异基因外周血干细胞移植治疗恶性血液病

目的　探讨异基因外周血干细胞移植 (allo PBSCT)治疗血液系统恶性疾病。方法　 5 1例恶性血液病患者 ,中位年龄 34(5 .5～ 5 2 .0 )岁 ,接受了HLA配型相合或 1个位点不合的同胞供者PBSCT ,其中急性白血病 (AL) 31例 ,第 1次完全缓解 (CR1 )期 13例 ,第 2次完全缓解 (CR2 )期及以上 7例 ,未缓解或复发 11例 ,包括 2例异基因骨髓移植 (allo BMT)后复发 ;慢性粒细胞白血病 (CML) 12例 ,慢性期 5例 ,加速期 2例 ,急变期 4例 ,allo BMT后复发 1例 ;骨髓增生异常综合征 (MDS) 7例 ,RAEB及RAEB t各 1例 ,转为AL 5例 ;Burkitt淋巴瘤Ⅳ期 1例。采用全身照射 (TBI)或改良白消安预处理方案 ,预防移植物抗宿主病 (GVHD)采用经典环孢菌素 (CsA)加甲氨蝶呤 (MTX)方案。结果　所有患者均植活 ,中性粒细胞数恢复至≥ 0 .5× 10 9 L和BPC≥ 2 0× 10 9 L的中位时间分别为移植后第 14和 11天。发生Ⅱ度及以上急性GVHD 2 0例 (39% ) ,其中Ⅲ～Ⅳ度 2例 (4% )。 5 2 %的患者诊断慢性GVHD。死亡14例 ,8例死于移植相关合并症 ,6例死于复发。 37例长期存活 ,中位随访时间为 399(75～ 2 176 )d ,34例持续CR ,另 3例复发。 2年总生存率、无病生存率及复发率分别为 6 4 % ,6 1%及 2 4 %。结论　allo PBSCT治疗恶性血液病安全可靠

Allogeneic peripheral blood stem cell transplantation in the treatment of hematologic malignancies

OBJECTIVE: To investigate the application of allogeneic peripheral blood stem cell transplantation (allo-PBSCT) in the treatment of hematologic malignancies. METHODS: Between October 1995 and August 2001, fifty-one patients with hematologic malignancies (median age 34 years, range 5.5 approximately 52 years) received allo-PBSCT from HLA-identical (50) or 1-antigen mismatched sibling donors with conditioning regimens of TBI + CY or modified BU/CY2. Thirty-one patients were acute leukemia (AL) (15 in CR(1), 7 in CR(2) or greater, 10 in relapse including 2 relapse after allo-BMT and the other one never achieved remission); 12 chronic myeloid leukemia (CML) (CP 5, AP 2, BC 4 and relapse after allo-BMT 1); 7 MDS (RAEB 1, RAEB-T 1, AL secondary to MDS 5); Burkitt's lymphoma 1. A combination of cyclosporine and methotrexate was administered for GVHD prophylaxis. RESULT: All patients were engrafted. The median time (range) to neutrophil >/= 0.5 x 10(9)/L and platelet >/= 20 x 10(9)/L was 14 (10 approximately 20) and 11 (7 approximately 45) days post-transplant, respectively. Grade II approximately IV acute GVHD occurred in 20/51 (39%) and grade III approximately IV aGVHD in 2 patients. Clinical chronic GVHD was diagnosed in 23 of 44 (52%) evaluable patients. Fourteen patients died: 8 died of transplant related complications, 6 of relapse. Thirty-seven patients are alive with a median follow-up of 399 (75 approximately 2 176) days, and among them 34 are in continuous complete remission, the other 3 relapsed. The 2-year probability of overall survival, disease-free survival (DFS) and relapse is 64%, 61% and 24%, respectively. CONCLUSION: Allogeneic PBSCT is safe for both donors and recipients, and results in a rapid and stable engraftment without increase in incidence or severity of acute GVHD.