期刊
CELL CYCLE
卷 8, 期 10, 页码 1567-1570出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/cc.8.10.8489
关键词
hepatocellular carcinoma; RNA interference; beta-catenin; cell cycle; cyclin A; cyclin E
类别
Wnt/beta-catenin signaling pathway and cell cycle play the key roles during the genesis and development of hepatocellular carcinoma (HCC). The cytoplasmic protein beta-catenin is a multifunctional protein and a central molecule in the Wnt signaling pathway. Cell cycle is regulated by a a series of regulatory factors. Current researches indicated that expression of cyclin D1 and c-myc decreased after silencing beta-catenin gene in HCC, but it is unclear if other cyclins are affected. To determine the relation, small interference RNA(siRNA) against beta-catenin was transfected into HCC cell line HepG(2), and cell cycle and cyclin A and cyclin E protein expression were detected. We demonstrated that cell cycle was arrested in G(0)/G(1) at 72 h after the transfection and with the time passing, the cell cycle began to transfer from G(0)/G(1) to G(2)/M through S and had a trend to revert at 96 h. In addition, beta-catenin protein expression was decreased at both 72 and 96 h, although the level was slightly higher at 96 h than that at 72 h. However, cyclin A and cyclin E protein expression increased at 72 h and decreased at 96 h. These findings suggest that silencing beta-catenin gene may induce the changes of cell cycle and cyclin A and cyclin E expression. Wnt/beta-catenin signaling pathway probably takes part in the genesis and development of HCC through regulating cell cycle and the expression of cyclin A and cyclin E.
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