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• 基础研究 • 上一篇    下一篇

人肝细胞生长因子真核表达载体的构建及在COS7细胞中的表达

李玉香,王 峰,牛俊奇,闫红青,张锦前*,姜艳芳   

  1. 吉林大学第一医院感染症科,吉林 长春 130021
  • 收稿日期:2006-08-22 修回日期:1900-01-01 出版日期:2007-03-28 发布日期:2007-03-28
  • 通讯作者: 牛俊奇

Construction of hepatocyte growth factor expression vector and detection of its expression in COS7 cell line

LI Yu-xiang, WANG Feng, NIU Jun-qi, YAN Hong-qing, ZHANG Jin-qian*, JIANG Yan-fang   

  1. Department of Infectious Disease, First Hospital, Jilin University, Changchun 130021, China
  • Received:2006-08-22 Revised:1900-01-01 Online:2007-03-28 Published:2007-03-28
  • Contact: NIU Jun-qi

摘要: 目的:构建人肝细胞生长因子(HGF)的真核表达载体,并在COS7细胞中进表达。方法:利用PCR技术扩增HGF基因,与PCI-Neo载体连接,构建成重组真核表达载体PCI-neo-HGF,应用限制性内切酶法及测序方法进行鉴定。利用脂质体将PCI-HGF转入COS7细胞系中,用ELISA法检测培养液上清中的HGF的表达水平。结果:重组真核表达载体PCI-neo-HGF经限制性内切酶分析,片段与理论值相符,测序结果与GenBank 对比, HGFcDNA序列同源性99%, 插入正确;将重组真核表达载体PCI-neo-HGF转染COS7细胞,于转染12 h开始有表达,36~72 h表达量较高(约2 000 ng•L-1),以后逐渐下降。结论: 成功构建了带有HGF 基因真核表达载体,并能在转染细胞中表达。

关键词: 遗传载体, 基因表达, COS细胞

Abstract: To construct PCI-hepatocyte growth factor (HGF) expression vector and to detect its transient expression in transfected COS7 cell line. Methods Techniques of gene recombination and gene transfection were employed. Human HGF cDNA was ligated to PCI-neo. The recombinant plasmid was transfected into COS7 cell line with liposome. The expression of HGF protein was observed by ELISA method. Results PCI-neo-HGF expression vector was analyzed by transient expression,the fragment was same as theoretical value. Compared with GenBank, the conspecific property of HGFcDNA array was 99%. Identification of PCI-HGF by enzyme digestion showed that HGF fragment had been cloned into BamHⅠand SalⅠ sites of PCI-neo vector. The expression of HGF was observed in COS7 cells transfected with PCI-HGF for 12 h; the value of expression was 2 000 ng•L-1 in 36-72 h, then,the value gradually declined. Conclusion The PCI-HGF expression vector is constructed successfully and it can express in transfected COS7 cell line.

Key words: genetic vector, gene expression, COS cells

中图分类号: 

  • Q78