作　　者： ; ; ; ; ; ;

机构地区： 河北农业大学

出　　处： 《中国兽医学报》 2012年第6期818-822,共5页

摘　　要： 为研究负载口蹄疫病毒VP1-VP4融合蛋白质的树突状细胞对淋巴结T细胞的活化效应,通过构建pET32a-VP1-VP4原核表达系统制备VP1-VP4融合蛋白。将纯化VP1-VP4融合蛋白负载骨髓源树突状细胞(BMDC)后与淋巴结T细胞共培养,用ELISA检测不同时间点的共培养上清液中IFN-γ的含量。结果表明,负载FMDVVP1-VP4融合蛋白后的BMDC可通过溶酶体-MHC-Ⅱ类分子途径有效地激活淋巴结T细胞,从而启动Th1细胞免疫应答,分泌大量IFN-γ。 To study the activation of T lymphocytes by bone marrow derived dendritic cells （BMDC） pulsed with re- combinant VP1-VP4 fusion protein of foot-and-mouth disease virus （FMDV） in vitro. The prokaryotic expression vector of pET32a-VP1-VP4 was constructed and VP1-VP4 fusion protein was expressed and purified by common SDS-PAGE and electroelution approach. BMDC pulsed with FMDV VP1-VP4 fusion protein were co-cultured with lymph node T cells. Supernatants were harvested at indicated time points and the IFN-γ levels of supernatants were determined with ELISA. The data show that BMDC pulsed with FMDV VP1-VP4 fusion protein are able to degrade VP1-VP4 antigen in lysosome and present the resulting peptides by MHC-II molecule for activating the T cells effi- ciently,leading to Thl-like response characteristic of release of IFN-γ.

关 键 词： 口蹄疫病毒 融合蛋白质 原核表达 树突状细胞 细胞

领　　域： [农业科学] [农业科学] [农业科学]