首都医科大学学报 ›› 2004, Vol. 25 ›› Issue (2): 154-158.

• 论著·基础研究 • 上一篇    下一篇

人胰岛素样生长因子-1基因的克隆、表达及生物活性分析

祁雅慧1, 王雅梅1, 孙丽翠1, 司杨1, 闫豫东1, 张静宜1, 邴国英2   

  1. 1. 首都医科大学实验中心;2. 美国Kentucky大学解剖和神经生物学部
  • 收稿日期:2003-11-21 修回日期:1900-01-01 出版日期:2004-04-15 发布日期:2004-04-15

Clonging, Expression and Biological Activity of Human Insulin-like Growth Factor-1

Qi Yahui1, Wang Yamei1, Sun Licui1, Si Yang1, Yan Yudong1, Zhang Jinyi1, Bing Guoying2   

  1. 1. Experiment Center, Capital University of Medical Sciences;2. Department of A natomy and Nerobiology, University of Kentucky USA
  • Received:2003-11-21 Revised:1900-01-01 Online:2004-04-15 Published:2004-04-15

摘要: 采用RT-PCR方法,从人扁桃体组织中扩增得到人胰岛素样生长因子-1(IGF-1)cDNA,利用基因重组技术将该基因片段重组于pcDNA3.1(+)真核表达载体上,成功构建了pcDNA/I重组表达载体。应用脂质体介导的基因转移技术将重组质粒体外转染至人脐静脉内皮细胞(HUVEC)。MTT法检测结果表明:重组质粒转染能明显促进内皮细胞的分裂增生。将重组质粒通过脂质体介导,体外转染至人肾细胞293细胞系进行表达,经G418筛选获得稳定表达的重组质粒细胞克隆,表达产物经鸡胚绒毛尿囊膜试验表明有促血管生成活性。此结果为研究IGF-1对血管内皮细胞作用的分子机制,以及利用IGF-1基因治疗肢体及冠状动脉缺血性疾病等的研究奠定了实验基础。

关键词: 人胰岛素样生长因子, 基因克隆, 基因表达

Abstract: The human insulin-like growth factor-1(IGF-1) cDNA was amplified by RT-PCR from human tonsil tissue. Sequenced, the IGF-1 cDNA was inserted into eukaryotic expression vector pcDNA3.1(+). The recombinant plasmid pcDNA/I was transferred into HUVEC cells mediated by liposome. The activity of IGF-1 was detected by MTT. The results showed that IGF-1 protein was expressed in HUVEC cells 72 h after gene transference and it had good biological activity to stimulate HUVEC proliferation. pcDNA/I was transferred into 293 cells mediated by liposome. Screened with G418, we got positive cell which can express recombinant protein of IGF-1 stably. Chick charioallantoic membrane(CAM) bioassay show that the recombinant protein has biological activity to promote blood vessel formation.

Key words: insulin-like growth factor-1, gene clone, gene expression

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