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- Title
MiR-506 inhibits multiple targets in the epithelial-to-mesenchymal transition network and is associated with good prognosis in epithelial ovarian cancer.
- Authors
Sun, Yan; Hu, Limei; Zheng, Hong; Bagnoli, Marina; Guo, Yuhong; Rupaimoole, Rajesha; Rodriguez‐Aguayo, Cristian; Lopez‐Berestein, Gabriel; Ji, Ping; Chen, Kexin; Sood, Anil K; Mezzanzanica, Delia; Liu, Jinsong; Sun, Baocun; Zhang, Wei
- Abstract
Extensive investigations have shown that miRNAs are important regulators of epithelial-to-mesenchymal transition ( EMT), mainly targeting the transcriptional repressors of E-cadherin (E-cad). Less is known about the post-transcriptional regulation of vimentin or N-cadherin (N-cad) in EMT. Our previous study identified miR-506 as a key EMT inhibitor through directly targeting the E-cad transcriptional repressor SNAI2. In this study, we provide evidence that miR-506 simultaneously suppresses vimentin and N-cad. The knockdown of vimentin using siRNA reversed EMT, suppressed cell migration and invasion, and increased E-cad expression on the cell membrane in epithelial ovarian cancer ( EOC) cells. In a set of tissue microarrays that included 204 EOCs of all major subtypes (eg serous, endometrioid, clear cell, and mucinous), miR-506 was positively correlated with E-cad and negatively correlated with vimentin and N-cad in all subtypes of EOC. A high level of miR-506 was positively associated with early FIGO stage and longer survival in EOC. Introduction of miR-506, mediated by nanoparticle delivery, in EOC orthotopic mouse models resulted in decreased vimentin, N-cad, and SNAI2 expression and increased E-cad expression; it also suppressed the dissemination of EOC cells. Thus, miR-506 represents a new class of miRNA that regulates both E-cad and vimentin/N-cad in the suppression of EMT and metastasis. Copyright © 2014 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
- Publication
Journal of Pathology, 2015, Vol 235, Issue 1, p25
- ISSN
0022-3417
- Publication type
Article
- DOI
10.1002/path.4443