【摘要】 目的在高龄或同时存在不能耐受常规预处理方案的恶性血液病患者中,采用一种低强度预处理方案进行异基因造血干细胞移植治疗。方法12例患者中,急性淋巴细胞白血病(ALL)4例,慢性粒细胞白血病(CML)4例,伴原始细胞增多的难治性贫血(MDSRAEB)2例,急性髓系白血病2例。10例为HLA完全相合同胞移植,2例为1个位点不相合的同胞移植。预处理方案包括低剂量白消安2mg·kg-1·d-1,共3d,阿糖胞苷2g/m2,1～2次,环磷酰胺1.0g·m-2·d-1,共2d,抗胸腺细胞球蛋白(ATG)2.5mg·kg-1·d-1,共4d。11例患者采用经GCSF动员的供者骨髓加外周血干细胞移植,1例采用单纯外周血干细胞移植。输注有核细胞数平均为7.19×108/kg,CD34+细胞数平均为2.53×106/kg。急性移植物抗宿主病(aGVHD)预防采用环孢菌素A(CsA),短程甲氨蝶呤及霉酚酸酯联合方案。采用细胞遗传学、分子生物学及DNA短串联重复序列多态性(STR)分析方法鉴定供者干细胞植入情况。结果12例患者均能耐受此预处理方案,未发生严重预处理相关并发症。中性粒细胞绝对数>0.5×109/L的中位时间15(11～17)d,血小板植活中位时间15(10～23)d。移植后1个月鉴定植活情况,11例患者均全部转为供者型,1例患者为供、受者嵌合状态。出现aGVHD5例(41.6%),其中Ⅰ度2例,Ⅱ度2例,Ⅲ度1例,aGVHD发生率更多还原

【Abstract】 Objective To evaluate the use of a new reduced intensity of BuCy conditioning regimen for the treatment of malignant hematologic diseases in aged or intolerable patients receiving allogeneic hematopoietic stem cell transplantation (allo-HSCT) from the siblins. Methods Twelve patients with acute lymphoblastic leukemia (ALL,n=4), acute myelogenous leukemia (AML-M 2 ,n=2), chronic myelogenous luekemia (CML,n=4), and myelodysplastic syndromes-refractory anemia with excess blasts (MDS-RAEB,n=2) were intolerant of conventional myeloablative therapy because of age (older than 50 years) or having severe concurrent diseases. The median age was 49 years (range 42~64 years). Seven were males and five females. Two of the 12 patients were HLA one antigen-mismatched and the rest HLA identical with their donors. The low dosage conditioning regimen consisted of busulfan (2 mg·kg -1·d -1 for 3 days), Ara-C (2 g·m -2·d -1 for 1 or 2 times), cyclophosphamide (1.0 g·m -2·d -1 for 2 days) and anti-T-lymphocyte globulin (ATG 2.5 mg·kg -1·d -1 for 4 days, -5~-2 day). Granulocyte colony-stimulating factor mobilized bone marrow and peripheral blood stem cells (PBSC) were harvested (1 patient using PBSC alone). All patients received cyclosporin A, short-term MTX and mycophenolet mofetil (MMF) for prophylaxis of acute graft-versus-host disease (aGVHD). DNA short tandem repeat (STR) sequence analysis, cytogenetics and molecular-biologic technique were used to analyze chimerism. Results All the patients were well tolerated the regimen, with no severe regimen related toxicity. In all the 12 patients, absolute neutrophil count ≥0.5 ×10 9/L was achieved in 11 to 17(median 15) days and platelet count >20 × 10 9/L in 10 to 23 (median 15) days after transplantation. Complete chimerism was achieved in 11 patients and 1 patient was in mixed chimerism at one month after HSCT. With a median follow-up of 14.5 (4.0-24.0) months, 7 of the 12 patients (58.0%) were alive and 5(42.0%) of the 7 were disease-free. The probabilities of OS and DFS at 12 months were 75.0% and 48.1%. Five patients (41.6%) had aGVHD and four had local chronic GVHD with a cumulative probability of chronic GVHD of 41.5%. Conclusion This reduced intensity conditioning regimen is well tolerated and safe for HSCT in the older patients or patiants with severe concurrent medical conditions and can achieve full chimerism and long-term disease-free survival.更多还原