Impact of in vivo T-cell depletion on outcome of AML patients in first CR given peripheral blood stem cells and reduced-intensity conditioning all-SCT from a HLA-identical sibling donor : a report from the Acute Leukemia Working Party of the European group for Blood and Marrow Transplantation
Baron, Frédéric; Labopin, M.; Blaise, D.et al.
2014 • In Bone Marrow Transplantation, 49, p. 389-396
[en] The impact of in vivo T-cell depletion on transplantation outcomes in patients transplanted with reduced-intensity conditioning (RIC) remains controversial. This study assessed the outcome of 1250 adult patients with de novo AML in first CR (CR1) given PBSC from HLA-identical siblings after chemotherapy-based RIC. A total of 554 patients did not receive any form of in vivo T-cell depletion (control group), whereas antithymocyte globulin (ATG) and alemtuzumab were given in 444 and 252 patients, respectively. The incidences of grade II-IV acute GVHD were 21.4, 17.6 and 10.2% in control, ATG and alemtuzumab patients, respectively (Po0.001).
In multivariate analysis, the use of ATG and the use of alemtuzumab were each associated with a lower risk of chronic GVHD (Po0.001 each), but a similar risk of relapse, and of nonrelapse mortality, and similar leukemia-free survival and OS. Further, among patients given BU-based RIC, the use of o6 mg/kg ATG did not increase the risk of relapse (hazard ratio, HR¼1.1), whereas there
was a suggestion for higher relapse risk in patients given X6 mg/kg ATG (HR¼1.4, P¼0.08). In summary, these data suggest that a certain amount of in vivo T-cell depletion can be safely used in the conditioning of AML patients in CR1 given PBSC after chemotherapy-based RIC.
Impact of in vivo T-cell depletion on outcome of AML patients in first CR given peripheral blood stem cells and reduced-intensity conditioning all-SCT from a HLA-identical sibling donor : a report from the Acute Leukemia Working Party of the European group for Blood and Marrow Transplantation
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