RNAi沉默PLCε基因对膀胱癌BIU-87细胞株的增殖调控作用

摘要

Objective To study the proliferation inhibition effect by silencing PLCε gene expression with RNA interference in BIU-87 cells. Methods The specific short hairpin RNA recombinant plasmids were constructed by gene clone technology.The expression level of PLCε protein and mRNA were detected by Western blot and RT-PCR respectively after transfected recombinant plasmids into BIU-87 cells.The influence on proliferation was check by MTT.The changes of proliferating cell nuclear antigen(PCNA)were analyzed by immunocytochemical method,and the distribution of cell cycle was analyzed using flow cytometry. Results After transfected with the specific recombinant plasmids,PCNA expression was decreased 33.08%,and the analysis of cell cycle indicated that cells of G0/G1 phase were increased comparision with(40.75±2.30)%and(40.00±1.76)0A,and its G2/M phase cells(8.16±0.51)%were decreased strikingly compared with group control(31.20±1.76)%and group NP(35.94±1.58)%.Cells were blocked at G0/G1 phase,the cell proliferation was inhibited obviously. Conclusion PLCε may play an important role in proliferation of bladder cancer cells,which could be a potential target of biological treatment on bladder cancer in the future.%目的 探讨RNA干扰技术沉默PLCε基因表达对膀胱癌BIU-87细胞株增殖的抑制作用.方法 构建靶向PLCε基因特异性shRNA重组质粒pGenesil-PLCE,经脂质体介导转染BIU-87细胞株,蛋白质印迹法、RT-PCR方法检测PLCε在癌细胞蛋白及mRNA水平的表达,噻唑盐法观察重组质粒对BIU-87细胞增殖的抑制作用,免疫细胞化学染色分析增殖细胞核抗原(PCNA)含量改变,流式细胞仪检测细胞周期分布.结果 构建的重组质粒pGenesil-PLCε能明显抑制PLCE基因表达,且能明显抑制BIU-87细胞增殖;转染重组质粒0、24、48和72 h后细胞增殖抑制率分别为2.01%、32.85%、39.78%、37.19%,重组质粒组与对照组、阴性质粒组比较,差异有统计学意义(P<0.01).细胞内PCNA表达下调了33.08%;G0/G1期细胞(71.50±4.48)%与空白对照组(40.75±2.30)%、阴性质粒组(40.00±1.76)%比较明显增多,G2/M期细胞(8.16±0.51)%与空白对照组(31.20±1.76)%、阴性质粒组(35.94±1.58)%相比减少.差异均有统计学意义(P<0.01),细胞阻滞于G0/G1期,细胞增殖状态受到明显抑制.结论 PLCε基因在促进膀胱癌细胞增殖中发挥莺要作用,可能成为膀胱癌生物学治疗潜在的分子靶点.