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由于HPV16E6蛋白能诱导机体保护性免疫反应,可作为基因治疗的靶抗原。用杆状病毒昆虫细胞表达系统制备了HPV16E6基因工程蛋白,拟用于宫颈癌细胞系小鼠模型抗癌的免疫治疗。用PCR技术从HPV16基因组中扩增获得转化基因E6的完整ORF,按TA策略将其克隆到自行制备的杆状病毒转移载体pVL1393T尾载体中,置于杆状病毒AcMNPVPolh晚期启动子控制之下,用此重组转移质粒pVL1393E6与杆状病毒DNA共转染昆虫细胞Sf9,经噬斑筛选获得带有编码E6蛋白基因的重组杆状病毒株,并在昆虫细胞Sf9中表达为非融合性E6蛋白。SDSPAGE电泳分析其分子量约为18kD,免疫印迹实验表明,此重组蛋白能被兔抗HPV16E6抗体所识别。
Because HPV16E6 protein can induce protective immune response, it can be used as target antigen for gene therapy. The baculovirus-insect cell expression system was used to prepare the HPV16E6 gene engineering protein, which is intended for anti-cancer immunotherapy in mouse cervical cancer cell line. PCR technique was used to amplify the complete ORF of transformed E6 from HPV16 genome and cloned into the self-prepared baculovirus transfer vector pVL1393T-tail vector according to TA strategy and placed in the baculovirus AcMNPVPolh late promoter control Under this recombinant transfer plasmid pVL1393 E6 and baculovirus DNA co-transfected insect cells Sf 9, plaque screening with recombinant E6 protein gene encoding recombinant baculovirus strain, and insect cells Sf 9 Expressed as a non-fusion E6 protein. SDS-PAGE analysis of its molecular weight of about 18kD, Western blotting experiments show that the recombinant protein can be rabbit anti-HPV16E6 antibody recognition.