Influence of donor-recipient sex matching on outcomes of haploidentical hematopoietic stem cell transplantation for acute leukemia / 中华血液学杂志

ABSTRACT

Objective: To determine the influence of donor-recipient sex matching on outcome of haploidentical hematopoietic stem cell transplantation (haplo-HSCT) for acute leukemia in the setting of T-cell-replete transplants. Methods: The retrospective study is based on 1 160 consecutive patients who received their first haplo-HSCT for acute leukemia between April 2002 and December 2014 at Peking University Institute of Hematology. The patients were divided into the sex-matched group and sex-mismatched group in terms of the recipient and donor sex. Then we conducted an analysis in four subgroups, male patients with male donors (M→M), male patients with female donors (F→M), female patients with female donors (F→F), and female patients with male donors (M→F). Transplant outcomes were measured in terms of hematopoietic recovery, acute graft versus host disease (aGVHD), relapse, nonrelapse mortality (NRM), disease-free survival (DFS) and overall survival (OS) in the above four subgroups. Then univariate and multivariate analysis were conducted. Results: There was a higher 3-year and 5-year NRM but no difference in other transplant outcomes in sex-mismatched group when compared with the sex-matched group. F→M was compared with M→M, and the former group had higher 3-year and 5-year cumulative incidences of NRM (25.5% vs 16.1%, P=0.002; 27.1% vs 17.3%, P=0.002), decreased 5-year DFS (56.9% vs 64.4%, P=0.044), decreased 3-year OS (62.6% vs 69.8%, P=0.045). There was no significant difference in 3-year DFS and 5-year OS. There was no significant difference in grade Ⅱ-Ⅳ aGVHD and cGVHD incidence. When F→F group was compared with M→F group, only a higher grade Ⅱ-Ⅳ aGVHD incidence (43.9% vs 34.6%, P=0.047) existed. F→M was proved to be the independent risk factor influencing NRM and OS in multivariate analysis. Conclusion: In haplo-HSCT for acute leukemia, the donor-recipient sex combination of male patients with female donors was of a poorer prognosis, so a male donor was a better choice for a male patient.