A tumor-suppressive microRNA, miRNA-485-5p, inhibits glioma cell proliferation and invasion by down-regulating TPD52L2

Glioblastoma multiforme is the most deadly primary brain tumor and has no effective treatment. Therefore, it is important to identify novel and effective therapies that impede glioma tumorigenesis. MicroRNAs (miRNAs) are helpful analytical biomarkers and may be useful targets for treating multiple human cancers. Previous reports suggest that miRNA-485-5p is dysregulated and contributes to tumorigenesis in some cancer types. Nevertheless, the biological role of miRNA-485-5p in glioma is not well understood. In this study, we demonstrated that miRNA-485-5p expression was reduced in gliomat issues and cell lines. In addition, miRNA-485-5p overexpression inhibited cell proliferation, migration, and invasion in glioma cell lines. Additionally, we identified Tumor Protein D52 Like 2 (TPD52L2) as a direct target of miRNA-485-5p. Moreover, we showed that miRNA-485-5p regulated glioma tumorigenesis by down-regulating TPD52L2 expression in vitro and in vivo. Our results suggest that miRNA-485-5p is a suppressor of glioma tumorigenesis and could serve as a novel candidate for therapeutic applications in glioma treatment.