中文摘要：

本文研究了雷氏大疣蛛毒液对人肝癌细胞株HepG2增殖抑制作用及其分子机制。采用XTT法观察到雷氏大疣蛛毒液剂量依赖抑制HepG2细胞增殖；流式细胞仪检测发现，经过雷氏大疣蛛毒液作用的HepG2细胞周期发生明显的选择性改变；RT-PCR方法检测到p21基因表达增强；Western blot检测发现，p21蛋白表达增加。结果提示，雷氏大疣蛛毒液抑制人肝癌细胞HepG2增殖的可能机制之一是使p21基因和蛋白表达增加，G2IM细胞周期被阻滞，从而诱导细胞凋亡。

英文摘要：

This paper focuses on the effect of the venom of the spider Macrothele raveni on the proliferation of human hepatocelluar carcinoma cell line HepG2 and the related molecular mechanism. XTT test showed that the proliferation of HepG2 cells in vitro was inhibited by the spider venom （P〈0.05） in a concentration-dependent manner. By using flow cytometry, it was found that the spider venom caused selective G2/M cell cycle arrest in HepG2 cells. RT-PCR and Western blot indicated the expressions of p21 mRNA and protein in HepG2 cells were obviously up-regulated by the spider venom. The venom of the spider Macrothele raveni inhibited the proliferation of HepG2 cells. These results suggest that the possible mechanism of the spider venom is to activate the expressions of p21 gene and protein and to cause selective cell cycle arrest at GE/M phase, leading to HepG2 cell apoptosis.