title: Replication-incompetent adenovirus vector-mediated MDA-7/IL-24 selectively induces growth suppression and apoptosis of hepatoma cell Line SMMC-7721.
abstract: In order to investigate the effect of replication-incompetent adenovirus vector expressing MDA-7/IL-24 on tumor growth and apoptosis of human hepatocellular carcinoma (HCC) cell line SMMC-7721 and normal liver cell line L02, the recombinant replication-incompetent Ad.mda-7 virus vector was constructed and infected into the HCC cell line SMMC-7721 and normal liver cell line L02. RT-PCR was performed to examine the expression of MDA-7 mRNA. The concentrations of MDA-7/IL-4 in culture supernatants were determined by using ELISA. MTT and Hoechst staining assay were applied to observe the inhibitory and killing effects of MDA-7 on the HCC cells. By using flow cytometry, the apoptosis, cell cycle and proliferation of SMMC-7721 and L02 cells were measured. The results showed recombinant replication-incompetent virus expressing MDA-7/IL-24 was constructed successfully, and RT-PCR revealed that it could mediate the high expression of the exogenous gene MDA-7/IL-24 in SMMC-7721 and L02 cells. The expression of MDA-7/IL-24 proteins in the culture supernatant was detectable by ELISA. Ad.mda-7 infection induced apoptosis and growth suppression in SMMC-7721 cells and an increased percentage of HCC cells in the G2/M phase of the cell cycle, but not in L02 cells. It was concluded that mda-7/IL-24 gene, mediated with replication-incompetent adenovirus vector, could selectively induce growth suppression and apoptosis in HCC cell line SMMC-7721 but without any toxic side-effect on normal liver line L02.
authors.affiliation: Department of Biliary and Pancreatic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. wcj902@163.com
authors.forename: Congjun
authors.initials: C
authors.lastname: Wang
authors.forename: Xinbo
authors.initials: X
authors.lastname: Xue
authors.forename: Jilin
authors.initials: J
authors.lastname: Yi
authors.forename: Zaide
authors.initials: Z
authors.lastname: Wu
authors.forename: Kun
authors.initials: K
authors.lastname: Chen
authors.forename: Jianwei
authors.initials: J
authors.lastname: Zheng
authors.forename: Wenwei
authors.initials: W
authors.lastname: Ji
authors.forename: Yuan
authors.initials: Y
authors.lastname: Yu
mesh_terms: D000256:Adenoviridae / Q000235:genetics*; D017209:Apoptosis; D006528:Carcinoma, Hepatocellular / Q000473:pathology*; D002453:Cell Cycle; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D004171:Diploidy; D015316:Genetic Therapy / Q000379:methods; D005822:Genetic Vectors; D006801:Humans; D007378:Interleukins / Q000378:metabolism; D008113:Liver Neoplasms / Q000473:pathology*; D009336:Necrosis; D012333:RNA, Messenger / Q000378:metabolism; D013997:Time Factors; D000099180:Interleukin-24
chemical_list: D007378:Interleukins; D012333:RNA, Messenger; D000099180:Interleukin-24