MicroRNA-302a targets GAB2 to suppress cell proliferation, migration and invasion of glioma.

Abstract:

:Glioma is the most frequent and aggressive primary tumor of the brain in humans. Over the last few decades, significant progress has been made in early detection and multi-mode treatments, but the prognosis of gliomas is still extremely poor. MicroRNAs are endogenously expressed non-coding, single strand and short RNA molecules. Increasing number of studies demonstrated that microRNAs are dysregulated in a variety of human cancers, and play significant roles in tumorigenesis and tumor development, including glioma. In the present study, we for the first time found that microRNA-302a (miR-302a) was significantly downregulated in both glioma tissues and cell lines. In glioma patients, low miR-302a expression was correlated with KPS score and WHO grade. Restoration of miR-302a expression inhibited cell proliferation, migration and invasion of glioma in vitro. In addition, GAB2 was identified as a direct target of miR-320a. In clinical glioma tissues, GAB2 was upregulated and in-versely correlated with miR-302a expression. GAB2 underexpression had similar biological roles with miR-302a overexpression in glio-ma cells, further confirming that GAB2 was a functional downstream target of miR-302a. Moreover, rescue experiments showed that upregulation of GAB2 effectively reversed the inhibition effects of miR-302a on glioma cells proliferation, migration and invasion. These findings suggested that miR-302a is an important tumor suppressor of glioma progression by directly targeting GAB2, thus providing new insight into the molecular mechanisms underlying glioma occurrence, development and evolution of glioma.

journal_name

Oncol Rep

journal_title

Oncology reports

authors

Ma J,Yu J,Liu J,Yang X,Lou M,Liu J,Feng F,Ji P,Wang L

doi

10.3892/or.2016.5320

subject

Has Abstract

pub_date

2017-02-01 00:00:00

pages

1159-1167

issue

2

eissn

1021-335X

issn

1791-2431

journal_volume

37

pub_type

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