MicroRNA-628-5p inhibits cell proliferation in glioma by targeting DDX59.

Recent study has reported that microRNA-628-5p (miR-628-5p) is involved in the development of epithelial ovarian cancer; however, the mechanisms of miR-628-5p in glioma remain unclear. In this study, we explored the potential biological roles of miR-628-5p in glioma. First, we found that miR-628-5p was decreased in the tissues and cells (U87 and T98) of glioma. Second, overexpressing miR-628-5p reduced the ability of glioma cells' proliferation and induced glioma cells' cycle arrest in G1. Then, we found that miR-628-5p directly bound to the 3'-untranslated region of DDX59 and decreased the protein level of DDX59. The decrease of DDX59 was found to lead to the decrease of p-AKT. Mechanistic studies revealed that restoring the expression of DDX59 alleviated miR-628-5p-induced inhibition of proliferation of glioma. These findings suggest that the miR-628-5p/DDX59 axis has a key role in the development of glioma, and miR-628-5p might be a new therapeutic target against glioma.

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