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MiR-654-5p attenuates breast cancer progression by targeting EPSTI1 #MMPMID27186421
Tan YY; Xu XY; Wang JF; Zhang CW; Zhang SC
Am J Cancer Res 2016[]; 6 (2): 522-32 PMID27186421show ga
MicroRNAs (miRNAs) dysregulation is a common event in a variety of human diseases including breast cancer. However, clinical relevance and biological role of miR-654-5p in the progression of breast cancer remain greatly elusive. Herein, the expression levels of miR-654-5p were aberrantly downregulated in human breast cancer specimens and four breast cancer cell lines. Low expression of miR-654-5p was strongly associated with advanced TNM stage and lymph node metastasis as well as a poor survival. Functional analysis showed that miR-654-5p overexpression inhibited cell growth and invasion, and induced cell apoptosis in two aggressive breast cancer cells. Further studies demonstrated that Epithelial stromal interaction 1 (EPSTI1) was a direct target gene of miR-654-5p and showed an inverse correlation with miR-654-5p expression. Forced expression of EPSTI1 could abrogate the inhibitory effect of miR-654-5p on the growth and invasion of breast cancer cells as well as apoptosis-induced ability. In conclusion, the present study highlights that miR-654-5p acts as a tumor suppressor in breast cancer through directly targeting EPSTI1, and their functional regulation may open a novel avenue with regard to the therapeutic target for breast cancer.
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Am+J+Cancer+Res 2016 ; 6 (2): 522-32
