microRNA-762 promotes breast cancer cell proliferation and invasion by targeting IRF7 expression.

Abstract:

OBJECTIVES:miRNAs play crucial roles in human tumourigenesis. This study was performed to measure expression and function of miR-762 in breast cancer. MATERIALS AND METHODS:Expression of miR-762 in breast tissues and cell lines (SK-BR-3, DA-MB-435s, MCF-7 and MDA-MB-231, HBL-100) was measured by using real-time RT-PCR. We restored expression of miR-762 in MCF-7 cells to measure its functional roles. Luciferase assays were performed to reveal the target gene of miR-762. RESULTS:Expression of miR-762 was high in both breast cancer cell lines and specimens, and its overexpression increased breast cancer cell proliferation and invasion. Interferon regulatory factor 7 (IRF7) is a direct target of miR-762 and overexpression of miR-762 reduced expression of IRF7. Moreover, IRF7 was repressed, its levels inversely correlated to miR-762 expression. IRF7 rescued miR-762-induced cell invasion and proliferation. CONCLUSIONS:These results demonstrate that miR-762 tumour effect was achieved by targeting IRF7 in human breast cancer specimens.

journal_name

Cell Prolif

journal_title

Cell proliferation

authors

Li Y,Huang R,Wang L,Hao J,Zhang Q,Ling R,Yun J

doi

10.1111/cpr.12223

subject

Has Abstract

pub_date

2015-12-01 00:00:00

pages

643-9

issue

6

eissn

0960-7722

issn

1365-2184

journal_volume

48

pub_type

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