信号分子在Genistein诱导人肝癌细胞凋亡中的作用  

Effect of singal molecules on apoptosis incuced by Genistein in hepatocarcinoma cells

作　　者：魏思忱 白文元[2] 田媛[2] 冯子南[2] 刘云燕[2] 

机构地区：[1]沧州中心医院消化内科,河北沧州061001 [2]河北医科大学第二医院消化内科,河北石家庄050000

出　　处：《临床肝胆病杂志》2009年第1期26-28,共3页Journal of Clinical Hepatology

基　　金：河北省卫生厅资助项目(04009)

摘　　要：目的通过检测三羟异黄酮诱导肝癌细胞凋亡过程中信号分子的表达,以期探讨其诱导凋亡的分子机制。方法应用体外细胞培养技术,三羟异黄酮处理后行HE染色;采用免疫细胞化学和RT-PCR分别检测癌细胞凋亡过程中信号分子的表达情况。结果(1)三羟异黄酮作用后可见凋亡细胞,随着浓度的增加,凋亡率逐渐升高;(2)survivin蛋白的表达下调,caspase-3的蛋白表达上调;(3)survivin基因的表达逐渐降低,而caspase-3在基因水平的表达有逐渐增加趋势,但无统计学差异(P>0.05)。结论三羟异黄酮能诱导人肝癌细胞的凋亡;在此凋亡过程中,信号分子survivin在基因与蛋白水平呈现一致性的表达降低,caspase-3在蛋白水平明显上调,但其基因表达无明显变化。推测其作用靶点可能是在转录后水平。Objective To investigate the molecular mechanism of apoptosis induced by genistein in hepatocellutar cells through detecing expressions of caspase - 3 and survivin. Methods Human hepatocellular cells were treatec with different concentration of genistein, the morphology of apoptosis cells were observed by nicroscopy, the expressions of caspase - 3 and survivin were identified by immuno - cytochem cal staining method and RT - PCR. Results Hepatocarcinoma cells present some typical morphologic features of apoptosis, The apoptotic rate was increased with concentration. The expression of survivin protein and gene were lower in treated groups, The expression of caspase - 3 protein vas up regulated, while the mRNA expression of caspase - 3 was not changed. Conclusion Genistein can induced apoptosis of hepatocarcinoma cells, which accombied by downregulation of survivm gene and upregulation of caspase - 3 ptotein, the molecular event of cell apoptosis may be dependent on the activaton of caspase - 3 enzyme rather than the expression of caspase - 3 gene.

关 键 词：肝癌细胞 凋亡 信号分子 

分 类 号：R735.7[医药卫生—肿瘤]