微小RNA-1180转染对肾癌细胞生长的影响

目的 探讨微小RNA-1180(miR-1180)转染对肾癌细胞系786-O和ACHN生长的影响.方法 肾癌细胞分为两组:dsControl组和miR-1180组.实时定量(qRT)-PCR检测p21 mRNA的表达变化.Western blot检测p21、细胞周期蛋白依赖性激酶(CDK)4、CDK6和CyclinD1蛋白的表达变化.流式细胞术(FCM)检测细胞周期变化,使用多靶扫描法(MTS)和集落形成实验检测细胞活力和增殖能力.结果 qRT-PCR结果显示,与对照组相比,转染miR-1180后786-O和ACHN细胞中p21 mR-NA水平分别上调2.54倍(P＜0.01)和2.49倍(P＜0.01).p21蛋白表达趋势与qRT-PCR结果相符,CDK4、CDK6和CyclinD1蛋白的表达明显下调.FCM结果显示,转染miR-1180后,位于G0/G1期的细胞比例明显增大,而位于S期和G2/M期的细胞比例明显下降,表明细胞周期被阻滞在Go/G1期.MTS结果显示,与dsControl组相比,转染miR-1180后,两种肾癌细胞活力明显降低.集落形成实验显示,miR-1180组的集落数数量明显较少,表明细胞增殖能力降低.结论 miR-1180能显著激活肾癌细胞中p21蛋白的表达,并抑制肾癌细胞786-O和ACHN的生长.

Effect of microRNA-1180 transfection on growth of renal cell carcinoma

Objective To investigate the effect of microRNA-1180 transfection on the growth of renal cell carcinoma lines 786-O and ACHN.Methods The renal carcinoma cells were divided into the two groups:control group (transfecting dsControl) and experimental group (transfecting miR-1180).The expression change of p21 mRNA was detected by qRT-PCR.Western blot was conducted to analyze the expression changes of p21,CDK4,CDK6 and CyclinD1 proteins.Flow cytometry (FCM) was used to detect the cell cycle change.The MTS assay was conducted to detect the cell viability and the colony forming assay was performed to examine the cell proliferation ability.Results The qRT-PCR results showed that compared with the negative control dsControl group,after miR-1180 transfection,the expression level of·p21 mRNA in 786-O and ACHN cells was up-regulated to 2.54-fold and 2.49-fold respectively(P＜0.01).The expression trend of p21 protein was consistent with qRT-PCR results.The expression of CDK4,CDK6 and CyclinD1 proteins were significantly down-regulated.The FCM results showed that the proportion of cells in G0/ G1 phase was significantly increased after transfection of miR-1180,but the proportion of cells in S phase and G2/M phase was decreased significantly,indicating that the cell cycle was arrested in G0/G1 phase.The MTS assay results showed that compared with the dsControl group,the viability of the two kinds of renal carcinoma cells was significantly decreased.The colony formation assay showed that the number of colonies formed in the miR-1180 group was smaller,indicating the proliferation ability of miR-1180 transfected cells was decreased.Conclusion miR-1180 can significantly activate the p21 protein expression and inhibit the growth of renal carcinoma cell lines 786-O and ACHN.