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• 基础研究 • 上一篇    下一篇

逆转录病毒载体介导shRNA对人胚胎肾细胞中p53基因的沉默作用

刘 扬,马淑梅,刘晓冬*,金顺子,徐瑞明,武 宁,赵银龙,龚守良,刘树铮   

  1. 吉林大学公共卫生学院 卫生部放射生物学重点实验室,吉林 长春130021
  • 收稿日期:2005-05-25 修回日期:1900-01-01 出版日期:2006-03-28 发布日期:2006-03-28
  • 通讯作者: 刘晓冬*

Small hairpin RNA and retroviral vector-mediatedsilencing of p53 in HEK293 cells

LIU Yang, MA Shu-mei, LIU Xiao-dong*, JIN Shun-zi , XU Rui-ming, WU Ning, ZHAO Yin-long, GONG Shou-liang, LIU Shu-zheng   

  1. MH Radiobiology Research Unit, School of Public Health, Jilin University, Changchun 130021,China
  • Received:2005-05-25 Revised:1900-01-01 Online:2006-03-28 Published:2006-03-28
  • Contact: LIU Xiao-dong*,

摘要: 目的:检测逆转录病毒载体介导的小发夹环RNA(small hairpin RNA,shRNA)对人胚胎肾细胞(HEK293)中p53基因的干扰作用。方法:将人H1启动子由XholⅠ和EcoRⅠ酶切位点插入CMV启动子上游,人CD4基因替代匀霉素抗性基因,作为检测标志。针对人野生型p53基因设计的shRNA被连接在H1启动子的下游,构建含有shRNA的逆转录病毒载体LTRH1-p53,即RNAi表达载体;利用流式细胞术检测逆转录病毒感染HEK293细胞72 h后细胞内P53蛋白水平的变化。结果:成功构建LTRH1-p53载体,该载体感染HEK293细胞后72 h,与感染空病毒载体LTRH1组相比,P53蛋白表达降至空病毒载体LTRH1组的69%(P<0.01)。结论:LTRH1-p53表达载体成功使p53基因沉默,shRNA表达载体的使用为基因功能研究提供有力工具。

关键词: 基因, p53, 逆转录病毒载体, shRNA

Abstract: Objective To establish a retroviral vector of small hairpin RNA (shRNA) expression in which the sense and antisense sequences targeting wild type human p53 were linked together with a 9-nucleotide loop to detect the interfering role of p53 gene in mammalian cells. Methods The human H1 promoter was inserted into the upstream of the cytomegalovirus (CMV) promoter by using Xhol I and EcoR I sites. The resistanting hygromycin gene was replaced with the human CD4 gene. These oligonucleotides were annealed and ligated the downstream of the H1 promoter. All oligonucleotides were synthesized with Qiagen. HEK293 was infected with the shRNA vector and the expression of p53 was detected 72 h after infection by flow cytometry. Results The retroviral vector was successfully constructed and the expression of P53 protein was definitely suppressed in the HEK293 72 h after infection. Conclusion The applying of shRNA expression vector is possible to provide a prompt and promising method for evaluating the gene function of mammalian cells.

Key words: genes, p53, retroviral vector, shRNA