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Prognostic impact of chromosomal changes at relapse after allogeneic hematopoietic cell transplantation for acute myeloid leukemia or myelodysplastic syndrome

Abstract

Chromosome analysis is a powerful prognostic tool in myeloid malignancies. Recipients who experience relapse after allogeneic hematopoietic cell transplantation (allo-HCT) often show chromosomal changes between diagnosis and relapse. However, the clinical impact of chromosomal changes and the efficacy of post-relapse treatment according to chromosomal changes have not been fully investigated. We retrospectively analyzed 72 recipients who had experienced relapse after allo-HCT for acute myeloid leukemia or myelodysplastic syndrome. We categorized them into two groups: with or without clonal chromosomal changes at relapse after allo-HCT. Post-relapse survival was shorter in the clonal chromosomal change group (median 117 days vs 275 days, P = 0.019). Moreover, acquisition of chromosome 7 abnormality or complex changes tended to be associated with inferior survival in a univariate analysis (median 92 days vs median 173 days, P = 0.043), and this adverse impact was confirmed in a multivariate analysis (hazard ratio 2.07, P = 0.024). The patterns of chromosomal changes from diagnosis to relapse after allo-HCT were heterogenous, and further investigations are required to clarify the effect of individual chromosomal changes.

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Fig. 1: Treatment after post-transplant relapse.
Fig. 2: Chromosomal changes added from diagnosis to relapse.
Fig. 3: The timing and details of chromosomal changes.
Fig. 4: Post-relapse survival.
Fig. 5: Post-relapse survival according to chromosome 7 or complex changes.

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All data generated or analysed during this study are included in this published article (and its supplementary information files).

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Acknowledgements

We would like to thank donors, recipients, and physicians for their contributions.

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Contributions

YO designed the study, collected, and analyzed data, and wrote the manuscript. HN designed the study, analyzed data, and wrote the manuscript. YN, MK, S Kawamura, JT, NY, YM, KY, SM, AG, TK, YA, MK, KK, AT, MT, S Kimura, S Kobayashi, and S Kako collected clinical data. FK and YK advised on the methods, wrote the manuscript, and were responsible for the projects.

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Correspondence to Yoshinobu Kanda.

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Okada, Y., Nakasone, H., Nakamura, Y. et al. Prognostic impact of chromosomal changes at relapse after allogeneic hematopoietic cell transplantation for acute myeloid leukemia or myelodysplastic syndrome. Bone Marrow Transplant 57, 810–816 (2022). https://doi.org/10.1038/s41409-022-01635-4

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