Hepatocellular carcinoma is one of the most common tumors in the world.The purpose of the present study was to investigate the inhibitory effects of adenoviral transduction of human melanoma differentiation-associated gene-7(MDA-7)gene on hepatocellular carcinoma,so as to provide a theoretical basis for gene therapy of the disease.The human MDA-7 gene was cloned into replication-defective adenovirus specific to HepG2 cells using recombinant virus technology.RT-PCR and Western blotting assays were used to determine the expression of human MDA-7 mRNA and MDA-7 protein in HepG2 cells in vitro.Induction of apoptosis by overexpression of the human MDA-7 gene was determined by flow cytometry.In-vivo efficacy of adenoviral delivery of the human MDA-7 gene was assessed in nude mice bearing HepG2 cell lines in vivo by determining inhibition of tumor growth,VEGF and CD34 expression,and microvascular density(MVD).The results showed that AdGFP/MDA-7 induced apoptosis of HepG2 cells in vitro and significantly inhibited tumor growth in vivo(P < 0.05).The intra-tumoral MVD decreased significantly in the treated tumors(P < 0.05).We conclude the recombination adenovirus AdGFP/MDA-7 can effectively express biologically active human MDA-7,which leads to inhibition of hepatocellular carcinoma growth.
Xinting Pan Liqun Wu Jingyu Cao Weidong Guo Zusen Wang Bing Han Weiyu Hu
