MiR-674-5p Suppresses the Proliferation and Migration of Glioma Cells by Targeting Cul4b.

Glioma multiforme (GBM) is the most common malignant primary brain tumors. Despite the considerable advances in GBM treatment, it is still one of the most lethal forms of brain tumor. New clinical biomarkers and therapeutic targets are immediately required. MicroRNAs (miRNAs) are a class of small, evolutionarily conserved noncoding RNAs and have emerged as the key regulators of many cancers. Here in this study, we showed that miR-674-5p was probably an important regulator of glioma cell growth. After the transfection with miR-674-5p mimic or inhibitor, we found that the expression level of miR-674-5p was negatively related with cell proliferation and migration in C6 cells. Based on the prediction of the target genes of miR-674-5p on the website, we chose Cullin 4B (Cul4b), a gene upregulated in GBM, and proved that it was a target of miR-674-5p. In addition, we explored the role of miR-674-5p in glioma growth in vivo. Taken together, the present study indicated that miR-674-5p suppressed glioma cell proliferation and migration by targeting Cul4b.