胃癌组织和SGC-7901细胞中nucleostemin基因表达的实验研究

目的检测nucleostemin(NS)基因在胃癌组织和胃癌SGC-7901细胞中的表达情况。方法21例胃癌手术标本,提取胃癌组织和胃癌SGC-7901细胞株总RNA,用半定量RT-PCR方法检测胃癌组织和SGC-7901中NS基因的表达情况。用脂质体法将PCDNA4/C-NS-silencer质粒及空载体PCDNA4/C-vector质粒分别转染SGC-7901细胞,分别命名为silencer组和vector组,未转染的SGC-7901细胞记为normal组,RT-PCR方法检测NS基因表达量。用MTT法检测3组细胞的生长增殖情况。结果胃癌组织和SGC-7901细胞中皆有NS基因表达。定性分析显示,与vector组和normal组比较,silencer组细胞趋于分化,NS基因表达量下降。细胞培养24 h、48 h、72 h后,si-lencer组和vector组细胞增殖抑制率间差别均有统计学意义(P<0.01)。结论胃癌组织和SGC-7901细胞中有NS基因表达;NS基因特异性RNA干扰使NS基因表达量下降,抑制SGC-7901细胞株体外增殖。

Experimental Study on Nucleostemin Gene Expression in Gastric Cancer Tissues and SGC-7901 Cells

Objective To detect the expression of nucleostemin(NS) gene in gastric cancer(GC) tissues and SGC-7901 cells,and the effect of NS on GC tissues and cell proliferation(CP).Methods Total RNA was isolated from GC tissues and SGC-7901 cell strains,NS gene expressions in GC tissues and SGC-7901 cells were determined by RT-PCR;By liposome transfection law,SGC-7901 cells were transfected with PCDNA4/C-NS-silencer plasmid or no-load carrier PCDNA4/C-vector plasmid,which were named as silencer group and vector group...