移植前铁过载对重型再生障碍性贫血异基因造血干细胞移植疗效的影响

目的  研究移植前铁过载对重型再生障碍性贫血（SAA）患者异基因造血干细胞移植（allo-HSCT）疗效的影响。方法  回顾性分析行首次allo-HSCT的80例SAA受者临床资料。根据有否铁过载，将受者分为铁过载组（20例）和无铁过载组（60例）。比较两组间受者移植后植入率、并发症发生情况及预后情况；采用Cox比例风险回归模型分析受者2年总生存率（OS）和180 d移植相关病死率（TRM）的影响因素。结果  无铁过载组的中性粒细胞植入率为98%（59/60），明显高于铁过载组的75%（15/20）（P < 0.05）。无铁过载组的血小板植入率为90%（54/60），明显高于铁过载组的65%（13/20）（P < 0.05）。无铁过载组血流感染发生率为23%（14/60），明显低于铁过载组的40%（8/20）（P < 0.05）。无铁过载组受者术后180 d TRM为17%，明显低于铁过载组的45%（P < 0.05）。无铁过载组受者术后1、2年OS分别为82%、80%，均高于铁过载组的50%、44%（均为P < 0.05）。是否有铁过载是受者的OS和TRM的独立危险因素（均为P < 0.05）。结论  铁过载可影响SAA患者allo-HSCT移植后的OS和TRM。

Effect of pretransplant iron overload on clinical efficacy of allogeneic hematopoietic stem cell transplantation on severe aplastic anemia

Objective To evaluate the effect of pretransplant iron overload on the clinical efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in patients with severe aplastic anemia (SAA). Methods Clinical data of 80 SAA recipients who underwent allo-HSCT for the first time were retrospectively analyzed. According to the incidence of iron overload, all recipients were divided into the iron overload group (n=20) and non-iron overload group (n=60). The engraftment rate, incidence of postoperative complications and clinical prognosis of the recipients afterallo-HSCT were statistically compared between two groups. The influencing factors of 2-year overall survival (OS) and 180 d transplantation related mortality (TRM) were analyzed by Cox proportional hazards regression model. Results The engraftment rate of neutrophils in the non-iron overload group was 98% (59/60), significantly higher than 75% (15/20) in the iron overload group (P < 0.05). The engraftment rate of platelet in the non-iron overload group was 90% (54/60), significantly higher than 65% (13/20) in the iron overload group (P < 0.05). The incidence rate of bloodstream infection in the non-iron overload group was 23% (14/60), remarkably lower than 40% (8/20) in the iron overload group (P < 0.05). The 180 d TRM of the recipients in the non-iron overload group was 17%, significantly lower than 45% in the iron overload group (P < 0.05). The 1- and 2-year OS of the recipients in the non-iron overload group were 82% and 80%, significantly higher than 50% and 44% in the iron overload group (both P < 0.05). Iron overload or not was an independent risk factor of the OS and TRM of the recipients (both P < 0.05). Conclusions Iron overload can affect the OS and TRM of SAA patients after allo-HSCT.