title: Ectopic expression of p33ING1bsuppresses proliferation and induces apoptosis in colonic adenocarcinoma cells.
abstract: Inhibitor of growth 1b (ING1b) is considered to be a class II tumor suppressor gene. Although decreased expression of p33ING1bhas previously been reported in colorectal cancer (CRC), its role in CRC has remained to be elucidated. The present study was designed to assess the function of p33ING1bin CRC and to further evaluate its underlying mechanisms of action. Western blot analysis confirmed that ING1b gene expression was significantly decreased in CRC tissues compared with that of adjacent non-tumorous colorectal tissues. Furthermore, recombinant adenovirus-mediated ectopic expression of p33ING1bresulted in growth inhibition, G1-phase cell cycle arrest and apoptosis in the SW480, HT29 and LoVo colorectal adenocarcinoma cell lines. The results suggested that the downregulation of ING1b contributes to colorectal carcinogenesis and that ectopic expression of ING1b may be a potentially useful therapeutic approach for CRC.
authors.affiliation: Department of Gastroenterology, The First Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China.
authors.forename: A I
authors.initials: AI
authors.lastname: Jia
authors.affiliation: Department of Gastroenterology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China.
authors.forename: Yifei
authors.initials: Y
authors.lastname: Lv
authors.affiliation: Department of Gastroenterology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China.
authors.forename: Xueyan
authors.initials: X
authors.lastname: Guo
authors.affiliation: Department of Gastroenterology, The First Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China.
authors.forename: L I
authors.initials: LI
authors.lastname: Ren
authors.affiliation: Department of Gastroenterology, The First Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China.
authors.forename: Jie
authors.initials: J
authors.lastname: Qin
keywords: apoptosis; colorectal adenocarcinoma; p33ING1b; proliferation; recombinant adenovirus