remission. Eur J Haematol 2023; 111:553-561. [PMID: 37461810 DOI: 10.1111/ejh.14041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/30/2023] [Accepted: 07/03/2023] [Indexed: 09/16/2023]
Abstract
INTRODUCTION The literature comparing outcomes between myeloablative (MAC) and reduced intensity conditioning (RIC) for acute myeloid leukemia (AML) is conflicting. METHODS We retrospectively analyzed 451 patients who underwent allogenic hematopoietic cell transplantation (alloHCT) for AML in complete remission (CR) with either RIC (n = 331) or MAC (n = 120) with the use of dual T-cell depletion as graft-versus-host disease (GVHD) prophylaxis. RESULTS Univariate analysis demonstrated nonrelapse mortality (NRM) at 2 years was 19.1% for MAC and 22.5% for RIC (p = .44). Two-year cumulative incidence of relapse (CIR) was 19.8% for MAC and 24.5% for RIC (p = .15). Two-year overall survival (OS) was 61% and 53% for MAC and RIC, respectively (p = .02). Two-year graft-versus-host disease relapse-free survival (GRFS) was 40.8% for MAC and 33.7% for RIC (p = .30). A propensity score-matched analysis was done matching patients for age, HLA match, in vivo T-cell depletion, and Disease Risk Index (DRI). Two-year OS was 67% for MAC, 66% for RIC (p = .95). A subgroup analysis identified that matched related donor transplants benefit from MAC with OS at 2 years 82.6% versus 57.3% for RIC (p = .006). CONCLUSIONS In the matched-related donor setting, MAC regimens may offer superior survival. Overall, for our cohort of predominantly in vivo T-cell depleted patients the outcomes of MAC and RIC were similar.
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Affiliation(s)
- Tommy Alfaro Moya
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Jonas Mattsson
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Mats Remberger
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Jeffrey H Lipton
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Dennis D Kim
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Auro Viswabandya
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Rajat Kumar
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Wilson Lam
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Arjun D Law
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Armin Gerbitz
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Ivan Pasic
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Igor Novitzky-Basso
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
| | - Fotios V Michelis
- Hans Messner Allogeneic Transplant Program, Princess Margaret Cancer Centre, Toronto, Canada
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