Survivin短发夹状RNA对宫颈癌细胞系HeLa增殖和凋亡的影响

Influence of survivin short hairpin RNA on cell proliferation and apoptosis in cervical cancer cell line HeLa

目的:观察survivin基因短发夹状RNA(short hairpin RNA,shRNA)对宫颈癌细胞系HeLa增殖和凋亡的影响。方法:通过脂质体介导的细胞转染技术将含人survivin基因shRNA的重组真核表达质粒pSilenc-er2.1-s2转染宫颈癌细胞系HeLa,G418筛选阳性克隆,半定量PCR、Western blot分别检测survivin mRNA和蛋白表达,四甲基偶氮唑蓝(MTT)比色法绘制细胞生长曲线,流式细胞仪检测细胞周期变化,流式细胞仪、Hoechst染色观察细胞凋亡情况。结果:G418筛选34天后出现阳性克隆,与转染阴性对照质粒(HeLa-NC)、空载质粒(HeLa-U6 neo)及未转染(HeLa)细胞比较,转染pSilencer2.1-s2质粒者survivin mRNA和蛋白表达明显下降,表达抑制率分别为:62.8%和60.1%;细胞增殖受到抑制,最高细胞生长抑制率为:(57.8±2.1)%(P<0.05);细胞周期发生显著变化,细胞被阻滞于G0/G1期,占(72.7±3.1)%(P<0.05),G2/M期明显减少,占(5.1±2.9)%(P<0.05);细胞凋亡率为:(29.2±1.4)%,明显升高(P<0.05)。结论:Survivin基因shRNA可通过下调HeLa细胞中survivin的表达,抑制细胞增殖并诱导细胞凋亡。

Objective:To investigate the influence of survivin short hairpin RNA(shRNA) on cell proliferation and apoptosis in cervical cancer cell line HeLa.Methods:Having transfected the recombined eukaryotic expression plamid pSilencer 2.1-s2 which concerned human survivin gene shRNA into human cervical cancer cell line HeLa by using LipofectAMINE2000,then selected the positive clones with G418,detected the expression of survivin mRNA and its protein by semi-quantitative RT-PCR and Western blot respectively,protract...