Bai Y.,Cangzhou Centerl Hospital |
Li J.,Hebei province Cangzhou Hospital of integrated traditional and Western Medicine Cangzhou NO. 2 Hospital |
Li J.,Cangzhou Centerl Hospital |
Liu Y.,Cangzhou Centerl Hospital |
Zhang B.,Cangzhou Centerl Hospital
International Journal of Clinical and Experimental Medicine | Year: 2015
MicroRNAs (miRNAs) have emerged as important regulators that potentially play critical roles in various biological processes. Previous studies have shown that miR-615 regulates proliferation and apoptosis in many types of cancers. The biological function of this microRNA in breast cancer remains largely unexplored. In the present study, we found that miR-615 expression was markedly downregulated in breast cancer tissues and breast cancer cells. The enforced expression of miR-615 was able to inhibite the proliferation and anchorage-independent growth of breast cancer cells, while miR-615-in showed the opposite effect. Bioinformatics analysis further revealed AKT2, a putative tumor promoter as a potential target of miR-615. Ectopic expression of miR-615 led to downregulation of AKT2 protein, which resulted in the upregulation of p27 and p21 and the downregulation of cyclin D1. In sum, these results suggest that miR-615 represents a potential anti-onco-miR and participates in breast cancer carcinogenesis by suppressing AKT2 expression. © 2015, Int J Clin Exp Med. All rights reserved.