上调miR-143表达对CasKi人宫颈鳞癌细胞系增殖与凋亡的影响

目的探讨miR-143对CasKi宫颈鳞癌细胞增殖与凋亡活性影响。方法应用荧光定量RT-PCR法检测miR-143在人宫颈鳞癌组织中表达水平,以及miR-143在CasKi细胞株中表达水平与变化;人工合成miR-143模拟体转染CasKi宫颈鳞癌细胞系,采用流式细胞技术、MTT等实验方法探讨上调miR-143表达对CasKi癌细胞增殖活性与凋亡影响。结果宫颈鳞癌组织与宫颈鳞癌细胞株CasKi中miR-143表达水平较正常宫颈组织明显下调,其中2例鳞癌组织未能检测出miR-143表达。miR-143 mimics转染组miR-143表达显著高于空白对照组;MTT检测结果表明miR-143 mimics转染组中细胞增殖抑制明显,且抑制效应自转染48 h开始显现。细胞周期检测结果显示miR-143 mimics转染组G0/G1期细胞明显增多,S期细胞减少,组间差异有统计学意义(P0.05)。荧光TUNEL检测结果亦显示miR-143 mimics转染组细胞凋亡率增加(9.45±2.31)%,高于阴性对照组(4.03±1.35)%与空白对照组(3.85±1.61)%,组间差异具有统计学意义(P0.05)。结论上调miR-143表达可抑制宫颈鳞癌细胞增殖活性,影响宫颈鳞癌细胞周期和诱导宫颈鳞癌细胞凋亡。

Effects of up-regulated expression of microRNA-143 on cell proliferation and apoptosis of CasKi cells

Purpose To investigate the effects of up-regulated expression of microRNA-143(miR-143) on cell proliferation and apoptosis of cervical squamous carcinoma cell lines CasKi.Methods Synthetic miR-143 mimics was transfected into CasKi cell line by lipofectamine.The expression of miR-143 in cervical squamous cell carcinoma tissues and the expression change of miR-143 in the CasKi cell line was measured by real time RT-PCR.Cellular growth and proliferation capacity were assayed by the methyl thiazolyl tetrazolium...