RMP基因沉默对肝癌SMMC-7721细胞增殖和迁移能力的影响

目的:建立RMP(RPB5-mediating protein)基因沉默的稳定细胞株,研究RMP小干扰RNA(small interfering RNA, siRNA)对人肝癌SMMC-7721细胞增殖和迁移的抑制作用.方法:首先,体外合成3条RMP基因的siRNA,并转染到SMMC-7721细胞中,RT-PCR检测3条siRNA对RMP基因表达的抑制作用,筛选出最佳干扰序列;然后,pGPU6-Neo-RMP-484真核表达载体转染,G418筛选出稳定干扰RMP基因的细胞株,RT-PCR法检测该稳定细胞株中RMP基因的干扰效率,MTT法检测RMP-siRNA对SMMC-7721细胞增殖及细胞黏附能力的影响,划痕实验检测细胞迁移能力的变化.结果:利用RNA干扰技术成功建立了RMP基因下调的稳定细胞株,与SMMC-7721细胞对照组比较,其RMP mRNA表达水平下调了(83.67±2.56)%.稳定转染siRNA的细胞株细胞增殖受到抑制,增殖抑制率可达(74.33±0.58)%.稳定转染细胞株的细胞黏附能力有所增加,迁移率则相应降低.结论:成功筛选出了稳定转染RMP-siRNA重组载体的细胞株.pGPU6-Neo-RMP-484重组载体能有效抑制RMP基因在肝癌SMMC-7721细胞内的表达,可作为RMP分子机制研究的细胞模型.RMP基因的下调能有效抑制肝癌细胞SMMC-7721的增殖,使其黏附率增加,同时细胞的迁移率降低.

Effects of silencing RPB5-mediating protein(RMP) gene on cell proliferation and migration of liver cancer SMMC-7721 cells

Objective:To establish the RPB5-mediating protein(RMP)-silenced stable cell lines and study the inhibitory effects of small interfering RNA(siRNA) targeting RMP gene on the proliferation and migration of human hepatoma SMMC-7721 cells.Methods:Three RMPi siRNAs were designed and synthesized in vitro and transfected into SMMC-7721 cells.The inhibitory effect of siRNA on RMP gene expression was measured by RT-PCR to select the best siRNA.The expression vector pGPU6-Neo-RMP-484 was transfected into SMMC-7721 ce...