Downregulation of microRNA-216b contributes to glioma cell growth and migration by promoting AEG-1-mediated signaling - 11/06/18
, Ning Wang, Jia Wang, Lei Qi, Ping MaoBienvenue sur EM-consulte, la référence des professionnels de santé.
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Graphical abstract |
Highlights |
• | miR-216b is decreased in glioma tissues and cell lines. |
• | miR-216b inhibits glioma cell proliferation and migration. |
• | miR-216b targets AEG-1 3′-UTR and inhibits AEG-1 expression. |
• | miR-216b exerts antitumor function by targeting AEG-1. |
Abstract |
Accumulating evidence indicates microRNA-216b (miR-216b) plays an important role in the development and progression of various cancers. However, little is known about the function of miR-216b in gliomas. In this study, we aimed to investigate the expression level and functional significance of miR-216b in gliomas. We found that miR-216b was significantly downregulated in glioma specimens and cell lines. Overexpression of miR-216b suppressed the growth and migration of glioma cells, while miR-216b inhibition showed the opposite effects. Astrocyte elevated gene-1 (AEG-1) was predicted as a potential target gene of miR-216b by bioinformatics analysis. A dual-luciferase reporter assay showed that miR-216b could directly target the 3′-untranslated region of AEG-1. RT-qPCR and western blot analysis showed that miR-216 negatively regulated AEG-1 expression in glioma cells. Correlation analysis revealed an inverse correlation between miR-216b and AEG-1 in clinical glioma specimens. miR-216b also regulated the activation of nuclear factor-κB and Wnt signaling in glioma cells. Moreover, restoration of AEG-1 expression partially reversed the inhibitory effect of miR-216b overexpression on glioma cell growth and migration. Overall, these results revealed a tumor suppressive role of miR-216b in glioma tumorigenesis, and identified AEG-1 as a target gene of miR-216b action. Our study suggests that miR-216b can be potentially targeted for the development of novel therapies for gliomas.
Le texte complet de cet article est disponible en PDF.Abbreviations : AEG-1, miRNAs, miR-216b, NF-κB, 3′-UTR, HIV, CCK-8, RT-qPCR, FBS
Keywords : AEG-1, Glioma, miR-216b, NF-κB, Wnt
Plan
Vol 104
P. 420-426 - août 2018 Retour au numéro
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