期刊
LUNG CANCER
卷 97, 期 -, 页码 87-94出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.lungcan.2016.04.017
关键词
MiR-145; MiR-203; SMAD3; Epithelial-mesenchymal transition
资金
- National Natural Science Foundation of China [81372277, 81502498]
- Jiangsu Province's Key Provincial Talents Program [RC2011106]
- Science and Technology Committee of Jiangsu Province [BK20131159]
- Natural Science Research Foundation of the Jiangsu Higher Education Institutions of China [14KJB320012, 14KJB310017]
- 333 Project of Jiangsu Province Government
- Soochow Scholar Project of Soochow University
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Objectives: MicroRNAs (miRNAs) have been proved to play important role in development of various cancers, including non-small cell lung cancer (NSCLC). Our previous studies have shown that miR-203 and miR-145 are associated with cellular invasion in NSCLC and nasopharyngeal cancer, respectively. However, the mechanistic role of miR-203 and miR-145 in TGF-beta-induced epithelial-mesenchymal transition (EMT) has not yet been elucidated in human cancers, including NSCLC. Materials and methods: Real-time quantitative reverse transcriptase PCR (qRT-PCR), western blot analysis, luciferase reporter gene assays, small RNA interference and transwell migration and invasion assays were carried on human NSCLC cell lines A549 and 95C. Thirty-six paired NSCLC tissues and adjacent noncancerous lung tissues were collected. Results: Both miR-145 and miR-203 can directly target the 3'-untranslated region (3'-UTR) of SMAD3, and overexpression of the two miRNAs in NSCLC cells inhibited the expression of SMAD3 mRNA and protein, whereas inhibition of endogenous miR-145 or miR-203 caused an increased expression of SMAD3. Moreover, miR-145 and/or miR-203 repressed TGF-beta-induced EMT and attenuated cell migration and invasion in A549 and 95C cells. siRNA-mediated knockdown of SMAD3 copied the phenotype of miR-145 and miR-203 overexpression in A549 and 95C cells. Conclusion: MiR-145 and miR-203 inhibited TGF-beta-induced EMT and invasion through repression of SMAD3 in NSCLC cells. Our findings provided insights into the miRNA-based mechanism for controlling TGF-beta-induced EMT of NSCLC cells and a strategy for targeted therapy of NSCLC. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据