刺参黏多糖诱导人肝癌细胞凋亡的实验研究

目的 观察刺参酸性黏多糖(SJAMP)体外诱导人肝癌细胞HepG2凋亡的情况,并初步探讨SJAMP对HepG2细胞中Bcl-2和nm23-H1表达有何作用,为其能否应用于肝癌的临床治疗提供理论依据和可行性评估.方法 体外培养人肝癌细胞HepG2,用不同浓度的刺参黏多糖(0.25、0.5、1.0、2.0、4.0g/L)培养人肝癌细胞HepG2.采用细胞毒试验(MTT法)检测HepG2细胞抑制率,蛋白印迹法(western blot)检测相关蛋白Bcl-2和nm23-H1 的变化. 结果 (1)MTT细胞毒试验证实SJAMP能明显抑制人肝癌细胞HepG2细胞的生长,且呈时间和浓度依赖性.(2)western blot试验中,与空白组相比,SJAMP处理组、对照组(5-FU)及共同作用组HepG2细胞中Bcl-2蛋白表达均明显降低(P<0.05),nm23-H1蛋白的表达则明显升高(P<0.05). 结论 (1)SJAMP可通过抑制细胞增生并诱导凋亡来抑制人肝癌细胞HepG2的生长;(2)SJAMP可诱导人HepG2细胞中Bcl-2和nm23-H1蛋白含量的改变来发挥其抗肿瘤作用.

Effect of SJAMP on apoptosis of human hepatocellular carcinoma cell line HepG2 and the expression of Bcl-2, nm23-H1 in vitro

Objective Through studying the apoptosis induced by stichopus japonicus acid mucopoly saccharide in the hepatocellular carcinoma cell line HepG2 in vitro, analysing the expression of Bcl-2 and nm-23in HepG2, to provide the theory foundation and its feasibility on whether it can be used for the chemotherapy of hepetocellular carcinoma. Methods The cells of HepG2 were cultured in vitro and treated with SJAMP at different doses(0.25,0. 5,1.0,2.0,4.0 g/L). MTT was used to observe the inhibitory effects of SJAMP on cell growth, Western blotting was used to detect apoptosis, and the apoptosis related change of expression of protein Bcl-2 and nm23-H1. Results (1) MTT identified that SJAMP produced an obvious time-and-dose-dependent inhibitory effect on the HlepG2 cells. (2) Western blot showed that SJAMP could induce the apoptosis of HepG2 cells through changing the expression of the protein of Bcl-2 and nn23-H1 (P<0.05). Conclusion (1)SJAMP produced obvious inhibitory effects on HepG2 cells and induce HepG2 apoptosis. (2)SJAMP can enduce the anti-tumor function in the method of changing the expression of protein Bcl-2 and nm23-H1.