MicroRNA-363 inhibits ovarian cancer progression by inhibiting NOB1

In this study, we investigated the role of microRNA-363(miR-363) in ovarian cancer (OC) progression. MiR-363expression was downregulated in OC patient tissues and four OC cell lines (SKOV3, A2780, OVCAR and HO-8910). Low miR-363 levels were associated with advanced stage, lymph node metastasis, and poor prognosis in OC. MiR-363 overexpression decreased growth, colony formation, migration and invasiveness of SKOV3 cells. In addition, miR-363 overexpression in SKOV3 cells also decreased xenograft tumor size and weight in nude mice. Bioinformatics and dual luciferase reporter assays revealed that miR-363 suppresses expression of NIN1/RPN12 binding protein 1 homolog (NOB1) by binding to the 3'-UTR of its transcript. NOB1 expression inversely correlated with miR-363 levels in OC tissues. Thus miR-363 appears to play a tumor suppressor role in OC by inhibiting NOB1.