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Downregulation of the long noncoding RNA GAS5-AS1 contributes to tumor metastasis in non-small cell lung cancer
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Downregulation of the long noncoding RNA GAS5-AS1 contributes to tumor metastasis in non-small cell lung cancer
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Journal Article
Downregulation of the long noncoding RNA GAS5-AS1 contributes to tumor metastasis in non-small cell lung cancer
2016
Overview
Long noncoding RNA (lncRNA) plays pivotal roles in cancer development. To date, only a small number of lncRNAs have been characterized at functional level. Here, we discovered a novel lncRNA termed GAS5-AS1 as a tumor suppressor in non-small cell lung cancer (NSCLC). The expression of GAS5-AS1 in NSCLC tumors was much lower than that in the adjacent normal lung tissues. The reduced GAS5-AS1 was significantly correlated with larger tumors, higher TNM stages and lymph node metastasis in NSCLC patients. While ectopic expression or specific knockdown of GAS5-AS1 had no effect on proliferation, cell cycle progression and apoptosis, it dramatically decreased or increased, respectively, NSCLC cell migration and invasion. Overexpression of GAS5-AS1 in NSCLC cells reduced a cohort of molecules (ZEB1, N-cadherin, Vimentin, and/or Snail1) critical for epithelial-mesenchymal transition (EMT). Furthermore, the DNA demethylating agent 5-aza-2-deoxycytidine failed to upregulate GAS5-AS1 in NSCLC cells, whereas the pan-HDAC inhibitors panobinostat and SAHA significantly induced GAS5-AS1 in a dose-dependent manner. In addition, GAS5-AS1 can be upregulated by specific knockdown of HDAC1 or HDAC3. Collectively, our data suggest that histone modifications play a major role leading to epigenetic silencing of
GAS5-AS1
in NSCLC and subsequently promote tumor metastasis via upregulation of several key EMT markers.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 13/106
/ 13/109
/ 13/44
/ 38
/ 38/22
/ 38/77
/ 38/79
/ 96
/ 96/31
/ Aged
/ Carcinoma, Non-Small-Cell Lung - genetics
/ Carcinoma, Non-Small-Cell Lung - metabolism
/ Carcinoma, Non-Small-Cell Lung - secondary
/ DNA
/ Epithelial-Mesenchymal Transition - genetics
/ Female
/ Histone Deacetylase Inhibitors - pharmacology
/ Humanities and Social Sciences
/ Humans
/ Lymph
/ Male
/ Neoplasm Invasiveness - genetics
/ Neoplasm Metastasis - genetics
/ Non-small cell lung carcinoma
/ RNA
/ RNA, Long Noncoding - genetics
/ RNA, Long Noncoding - metabolism
/ Science
/ Tumors
/ Vimentin
