miR-200c对舌癌Tca8113细胞增殖和凋亡的影响

摘要

Objective To investigate the effects of miR-200c on proliferation and apoptosis of tongue squamous cell carcino-ma (TCCS)Tca8113 cells.Methods The mimics of miR-200c were transfected into Tca8113 cells using liposome.The Tca8113 cell proliferation was detected by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT)assay.The flow cytometry as-say was used to determine the cell cycle and the apoptosis rate of Tca8113 cell.The protein expression levels of Bcl-2 and Caspase-3 in Tca8113 cell was detected by Western-blot.Results The 20,40,80 nmol/L miR-200c mimics groups inhibited the growth of Tca8113 cells,the difference compared with the control group showing statistical significance(P <0.05).The greater the miR-200c mimics concentration and the longer duration of action,the more significant the inhibition effect(P <0.05).After 48h transfecting by miR-200c mimics,the Tca8113 cells were arrested in the G0/G1 phases of cell cycle,and the apoptosis rate of the miR-200c mim-ics groups was significantly increased,the difference compared with the control group showing statistical significance(P <0.05);Western blot verified that the expression amount of Bcl-2 protein in the 20,40,80 nmol/L miR-200c groups was significantly lower than that in the control group,while the expression amount of Caspase-3 protein was significantly higher than that in the control group(P <0.05).Conclusion The overexpression of miR-200c might inhibit the proliferation of Tca8113 cell and induces their ap-optosis.%目的：探讨 miR-200c 对人舌鳞状细胞癌 Tca8113细胞增殖和凋亡的影响。方法将 miR-200c 的模拟物通过脂质体转染到人舌鳞状细胞癌 Tca8113细胞内，通过四甲基偶氮唑盐（MTT）法检测细胞增殖能力、流式细胞术检测细胞周期和细胞凋亡率、Western blot 检测半胱氨酸天冬氨酸蛋白酶-3（Caspase-3）和 Bcl-2蛋白的表达。结果与对照组相比，miR-200c 模拟物20、40、80 nmol／L 组的 Tca8113细胞生长受到明显抑制，差异有统计学意义（P ＜0．05），miR-200c 模拟物的浓度越大，作用时间越长，抑制效果越明显（P ＜0．05）；转染 miR-200c 模拟物48 h 后，Tca8113细胞停滞于 G0／G1期，细胞凋亡率显著增加，差异有统计学意义（P ＜0．05）；Western blot 证明20、40、80 nmol／L 组 Bcl-2蛋白表达量明显低于对照组，而 Caspase-3蛋白表达量明显高于对照组（P ＜0．05）。结论miR-200c 过表达可抑制舌癌 Tca8113细胞增殖并诱导细胞凋亡。