摘要
目的探讨茉莉酸甲酯诱导人肝癌细胞HepG2发生凋亡的作用机制.方法琼脂糖凝胶电泳检测HepG2细胞凋亡,RT-PCR检测HepG2细胞中Bcl-2、BaxmRNA表达,免疫细胞化学检测HepG2细胞Bcl-2、Bax蛋白表达.结果MeJA作用HepG2细胞48h后:DNA琼脂糖凝胶电泳可见明显典型"梯"状条带;细胞Bcl-2mRNA表达水平明显下降(P<0.05)而BaxmRNA表达水平明显增高(P<0.05);Bcl-2蛋白在胞浆中表达水平明显降低(P<0.01)而Bax蛋白表达水平显著增加(P<0.01).结论茉莉酸甲酯通过降低抑凋亡相关基因Bcl-2mRNA及蛋白的表达,上调促凋亡相关基因BaxmRNA及蛋白的表达,从而诱导HepG2细胞凋亡的发生.
Objective To study the mechanism of MeJA induced HepG2 cells apoptosis.Methods We detected cell apoptosis by AGE,used RT-PCR to detect the mRNA expression of Bcl-2,Bax in HepG2 cells,and detected protein expression of Bcl-2,Bax in HepG2 cells by immunocytochemistry.Results After MeJA acting on HepG2 cells for 48 h:Obviously typical ladder straps was found in DNA AGE;the mRNA expression of Bcl-2 decreased(P〈0.05) while the mRNA expression of Bax obviously increased(P〈0.05).the protein expression of Bcl-2 in endochylema is obviously lower than the expression in control group(P〈0.01);while the protein expression of Bax increased compared with control group(P〈0.01).Conclusions MeJA can induce HepG2 cells apoptosis by decreasing the mRNA and protein expression of apoptosis-depressing gene Bcl-2,and in creasing the mRNA and protein expression of apoptosis-promoting gene Bax.
出处
《昆明医学院学报》
2009年第12期33-37,共5页
Journal of Kunming Medical College