MiR-126 Regulates the ERK Pathway Via Targeting KRAS to Inhibit the Glioma Cell Proliferation and Invasion

Overview

Journal Mol Neurobiol

Specialties Molecular Biology
Neurology

Date 2016 Jan 7

PMID 26732596

Citations 27

Authors

Yang Li

Yunqian Li

Pengfei Ge

Chengyuan Ma

Affiliations

Soon will be listed here.

Abstract

The activity of some constitutive contained in the extracellular signal-regulated kinase (ERK) pathway plays crucial roles in glioma cell growth and proliferation. Emerging studies have reported that microRNA (miRNA) could regulate the ERK signal pathway by directly targeting various oncogenes. This study enabled us to discover that the average miR-126 expression was significantly decreased in glioblastoma tissues, and this significant decrease was related to high histopathological grades. Our experiment also demonstrated that the over-expression of miR-126 suppressed glioma cell proliferation and invasion in vitro. Kirsten rat sarcoma viral oncogene (KRAS) which is involved in ERK pathway was directly targeted by miR-126 in glioma through binding to two sites in the 3' untranslated region (3'-UTR) of KRAS mRNA. Notably, the expression level of KRAS was positively correlated to the activity of ERK pathway and its downstream regulators (phosphorylation level of ERK (pERK) and c-Fos). Furthermore, the over-expression of KRAS expression vector without the 3'-UTR partially reverses the tumor-suppressive effects of miR-126. Moreover, the up-regulation of miR-126 contributes to the aberrant activation of the ERK signaling and inhibits cell proliferation and invasion through targeting KRAS. Therefore, it was suspected that miR-126 may be a potential therapeutic target for high-grade glioma.

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