中国汉坦病毒H82O5株G2糖蛋白基因的克隆及在真核细胞中的瞬时表达

从感染病毒乳鼠脑组织提取总RNA，采用RT－PCR和分子克隆技术将扩增到的G2糖蛋白基因插入含CMV启动子的pcDNA3.1/His质粒载体中，通过脂质体介导转染COS－7细胞，用SDS－PAGE、Western-blot及IFIA方法分别测定表达产物的相对分子量及特异性。结果证明获得正向插入的G2－pcDNA3.1/His重组表达质粒，表达产物的相对分子量为56ku，与理论预期大小一致，并且可与汉坦病毒H8205株的腹水抗体起特异反应。表明构建的G2－pcDNA3.1/His重组质粒所表达的蛋白为中国汉坦病毒株特有，能在哺乳动物细胞中表达并具有抗原性，重组质粒可应用于汉坦病毒的DNA疫苗研究。

Cloning and Transient Expression of the Gene Encoding Human Hantavirus H8205 Strain G2 Glycoprotein in Mammalian Cells

Total RNA from the brain tissue of the young mice infected with virus was extracted. The G2 glycoprotein gene was amplified and cloned into the plasmid vector pCDNA3 1/His containing CMV promoter by using RT PCR and molecular cloning technique,the recombinant plasmid G2 pCDNA3.1/His was transfected into eukaryotic COS 7 cells by lipofectine mediated transfection. SDS PAGE, Western blot and indirective FIA analysis were used to analyze the molecular weight and specificity of the expressed protein respectively. The results showed that the positive recombinant plasmid harbouring the right inserted G2 glycoprotein gene fragment was abtained. The protein expressed in mammalian cells COS 7 was about 56 ku, corresponding to the estimated molecular size of the G2 glycoprotein, and could react with the Hantavirus H8205 strain hyoerimmune mouse ascites. It was suggested that the G2 glycoprotein gene could be expressed in mammalian cells transiently and reserved Chinese specific antigenicity, indicating that the recombinant plasmid G2 pCDNA3 1/His could be used to develope DNA vaccine against Hantavirus.