Long-term outcomes of HLA-matched sibling compared with mismatched related and unrelated donor hematopoietic stem cell transplantation for chronic phase chronic myelogenous leukemia: a single institution experience in China

Qi-fa Liu, Xiao-jun Xu, Yin-kui Chen, Jing Sun, Yu Zhang, Zhi-ping Fan, Dan Xu, Qian-li Jiang, Yong-qiang Wei, Fen Huang, Ru Feng, Xiao-li Liu, Bing Xu, Fan-yi Meng
Annals of Hematology 2011, 90 (3): 331-41
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) remains the only curative therapy for chronic myelogenous leukemia (CML). In this study, the long-term outcomes of HLA-matched sibling donor (MSD) with mismatched related donor (MRD) and unrelated donor (URD) transplantation for CML in the first chronic phase (CML-CP1) using different graft vs. host disease (GVHD) prophylaxis regimens according to donor source and the degree of HLA matching were compared. The data of 91 patients with CML-CP1 were analyzed with respect to GVHD, overall survival (OS), and transplant-related mortality (TRM). The incidence of grade II-IV acute GVHD was 25.5% in the MSD and 40.5% in the MRD/URD group (P = 0.133). The 1-year cumulative incidence of chronic GVHD was not different between the MSD and the MRD/URD groups, while extensive chronic GVHD was different between the two groups (31.9% vs. 10.8%, P = 0.023). The 5-year cumulative relapse rate was not different between the MSD and the MRD/URD groups, while TRM was different between the two groups (6.6% vs. 26.3%, P = 0.010). The 5-year cumulative OS was 90.9%, 71.5%, and 85.4% in the MSD, the MRD/URD, and the HLA allele-matched URD transplantation, respectively (MSD vs. MRD/URD, P = 0.013; MSD vs. HLA allele-matched URD, P = 0.437). In conclusion, survival in HLA allele-matched URD is equivalent to MSD, but in MRD and mismatched URD is inferior to MSD in patients with CML-CP1 undergoing allo-HSCT using different GVHD prophylaxis regimens according to donor source and degree of HLA matching. Patients undergoing MRD/URD transplantation have an equal quality of life as patients undergoing MSD transplantation.

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