白血病抗原致敏树突状细胞联合双自杀基因增强Allo-BMT疗效的实验研究
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摘要
第一部分 白血病抗原致敏树突状细胞应用于荷白血病小鼠免疫治疗的实验研究
     目的:探讨白血病抗原冲击致敏的树突状细胞(DC)应用于荷白血病小鼠异基因骨髓移植(Allo-BMT)后免疫治疗的可行性及有效性,并初步探讨其免疫机理。
     方法:常规方法制备小鼠骨髓细胞,予mGM-CSF+mIL-4培养诱导DC生成,并于第3天予反复冻融法制备的冻融抗原冲击致敏,第7天获负载白血病抗原的成熟DC。电镜观察细胞形态,流式细胞仪鉴定细胞表型。雌性615小鼠接种L7212细胞3天后以雄性BALB/c鼠为供鼠行异基因骨髓移植(骨髓细胞2×10~7个/只)。移植后第14天分3组:①NS(A组)②普通T细胞(B组)③DC+T细胞(C组)进行免疫试验。观察小鼠骨髓移植及免疫治疗后一般状况、血象变化、GVHD发生等情况。免疫治疗14天通过流式细胞仪检测进行T细胞亚群分析、ELISA法检测血清细胞因子水平、MTT法进行脾细胞毒活力检测,并行C带染色法以进行染色体嵌合率分析,观察移植物植入情况。移植后50天,对所有无病生存的小鼠(除外免疫功能检测中处死的小鼠)用L7212细胞二次攻击,以观察其体内抗白血病免疫能力。
     结果:小鼠骨髓细胞在细胞因子mGM-CSF、mIL-4联合作用下培养6天后光镜下及电镜下观察到大量悬浮状态树突状形态细胞生成。该细胞DC相关分化
Part I Experimental study on immunotherapy with leukemia-related-antigen-pulsed dendritic cells in leukemic mice model
    Objective
    To explore the feasibility and efficiency of immunotherapy with leukemia-related-antigen-pulsed dendritic cells(DCs) in leukemic mice model after allogeneic bone morrow transplantation (Allo-BMT) and investigate its' reasons.
    Methods
    Mature DCs were proliferated from bone marrow mononuclearcells (MNC) by adding mouse granulocyte-macrophage colony stimulating factor (mGM-CSF) and interleukin-4 (mIL-4).3 days later, they were pulsed with frozen thawing L7212 leukemia-related antigen. In 6~(th) day .observed the morphous of mature DC by electron microscope and phenotype by FCM. 2 ×10~7 bone marrow cells from a male BALB/c mice were transplanted into the myeloablative irradiated female 615 mice which received a single subcutaneous injection of 1×10~6 L7212 leukemia cells 3 days before。 They were divided into control group (A)、T cells group (B) , DC+T cells group (C) to receive immunotherapy in 14~(th) day after Allo-BMT .We observed
引文
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