Abstract
Since cord blood transplantation (CBT) has been associated with high graft-versus-leukemia effects and a low incidence of chronic graft-versus-host disease (GVHD), we hypothesized that long-term outcomes might be better in CBT patients than in those given grafts from unrelated donors (UD). Therefore, we performed a landmark study comparing long-term outcomes in acute myeloid leukemia (AML) patients alive and disease-free 2 years after transplantation who received grafts from either CBT or UD. A total of 364 CBT recipients, 2648 UD 10/10 patients and 681 patients given grafts from UD 9/10 were included. Median follow-up was 6.0 years. Five-year leukemia-free survival (LFS) from transplantation was 86% in CBT patients, 84% in UD 10/10 patients (P = 0.36) and 84% in UD 9/10 patients (P = 0.86). On multivariate analysis, donor type had no impact on LFS. Similarly, no impact of donor type was observed on relapse incidence or non-relapse mortality. Factors associated with poorer LFS on multivariate analysis included higher age at transplantation (P < 0.001), male gender (P < 0.001), second complete remission (CR2) versus CR1 (P = 0.05), secondary AML (P = 0.01), antecedent of chronic GVHD (P < 0.001) and poor-risk cytogenetics (P = 0.01). In conclusion, our study shows that long-term outcome for AML patients in CR two years after transplantation is not impacted by donor type.
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Acknowledgements
We thank Emmanuelle Polge and Audrey Mailhol from the office of the ALWP of the EBMT. FB is Senior Research Associate at the National Fund for Scientific Research (FNRS) Belgium. The list of participating centers is provided in the Supplementary Appendix 1.
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FB wrote the manuscript, designed the study, and interpreted the data; MN and ML designed the study, analyzed and interpreted the data, and edited the manuscript; AN and MM designed the study, interpreted the data and edited the manuscript; JC, AG, EF, HS, GS, DB, MB, TV, HCR, NK, and AR reviewed and/or edited the manuscript and provided clinical data. All authors approved the final version of the manuscript.
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FB has received travel grants and/or speaker honoraria from Celgene, AbbVie, Novartis, Pfizer, and Sanofi. HCR received consulting and lecture fees from Abbvie, AstraZeneca, Vertex and Merck. HCR received research funding from Gilead Pharmaceuticals. HCR is a co-founder of CDL Therapeutics GmbH. The other authors declare that they have no relevant conflict of interest in relation to this study.
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The scientific board of the ALWP of the EBMT approved this study. All patients gave informed consent to participate in retrospective studies.
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Baron, F., Ngoya, M., Labopin, M. et al. Comparison of long-term outcome for AML patients alive free of disease 2 years after allogeneic hematopoietic cell transplantation with umbilical cord blood versus unrelated donor: a study from the ALWP of the EBMT. Bone Marrow Transplant 56, 2742–2748 (2021). https://doi.org/10.1038/s41409-021-01387-7
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DOI: https://doi.org/10.1038/s41409-021-01387-7