异基因造血干细胞移植治疗Fms样酪氨酸激酶3基因内部串联重复（FLT3-ITD）阳性的急性髓性白血病的疗效分析

Clinical outcome of FLT3-ITD （＋） acute myeloid leukemia patients treated with allogeneic hematopoietic stem cell transplantation

目的 分析异基因造血干细胞移植（allo-HSCT）治疗伴有Fms样酪氨酸激酶3基因内部串联重复（FLT3-ITD）阳性的急性髓性白血病（AML）的疗效,探讨不同移植方式及疾病状态对该类患者预后的影响.方法 2006年10月至2012年10月在苏州大学附属第一医院行allo-HSCT的AML患者共314例,其中FLT3-ITD阳性54例,回顾性分析allo-HSCT对FLT3-ITD阳性AML患者的临床疗效.结果 54例FLT3-ITD阳性患者3年总生存（OS）率为56％,3年无白血病生存（LFS）率为47％.其中同胞人类白细胞抗原（HLA）全相合及亲缘HLA单倍型相合造血于细胞移植的患者3年OS率分别为56％和60％,3年LFS率为45％和54％.两组在OS时间及LFS时间方面的差异均元统计学意义（x2=0.074,P=0.786;x2=0.006,P=0.941）.47例（87.0％）患者移植前本病处于首次完全缓解（CR1）,7例（13.0％）患者移植前本病处于非CR1期.处于CR1期的患者的生存显著优于非CR1期患者.结论 allo-HSCT是FLT3-ITD阳性AML患者的有效治疗方法,亲缘HLA单倍型相合造血干细胞移植与同胞HLA全相合移植疗效相似.疾病复发是影响其疗效的主要因素.

Objective To study the clinical outcome of patients with fns-like tyrosine kinase-3internal tandem duplication （FLT3-ITD） positive acute myeloid leukemia （AML） treated with allogeneic hematopoietic stem cell transplantation （allo-HSCT） and to explore the potential prognostic factors to patients＇ survival including transplant types or disease status.Methods A total of 314 AML patients in our center from October 2006 to October 2012 were retrospectively analyzed,among whom,54 patients were defined with FLT3-ITD positive.Survival rates and treatment-related mortality were further analyzed.Results For all 54 FLT3-ITD positive patients,the 3-year overall survival （3-OS） rate was 56% and 3-year leukemia-free survival （3-LFS） rate was 47%.The outcome of haplo-identical HSCT was similar as that of sibling donors（3-OS rate：60% vs 54% ; 3-LFS rate：54% vs 45%,respectively）.There were 47 patients who received transplantation in first complete remission（CR1）.The other 7 patients were of disease relapse or in CR2 before transplantation.Not surprisingly,patients in CR1 had better prognosis than those in nonCR1.Conclusions Allo-HSCT is an effective treatment for AML patients with FLT3-ITD positive mutation.The survival outcome of haplo-identical HSCT was comparable with that of sibling donors.Relapse of AML was the dominant factor related to the mortality of FLT3-ITD positive AML patients after allo-HSCT.