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山东大学学报(医学版) ›› 2015, Vol. 53 ›› Issue (6): 23-27.doi: 10.6040/j.issn.1671-7554.0.2015.083

• 基础医学 • 上一篇    下一篇

miR-485-5p靶向调控Survivin基因对人结直肠癌HCT116细胞侵袭性的影响

曾仁仁, 张俊华, 张银旭   

  1. 辽宁医学院附属第一医院普外科, 辽宁 锦州 121001
  • 收稿日期:2015-01-23 修回日期:2015-04-23 出版日期:2015-06-10 发布日期:2015-06-10
  • 通讯作者: 张俊华。 E-mail:lyzhangjunhua@163.com E-mail:lyzhangjunhua@163.com

The role of miR-485-5p in human colorectal cancer HCT116 cell invasion by regulating survivin expression

ZENG Renren, ZHANG Junhua, ZHANG Yinxu   

  1. Department of General Surgery, First Affiliated Hospital of Liaoning Medical University, Jinzhou 121001, Liaoning, China
  • Received:2015-01-23 Revised:2015-04-23 Online:2015-06-10 Published:2015-06-10

摘要: 目的 探讨miR-485-5p对人结直肠癌HCT116细胞中Survivin基因的靶向调控作用以及对细胞侵袭性的影响。方法 培养HCT116细胞,应用免疫荧光检测Survivin基因在细胞中的表达。采用生物信息学方法对miR-485-5p和Survivin基因的靶向匹配关系进行预测,并应用双荧光素酶报告基因系统鉴定。脂质体2000转染miR-485-5p模拟物后,Real-time PCR检测miR-485-5p和Survivin基因的表达,Western blotting检测Survivin蛋白的表达,Transwell小室检测HCT116细胞体外的侵袭性。结果 倒置相差显微镜下可见细胞均匀分布,形态规则均一;细胞免疫荧光显示胞质内有Survivin蛋白的表达。靶基因预测软件miRanda和TargetScan显示miR-485-5p和Survivin基因匹配良好,双荧光素酶报告基因系统鉴定发现miR-485-5p能够结合Survivin mRNA 3'UTR,并有效抑制其表达。Real-time PCR和Western blotting检测结果显示,过表达miR-485-5p能够导致Survivin基因表达的下降。Transwell实验结果显示,miR-485-5p的过表达能够抑制HCT116细胞的侵袭。结论 miR-485-5p通过靶向作用于Survivin mRNA 3'UTR能够负性调控Survivin基因的表达,并能够抑制人结直肠癌HCT116细胞的侵袭。

关键词: 微小RNA, 结直肠肿瘤, 生存素, HCT116细胞

Abstract: Objective To identify the role of miR-485-5p in human colorectal cancer HCT116 cell invasion. Methods HCT116 cells were cultured in vitro, and cellular morphology was observed with phase contrast microscope. The miR-485-5p was predicted with bioinformatics and identified with dual luciferase report system. Expressions of miR-485-5p and survivin were determined with Real-time PCR and Western blotting after transfection of miR-485-5p mimics. The invasion of HCT116 cells was detected in vitro with transwell chamber. Results Survivin expression was positive as detected by immunofluorescence cytochemistry. Dual luciferase reporter system indicated that miR-485-5p inhibited survivin expression by binding to 3'UTR of survivin mRNA. Real-time PCR and Western blotting showed that over-expression of miR-485-5p down-regulated survivin expression. The invasion of HCT116 cells was suppressed by over-expression of miR-485-5p. Conclusion The miR-485-5p may negatively regulate survivin expression by binding to its 3'UTR in human colorectal cancer HCT116 cells and inhibit cell invasion.

Key words: Colorectal neoplasm, MiRNA, Survivin, HCT116 cells

中图分类号: 

  • R735.3
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