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siRNA对骨肉瘤细胞MDM2的表达及细胞增殖的抑制作用

吕佳音1,吴丹凯1,徐春华2,张舵舵1,吴丹华*,高忠礼1,赵燕颖3   

  1. 1. 吉林大学中日联谊医院骨科,吉林 长春 130033; 2.吉林大学第二医院骨科,吉林 长春 130041;3.吉林大学基础医学院病理生理学教研室,吉林 长春 130021
  • 收稿日期:2006-09-25 修回日期:1900-01-01 出版日期:2008-05-28 发布日期:2008-05-28
  • 通讯作者: 赵燕颖

Inhibitory effects of siRNA on MDM2 expression and cell proliferation in osteosarcoma cell line

LU Jia-yin1,WU Dan-kai1,XU Chun-hua2,ZHANG Duo-duo1,WU Dan-hua*,GAO Zhong-li1,ZHAO Yan-ying3   

  1. 1.Department of Orthopedics,China-Japan Union Hospital,Jilin University,Changchun 130033,China;2.Department of Orthopedics, Second Hospital,Jilin University,Changchun 130041,China;3.School of Basic Medical Sciences,Jilin University,Changchun 130021,China
  • Received:2006-09-25 Revised:1900-01-01 Online:2008-05-28 Published:2008-05-28
  • Contact: ZHAO Yan-ying

摘要: 目的: 研究siRNA对人骨肉瘤U20S细胞MDM2基因表达及肿瘤细胞增殖的抑制作用。 方法: 构建可表达针对MDM2的siRNA质粒(PGCsilencerTM-MDM2-siRNA)。转染siRNA MDM2(简称siMDM2),阴性对照质粒到U20S,并设只加转染试剂作空白对照组,用逆转录聚合酶链反应(RT-PCR)和Western blotting法检测siMDM2对MDM2基因和蛋白表达的抑制作用,并用MTT法检测siMDM2对细胞增殖的抑制作用。 结果: RT-PCR结果显示,转染siMDM2-1和 -2组MDM2的mRNA表达量分别下调到空白对照组的32.61%和39.06%;Western blotting结果显示,转染siMDM2-1和 -2组蛋白表达量下调到空白对照组的35.76%和42.20%;转染阴性对照质粒的MDM2基因和蛋白与转染试剂组比较差异均无显著性(P>0.05)。MTT结果显示,转染siMDM2后细胞生长受到明显抑制,与转染试剂组比较差异具有显著性(P<0.05),阴性对照组抑制率与转染试剂组比较差异无显著性(P>0.05)。结论:siRNA可以有效地抑制U20S细胞中MDM2的表达,并抑制细胞增殖。

关键词: MDM2, 骨肉瘤, 逆转录聚合酶链反应

Abstract: Abstract:Objective To study the inhibitory effects of siRNA on MDM2 expression in osteosarcoma cell line U20S and cell proliferation. Methods siRNA targeting MDM2 (PGCsilencerTM-MDM2-siRNA) was constructed and transfercted into U20S cells.Meanwhile,control siRNA was transfected and the transfection agent was used as the comparison.MDM2 gene and protein expressions were measured using RT-PCR and Western blotting.Cell proliferation was measured with MTT assay.Results RT-PCR and Western blotting results showed that MDM2 mRNA expression levels were reduced to 32.61% and 39.06% after being transfected with siMDM2-1 and siMDM2-2; MDM2 protein expression levels decreased to 35.76% and 42.20%,respectively.The difference betweencontrol siRNA and liposome group was not obvious(P>0.05).MTT result showed that the cell growth was inhibited by being transfected with siMDM2,the difference was obvious compared with liposome group(P<0.05).The difference was not significant between control siRNA and liposome group (P>0.05).Conclusion siRNA  can effectively down-regulate MDM2 expression in U20S cell line and inhibit the cell proliferation.

Key words: MDM2, osteosarcoma, rverse tanscriptase polymerase chain reaction

中图分类号: 

  • R738.7