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EGCG对肝癌细胞HepG2凋亡及脂肪酸合酶表达的影响
被引:8
作者:

赵刚
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机构: 西安交通大学医学院第二附属医院消化内科

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史海涛
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机构: 西安交通大学医学院第二附属医院消化内科

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鲁晓岚
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机构: 西安交通大学医学院第二附属医院消化内科

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[1] 西安交通大学医学院第二附属医院消化内科
关键词:
表没食子儿茶素没食子酸酯;
凋亡;
脂肪酸合酶;
肝癌细胞;
Bcl-2;
Bax;
D O I:
暂无
中图分类号:
R735.7 [肝肿瘤];
R273 [中医肿瘤科];
学科分类号:
100112 [医学生物化学与分子生物学];
100502 [中医临床基础];
摘要:
目的观察表没食子儿茶素没食子酸酯(EGCG)对人肝癌HepG2细胞增殖抑制、凋亡诱导及对凋亡相关基因和脂肪酸合酶(FASN)表达的影响,明确其可能的抗肝癌作用机制。方法体外培养HepG2人肝癌细胞株,随机分为对照组(无药物干预)及80、120、160μmol/L EGCG组,作用48h后,荧光显微镜观察Hoechst33258染色结果并用流式细胞术定量分析细胞凋亡发生情况;用RT-PCR方法检测FASN及凋亡相关基因Bcl-2和Bax的表达。结果EGCG组Hoechst33258染色可见凋亡细胞核浓染,亮度明显加深或有染色质边集现象,亦可见典型的凋亡小体;流式细胞术检测发现,经160μmol/L EGCG作用48h后,肝癌细胞凋亡率最高可达28.6%;半定量RT-PCR结果显示,经EGCG作用48h后肝癌细胞中凋亡相关基因Bcl-2表达量明显下降,同时FASN表达量亦随EGCG浓度的增大而显著降低。Bax表达无明显变化。结论 EGCG可抑制人肝癌细胞HepG2的细胞增殖,并诱导凋亡发生,此作用可能与其抑制细胞凋亡相关基因Bcl-2以及内源性FASN的表达有关。
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页码:245 / 248
页数:4
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