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• 基础研究 • 上一篇    下一篇

趋化因子受体CXCR4小分子干扰RNA表达载体的构建及表达

刘艳1, 王珑2, 张大维3, 赵德明1   

  1. (1.中国农业大学动物医学院, 北京 100039;2.北京市实验动物研究中心, 北京 100012;3. 吉林大学基础医学院实验动物中心, 吉林 长春 130021)
  • 收稿日期:2007-03-28 修回日期:1900-01-01 出版日期:2007-11-28 发布日期:2007-11-28
  • 通讯作者: 赵德明

Construction and expression of small interfering RNA expression vector of CXCR4

IU Yan1,WANG Long2,ZHANG Da-wei3,ZHAO De-ming1   

  1. (1. College of Animal Medicine,China Agriculture University,Beijing 100039,China;2. Beijing Laboratory Animal Science Center,Beijing 100012,China;3.Center of Laboratory Animal Science,School of Basic Medical Sciences,Jilin University,Changchun 130021,China)
  • Received:2007-03-28 Revised:1900-01-01 Online:2007-11-28 Published:2007-11-28
  • Contact: ZHAO De-ming

摘要: 目的: 构建趋化因子受体CXCR4小分子干扰RNA(siRNA)表达载体,研究其对CXCR4基因表达的沉默效果,探索抗人免疫缺陷病毒-1 (HIV-1)治疗的新途径。方法: 根据软件设计针对CXCR4基因的siRNA序列,经退火成互补双链,克隆到PsilencerM3.1-H1 neo载体中,经测序鉴定插入序列的正确性。转染MT4细胞后,采用RT-PCR及流式细胞仪方法检测转染siRNA质粒的实验组、转染空载体的阴性对照组和空白细胞对照组间抑制基因表达情况。结果: PCR及琼脂糖凝胶电泳检测重组质粒PsilencerM 3.1-H1- siRNA neo,有正确的特异性片段,DNA测序也证明具有正确序列;该载体转染MT4细胞48 h后,能明显抑制CXCR4基因表达,其表达抑制率为70%,与空白对照组和阴性组比较差异有显著性(P<0.05)。结论: 成功构建趋化因子受体CXCR4的siRNA表达载体。

关键词: 趋化因子, 人免疫缺陷病毒1型, RNA干扰, 小分子RNA

Abstract: To construct the recombinant plasmid carrying small interfering RNA(siRNA) to CXCR4 and observe dumbness effect of chemokine receptor gene CXCR4 suppression by RNA interference(RNAi),and explore the new method of more efficacious therapeutic possibilities for HIV-1. Methods Small interfering RNAs targeting CXCR4 gene were designed by using software.The complement form was obtained by annealing and interted into vector Psilencer3.1-H1neo.After sequencing,MT4 cells were transfected using the plasmid vector.RT-PCR and flow cytometry detection were used to evaluate the suppression of CXCX4 expression in different groups.ResultsThe recombinant plasmid had the correct special fragments and DNA sequence detected by PCR,electrophoresis and DNA sequencing;The siRNA obviously suppressed the expression of CXCR4.When transfected with plasmid vector for 48 h,the inhibitory rate was 70%,compared with control and negative groups,there were significant differences (P<0.05). Conclusion The siRNA expression vector of CXCR4 is constructed successfully.

Key words: chemokine, HIV-1, RNA interference, small interfering RNA

中图分类号: 

  • Q78