白花丹醌对人肝癌细胞HepG2侵袭和凋亡的影响

Effect of plumbagin on invasion and apoptosis of human hepatocellular carcinoma cell line HepG2

目的探讨白花丹醌对人肝癌HepG2细胞侵袭和凋亡的影响。方法人肝癌HepG2细胞进行体外培养,经不同浓度的白花丹醌处理后,MTT法检测细胞的增殖抑制作用;Transwell细胞体外侵袭实验观察细胞的侵袭能力;流式细胞术Annexin V/PI双染法检测细胞凋亡情况;免疫组化法检测细胞内Bax、Bcl-2蛋白的表达水平。结果 MTT结果显示,与对照组比较,白花丹醌干预组抑制HepG2细胞增殖,并呈剂量-效应关系(P<0.05);Transwell细胞体外侵袭实验显示,随白花丹醌用药浓度的递增,细胞侵袭能力明显下降,尤其以4、8μmol·L^(-1)明显(P<0.01);流式细胞术结果显示,白花丹醌作用HepG2细胞48 h,4、8μmol·L^(-1)组细胞凋亡率均明显高于对照组;免疫组化显示,随着白花丹醌浓度增加,Bax蛋白表达增强,Bcl-2蛋白表达减弱,并呈剂量依赖性(P<0.01)。结论白花丹醌能够抑制HepG2细胞增殖,促进HepG2细胞凋亡,同时具有抑制HepG2细胞侵袭的能力。

Aim To investigate the effect of plumbagin on invasion and apoptosis of human hepatocellular car-cinoma ( HepG2 ) . Methods HepG2 cells were cul-tured in vitro with different concentrations of plumba-gin, then cell proliferation was observed by MTT as-say; cell invasion was observed by transwell invasion assay; cell apoptosis was detected by flow cytometry, and the protein expression of Bax, Bcl-2 was detected by immunocytochemistry. Results MTT results showed that plumbagin could significantly inhibit cell proliferation compared with the control group, and in a dose-dependent manner ( P <0. 05 ) . Transwell inva-sion assay showed that cell invasion was significantly decreased with increasing concentrations of plumbagin&nbsp;( P < 0. 01 ) . Flow cytometry showed that apoptosis rate was significantly higher in 4 , 8 μmol · L-1 group of plumbagin compared with that of the control group ( P<0. 01 ) . Immunocytochemistry showed that, with the increasing concentration of plumbagin, Bax protein expression increased, Bcl-2 protein expression was de-creased, both in a dose-dependent manner ( P <0. 01 ) . Conclusion Plumbagin can inhibit HepG2 cell proliferation and accelerate apoptosis of HepG2 cells, but also has the ability to inhibit HepG2 cell in-vasion. <br> ( P < 0. 01 ) . Flow cytometry showed that apoptosis rate was significantly higher in 4 , 8 μmol · L-1 group of plumbagin compared with that of the control group ( P<0. 01 ) . Immunocytochemistry showed that, with the increasing concentration of plumbagin, Bax protein expression increased, Bcl-2 protein expression was de-creased, both in a dose-dependent manner ( P <0. 01 ) . Conclusion Plumbagin can inhibit HepG2 cell proliferation and accelerate apoptosis of HepG2 cells, but also has the ability to inhibit HepG2 cell in-vasion.