MiR-203 sensitizes glioma cells to temozolomide and inhibits glioma cell invasion by targeting E2F3.

Abstract:

:Glioma is the most common malignant and fatal primary tumor in the central nervous system in adults. Recent data has suggested a profound role for microRNAs (miRs) in cancer progression. The present study demonstrated, via quantitative polymerase chain reaction (qPCR) analysis, that miR-203 expression was markedly lower in highly invasive U87MG glioma cells and glioma tissues. Wound healing and Transwell assays demonstrated that restoration of miR-203 expression inhibited U87MG cell migration and invasion. Restoration of miR-203 expression additionally sensitized the cells to temozolomide (TMZ) as determined by MTS assay. By contrast, miR-203 inhibition in A172 cells exerted opposite effects. Bioinformatic analysis combined with experimental analysis revealed that miR-203 directly targeted E2F3 via the conserved miR-203 target site within the E2F3 3'-untranslational region. E2F3 knockdown with specific small hairpin RNA also inhibited U87MG cell migration and invasion, and sensitized them to TMZ. Importantly, miR-203 and E2F3 showed inverse expression patterns in invasive glioma tissues, as demonstrated by qPCR and luciferase assay. These results suggested that miR-203 may function as a tumor suppressor in glioma progression and that the miR-203/E2F3 axis may be a novel candidate in the development of rational therapeutic strategies for glioma.

journal_name

Mol Med Rep

authors

Tang G,Wu J,Xiao G,Huo L

doi

10.3892/mmr.2014.3101

subject

Has Abstract

pub_date

2015-04-01 00:00:00

pages

2838-44

issue

4

eissn

1791-2997

issn

1791-3004

journal_volume

11

pub_type

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