Abstract
Anti-thymocyte globulin (ATG) is widely used to reduce acute and chronic graft-versus-host disease (a/cGVHD), one of the leading causes of morbidity and mortality after allogeneic hematopoietic stem cell transplantation (HSCT). As the removal of alloreactive T cells by ATG may also reduce the graft-versus-leukemia effect, the question of whether ATG use affects relapse incidence and survival outcomes in acute leukemia patients with pre-transplant bone marrow residual blasts (PRB) remains controversial. Here, we evaluated the impact of ATG on transplant outcomes in acute leukemia patients with PRB (n = 994) who underwent HSCT from HLA 1-allele mismatched unrelated donors (MMUD) or HLA 1-antigen mismatched related donors (MMRD). In MMUD with PRB (n = 560), multivariate analysis demonstrated that ATG use significantly decreased grade II–IV aGVHD (hazard ratio [HR], 0.474; P = 0.007) and non-relapse mortality (HR, 0.414; P = 0.029) and marginally improved extensive cGVHD (HR, 0.321; P = 0.054) and GVHD-free/relapse-free survival (HR, 0.750; P = 0.069). We concluded that ATG had different effects on transplant outcomes using MMRD and MMUD, and its use would be beneficial to decrease a/cGVHD without increasing non-relapse mortality and relapse incidence in acute leukemia patients with PRB following HSCT from MMUD.
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TRUMP data from this study is not shared for public access without permission.
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The authors thank all the physicians and staff members of the collaborating institutes of the Japan Society for Hematopoietic Stem Cell Transplantation.
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MW designed the research, analyzed the data, and wrote the manuscript; ST analyzed the data and helped write the manuscript; TF, ND, YK, YO, MT, YK, TE, ST, SK, NU, and TK contributed to data collection; YH, TI and YA supervised data management; KF, MM, and JK designed and supervised the research; and all authors reviewed and approved the final version of the manuscript.
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Wakamatsu, M., Murata, M., Kanda, J. et al. Different effects of thymoglobulin on acute leukemia with pre-transplant residual blasts in HLA mismatch transplantation. Int J Hematol 117, 889–899 (2023). https://doi.org/10.1007/s12185-023-03563-5
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DOI: https://doi.org/10.1007/s12185-023-03563-5