miR-185 suppresses tumor proliferation by directly targeting E2F6 and DNMT1 and indirectly upregulating BRCA1 in triple-negative breast cancer.

Abstract:

:Breast cancer is a major public health problem all over the world, and the current treatment strategies are not potent enough for some patients, especially those with triple-negative breast cancer (TNBC). Recent studies have demonstrated that microRNAs (miRNA) play vital roles in the development of TNBC. In this study, we found that miR-185 was strongly downregulated in TNBC tissues and cell lines and that its expression levels were associated with lymph node metastasis, clinical stage, overall survival, and relapse-free survival in TNBC. We also found that ectopic expression of miR-185 inhibited TNBC cell proliferation in vitro and in vivo. We further identified that miR-185 directly targeted DNMT1 and E2F6, which resulted in a marked increase in the expression of BRCA1 at the mRNA and protein levels in TNBC. Our data suggest that miR-185 functions as a tumor suppressor in TNBC development. It is a promising prognostic biomarker and potential therapeutic target for TNBC.

journal_name

Mol Cancer Ther

authors

Tang H,Liu P,Yang L,Xie X,Ye F,Wu M,Liu X,Chen B,Zhang L,Xie X

doi

10.1158/1535-7163.MCT-14-0243

subject

Has Abstract

pub_date

2014-12-01 00:00:00

pages

3185-97

issue

12

eissn

1535-7163

issn

1538-8514

pii

1535-7163.MCT-14-0243

journal_volume

13

pub_type

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