MicroRNA-296 inhibits colorectal cancer cell growth and enhances apoptosis by targeting ARRB1-mediated AKT activation.

MicroRNA-296 inhibits colorectal cancer cell growth and enhances apoptosis by targeting ARRB1-mediated AKT activation. Oncol Rep. 2018 Oct 18;: Authors: Zhang Z, Zhong X, Xiao Y, Chen C Abstract Colorectal cancer (CRC) is the most commonly diagnosed tumor worldwide. However, the molecular mechanisms and biological processes of CRC remain unknown. The present study used reverse transcription-quantitative polymerase chain reaction to determine the expression levels of microRNA (miR)-296 in CRC cell lines and tissues. In addition, a miR-296 mimic was transfected into CRC cells, and the effects of miR-296 on cell proliferation and apoptosis were explored by MTT assay and flow cytometry. Luciferase assays were also performed to validate arrestin β1 (ARRB1) as a miR-296 target in SW480 and HCT-116 cells. The results demonstrated that miR-296 is a critical tumor suppressor which was downregulated in CRC patients. Increased expression levels of miR-296 were positively associated with a longer survival time of CRC patients. In addition, it was demonstrated that ARRB1 is a direct downstream target of miR-296. Upregulation of miR-296 in SW480 and HCT-116 cells resulted in suppressed cell growth and increased cell apoptosis through an ARRB1-dependent mechanism. Furthermore, the molecular mechanisms underlying the antitumor effect of miR‑296 in CRC are at least in part due to the inactivation of the RAC-α serine/threonine-protein kinase (AKT)...
Source: Oncology Reports - Category: Cancer & Oncology Tags: Oncol Rep Source Type: research