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秦凤华

作品数:2 被引量:4H指数:1
供职机构:北京大学基础医学院免疫学系更多>>
发文基金:国家自然科学基金更多>>
相关领域:医药卫生更多>>

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多途径联合诱导器官移植耐受和促进免疫功能重建被引量:1
2007年
SUMMARY The induction of transplantation tolerance and the improvement of immune reconstitution after allogeneic bone marrow transplantation are the main research fields in the clinic organ transplantation and transplantation immunology.Over the past 5 years serial studies have been performed in our lab to induce robust transplantation tolerance by using combinated strategies and improve the immune reconstitution of mice following allogeneic bone marrow transplantation by using gene-engineered bone marrow stromal cells.The results are encouraging.(1)The long-term survival of allografts was received by blockade of both CD28/B7 and CD40/CD40L or CD28/B7 and OX40/OX40L costimulating signals.In the case of blockade of both CD28/B7 and OX40/OX40L,the islet allograft survival was over 150 days compared to the control 14 days.(2)The CTLA4Ig-FasL fusion molecule expressed by adenoviral vector containing CTLA4Ig-FasL gene can prevent the autoimmune diabetes of mice and significantly prolong the survival time of cardiac allografts in rats,indicating that Fas-FasL-mediated apoptosis is able to enhance CTLA4Ig-induced transplantation tolerance.(3)In the time-window of peripheral tolerance induced by various methods,the systemic infusion of donor bone marrow cells and spleen cells obtained stable allogeneic mixed chimerisms and robust transplantation tolerance.In the case of CTLA4Ig-FasL treatment combinated with donor bone marrow cells more than 20% donor-origin blood cells chimerism,and more than 200 days prolonged skin allograft survival were obtained or received.(4)The murine bone marrow stromal cell line QXMSC1 transfected with IL-6 gene or IL-2+IL-3 genes significantly improved the immune reconstitution of mice following allogeneic bone marrow transplantation.Furthermore,It was observed that the mesenchymal stem cells transfected with IL-7 gene suppressed 90% of GVHD and expressed antileukemic effect,while accelerating immune reconstitution in mice following allogeneic bone marrow transplantation,which might be valuable
谢蜀生金永柱李爱玲秦凤华王光明马建波郝洁高翔
关键词:移植耐受细胞凋亡移植嵌合体间质干细胞
转染IL-6基因骨髓基质细胞系对骨髓移植后免疫功能重建的促进作用被引量:3
2002年
目的 探讨转染IL 6基因的骨髓基质细胞系对同基因骨髓移植 (BMT)后小鼠免疫功能重建的促进作用。方法 将IL 6cDNA片段连接到pcDNA3真核表达载体上。用脂质体将pcD NA3IL 6转入骨髓基质细胞系QXMSC1,ELISA法测定转染IL 6基因骨髓基质细胞QXMSC1IL 6培养上清中IL 6的含量 ,有限稀释挑选多个细胞克隆 ,选择表达量最高的转基因细胞系QXMSC1IL 6用于动物实验。BABL c小鼠经γ射线致死量照射后 ,输入同基因骨髓细胞 (10 7 只 )同时输入骨髓基质细胞QXMSC1IL 6 (5× 10 5 只 )。在骨髓移植后 30d、6 0d检测BMT小鼠淋巴细胞对LPS ,ConA增殖反应 ,T辅助细胞前体 (helpTlymphocyteprecursor,HTLp) ,杀伤性T细胞前体 (cytotoxicTlymphocyteprecursor,CTLp) ,迟发型超敏反应 (delayed typehypersensitivity ,DTH)及空斑形成细胞数 (plaqueformingcell,PFC) ,反映骨髓移植后小鼠免疫功能。结果 成功构建pcDNA3IL 6重组体。该细胞体外培养 2 4h分泌IL 6的含量为 11.15 (± 2 .4 1) μg 10 6 。QXMSC1IL 6细胞系能明显增强BMT后淋巴细胞对LPS、ConA反应性 ,小鼠对异基因小鼠脾细胞DTH反应增强 ,脾脏中HTLp ,CTLp及PFC数明显增加。转入外源IL 6cDNA基因的骨髓基质细胞系QXMSC1IL 6在体内能明显促进BMT后小鼠T、B淋巴?
秦凤华蒋激扬金永柱郝洁谢蜀生
关键词:骨髓移植骨髓基质细胞免疫重建
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