MiR-124 Suppresses Multiple Steps of Breast Cancer Metastasis by Targeting a Cohort of Pro-metastatic Genes in Vitro

Overview

Journal Chin J Cancer

Publisher Biomed Central

Specialty Oncology

Date 2011 Nov 17

PMID 22085528

Citations 38

Authors

Xiao-Bin Lv

Yu Jiao

Yanwei Qing

Haiyan Hu

Xiuying Cui

Tianxin Lin

Erwei Song

Fengyan Yu

Affiliations

Soon will be listed here.

Abstract

Metastasis is a multistep process involving modification of morphology to suit migration, reduction of tumor cell adhesion to the extracellular matrix, increase of cell mobility, tumor cell resistance to anoikis, and other steps. MicroRNAs are well-suited to regulate tumor metastasis due to their capacity to repress numerous target genes in a coordinated manner, thereby enabling their intervention at multiple steps of the invasion-metastasis cascade. In this study, we identified a microRNA exemplifying these attributes, miR-124, whose expression was reduced in aggressive MDA-MB-231 and SK-3rd breast cancer cells. Down-regulation of miR-124 expression in highly aggressive breast cancer cells contributed in part to DNA hypermethylation around the promoters of the three genes encoding miR-124. Ectopic expression of miR-124 in MDA-MB-231 cells suppressed metastasis-related traits including formation of spindle-like morphology, migratory capacity, adhesion to fibronectin, and anoikis. These findings indicate that miR-124 suppresses multiple steps of metastasis by diverse mechanisms in breast cancer cells and suggest a potential application of miR-124 in breast cancer treatment.

Citing Articles

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