异基因骨髓移植治疗慢性粒细胞白血病的疗效比较

我们自 1997年 1月开始用Ｇ ＣＳＦ刺激后的供者骨髓对慢性髓细胞白血病 (ＣＭＬ)患者进行移植治疗 ,并和同期未用Ｇ ＣＳＦ动员的供者骨髓移植进行比较 ,现报道如下。病例和方法1　病例　研究组 :供者应用Ｇ ＣＳＦ处理组。患者共 2 3例 ,男 14例 ,女 9例 ,中位年龄 30 (15～ 46 )岁 ,移植前处于慢性期者 17例 ,加速期者 6例 ;供者 :男 11名 ,女 12名 ,中位年龄 30(18～ 45 )岁。对照组 :供者未接受Ｇ ＣＳＦ处理组。患者 :共15例 ,男 9例 ,女 6例 ,中位年龄 31(16～ 44 )岁 ,移植前慢性期 11例 ,加速期 4例 ;供者 :男 8名 ,女 7名 ,中位年…     

Low incidence of severe aGVHD and accelerating hemopoietic reconstitution in allo-BMT using lenograstim stimulated BM cells

Objectives To investigate the efficacy of accelerating hemopoietic reconstraction and reducing a graft versus host disease (GVHD) in Allo-BMT receiving lenogras tim stimulated donor marrow and to assess the preliminary biological mechanism .Methods The donors for thirty patients (study group) with leukemia were given lenograsti m 3-4 μg·kg(-1) ·d(-1) for seven days prior to marrow harvest. The results of subsequent engraftment in the recipients was compared w ith fifteen donors without G-CSF (control group). Five donors themselves were studied t o assess the effects of lenograstion on hematopoietic progenitor cells and lym phocyte subsets in BM.Results The stimulated bone marrow contained a higher number of nucleated cells, CFU-GM and CD34(+) cells (P<0.01). The hematopoetic reconstitution was accelerat ed. Until granulocyte counts exceeded 0.5×10(9) /L and plalete counts exceeded 20×10(9) /L, the days were 16.7±3.2 and 18.4±3.0 days as compared with t hose of the control group (22.5±5.1 and 26.3±5.9 days respectively, P < 0.01). The incidence of grade Ⅱ-Ⅳ aGVHD was very low, only one case with g rade Ⅱ aGVHD on the skin in the study group. Four out of fifteen patients (2 6.7%) in the control group had grade Ⅱ-Ⅳ aGVHD (P<0.05) . The number of T lymphocyte subsets in the harvested BM stimulated by G-CSF changed. In comp arison with the control group, CD4(+) decreased and CD8(+) increased significan tly (P<0.01). The changes of progenitor cells and T lymphocyte subsets in BM from pre- to post- G-CSF stimulation indicated that the percentage o f CD4(+) cells reduced (P<0.05), that of CD8(+) cells, and that of CD34(+) i ncreased (P<0.01). The incidence of chronic GVHD and relapse of leukemia were not different significantly between both groups.Conclusions Allogenic bone marrow transplant (Allo-BMT) donors given G-CSF can accelerate engraftment and minimize the incidence of sever e aGVHD. There is a trend in favour of improved transplant-related complicatians.     

全反式维甲酸联合细胞因子对NB_4细胞增殖分化作用的体外研究

目的 :探讨新的药物协同 ATRA诱导早幼粒白血病细胞分化作用 ,降低临床 ATRA剂量 ,提高ATRA疗效。方法 :NB4细胞株为实验模型 ,采用细胞生物学研究方法 ,体外研究 IFNγ、TNF和 G- CSF各结合ATRA对 NB4细胞增殖和分化的作用。结果 :在诱导分化和抑制白血病克隆增殖中 ,IFNγ和 TNF具协同作用 ,以IFNγ作用最明显 ,在 ATRA浓度为 10 - 8mol/ L 时 ,比较各细胞因子联合 ATRA对 NB4细胞作用后 NBT的变化 ,发现联合 IFNγ组 NBT仍达 92 % ,高于其它各组 (P<0 .0 1) ,细胞周期变化 :联合 IFNγ作用后使 G0 / G1 期积聚最明显 ,由对照的 5 0 .5 %增至 86 .2 % ,半固体克隆增殖抑制实验显示 ,ATRA与 IFNγ联合用药组具明显抑制 NB4细胞克隆增殖活性作用。结论 :细胞因子 IFNγ与 ATRA联合具较强协同诱导 NB4细胞分化和抑制克隆增殖作用 ,这对临床联合 IFNγ诱导早幼粒白血病分化治疗提高 ATRA疗效有一定价值。