LncRNA TTN‐AS1 drives invasion and migration of lung adenocarcinoma cells via modulation of miR‐4677‐3p/ZEB1 axis

2019 ◽  
Vol 120 (10) ◽  
pp. 17131-17141 ◽  
Author(s):  
Yuanbo Zhong ◽  
Jin Wang ◽  
Wen Lv ◽  
Jianzhong Xu ◽  
Shanshan Mei ◽  
...  
2017 ◽  
Vol 42 (5) ◽  
pp. 1779-1788 ◽  
Author(s):  
Jinchang Lu ◽  
Chunling Du ◽  
Junxia Yao ◽  
Bo Wu ◽  
Yanhong Duan ◽  
...  

Background/Aims: The transcription factor CCAAT/enhancer-binding protein α (C/EBPα) is a basic leucine zipper transcription factor that plays essential roles in tumor progression. Although decreased or absent C/EBPα expression in many cancers suggests a possible role for C/EBPα as a tumor suppressor, the functions of C/EBPα in lung adenocarcinoma remain unclear. Methods: Here, C/EBPα expression levels in 26 lung adenocarcinoma and para-carcinoma tissue samples were detected by qRT-PCR and immunohistochemistry. Cell transwell assays, wound healing assay and three-dimensional spheroid invasion assay were performed to assess the effects of C/EBPα on migration and invasion in lung adenocarcinoma cells in vitro. Western blotting was applied to analyze the potential mechanisms. Results: C/EBPα was found to be decreased in lung adenocarcinoma tissues compared to para-carcinoma tissues. Overexpression of C/EBPα significantly inhibited the migration and invasion of lung adenocarcinoma cells. In addition, C/EBPα overexpression suppressed the epithelial–mesenchymal transition (EMT) that was characterized by a gain of epithelial and loss of mesenchymal markers. Further study showed that C/EBPα suppressed the transcription of β-catenin and downregulated the levels of its downstream targets. Conclusion: Our data suggest that C/EBPα inhibits lung adenocarcinoma cell invasion and migration by suppressing β-catenin-mediated EMT in vitro. Thus, C/EBPα may be helpful as a potential target for treatment of lung adenocarcinoma.


2013 ◽  
Vol 43 (5) ◽  
pp. 1569-1577 ◽  
Author(s):  
HIROTSUGU NOTSUDA ◽  
AKIRA SAKURADA ◽  
CHIAKI ENDO ◽  
YOSHINORI OKADA ◽  
AKIRA HORII ◽  
...  

2016 ◽  
Vol 35 (5) ◽  
pp. 2755-2766 ◽  
Author(s):  
MEI SUN ◽  
SHUNMING HONG ◽  
WENHAN LI ◽  
PENGFEI WANG ◽  
JINQIANG YOU ◽  
...  

2018 ◽  
Vol 39 (1) ◽  
pp. 215-223 ◽  
Author(s):  
CHIN-NAN CHU ◽  
KING-CHUEN WU ◽  
WAI-SHAN CHUNG ◽  
LI-CHENG ZHENG ◽  
TA-KUO JUAN ◽  
...  

2021 ◽  
Vol 104 (2) ◽  
pp. 003685042110093
Author(s):  
Mingxin Liu ◽  
Hong Wu ◽  
Yiqiang Liu ◽  
Yan Tan ◽  
Songtao Wang ◽  
...  

MiR-326 functions as an antioncogene in the several types of cancer. However, the underling mechanisms through which miRNA-326 regulates the anti-carcinogenesis of lung adenocarcinoma have remained elusive. The aim of this study was to explore the role and regulatory mechanism of miR-326 in cell proliferation, invasion, migration and apoptosis in lung adenocarcinoma. Quantitative real-time PCR (qRT-PCR) was used to detect the expression pattern of miR-326 in human bronchial epithelial cells (HBES-2B), 4 kinds of lung adenocarcinoma cell lines (H23, H1975, H2228, H2085) and 20 lung adenocarcinoma tissues. Then, H23 cells were infected with miR-326 mimics, miR-326 inhibitors and si-ZEB1 to build up-regulated miR-326 cell lines, down-regulated ZEB1(zinc-finger-enhancer binding protein 1)cell lines, simultaneous down-regulated ZEB1 and miR-326 cell lines. Moreover, CCK-8 assay, transwell invasion assay, wound healing assay and flow cytometry assay were employed to examine the effects of miR-326 and ZEB1 on the proliferation, invasion, migration and apoptosis abilities of H23 cells. Western blot was performed to explore the effects of miR-326 and ZEB1 on the expression of invasion and migration related proteins N-cadherin, E-cadherin, MMP7, MMP13, SLUG and apoptotic proteins PARP, BAX. On the mechanism, a dual-luciferase reporter gene was used to measure the target relationship between miR-326 and ZEB1. MiR-326 expression was significantly downregulated in lung adenocarcinoma tissues and cells. Overexpression of miR-326 significantly inhibited the malignant behaviors of H23 cells. Mechanically, luciferase reporter assay showed that ZEB1 was a direct target of miR-326. MiR-326 mimic downregulated the expression of ZEB1. Furthermore, knocking down ZEB1 strongly inhibited the proliferation, invasion and migration of H23 cells but promoted apoptosis. MiR-326 could target ZEB1 to inhibit the proliferation, invasion and migration of lung adenocarcinoma cells and promote apoptosis, which is a potential therapeutic target for lung adenocarcinoma.


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