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Tumor Biology
Published in: Tumor Biology 7/2016

01-07-2016 | Original Article

Expression and mechanisms of long non-coding RNA genes MEG3 and ANRIL in gallbladder cancer

Authors: Bo Liu, Er-Dong Shen, Ming-Mei Liao, Yong-Bin Hu, Kai Wu, Pu Yang, Lin Zhou, Wei-Dong Chen

Published in: Tumor Biology | Issue 7/2016

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Abstract

The objective of this study was to investigate the expression, proliferation, and apoptosis function of long-chain non-coding RNA maternally expressed gene 3 (MEG3) and antisense non-coding RNA at the INK4 locus (ANRIL) in gallbladder cancer (GBC) tissues. GBC tissues and adjacent normal samples were collected from 84 patients from January 2008 to June 2010. Empty vector, pcDNA-MEG3, and pcDNA-ANRIL vectors were transfected into GBC-SD and QBC939 cells. An MTT assay, real-time quantitative polymerase chain reaction (RT-qPCR), flow cytometry, Western blotting, and immunohistochemistry were applied. The effects of MEG3 and ANRIL were also verified in mice. Compared with normal tissues, the expression of MEG3 was significantly lower in GBC tissues, whereas the expression of ANRIL was significantly higher (both P < 0.05). The overexpression of MEG3 and underexpression of ANRIL were significantly associated with GBC prognosis (both P < 0.05). The expressions of MEG3 and ANRIL were higher in pcDNA-MEG3 and pcDNA-ANRIL-transfected cells than in empty vector-transfected cells in vitro (both P < 0.05). Most of the pcDNA-MEG3-transfected cells were in the G0-G1 phase, which showed reduced cell activity and clone counts and increased p53 and decreased cyclin D1, whereas the pcDNA-ANRIL-transfected cells were mostly in the S phase and showed contrasting behavior. Mice injected with pcDNA-MEG3-transfected cells had smaller and lighter tumors, decreased ki-67 levels, and increased caspase 3 levels, whereas those injected with pcDNA-ANRIL showed contrasting results (all P < 0.05). MEG3 can inhibit the proliferation of GBC cells and promote apoptosis, whereas ANRIL can improve the proliferation of gallbladder cells and inhibit apoptosis. Collectively, our results suggest that therapeutic strategies directed toward upregulating MEG3 and downregulating ANRIL may be clinically relevant for the inhibition of GBC deterioration.
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Metadata
Title
Expression and mechanisms of long non-coding RNA genes MEG3 and ANRIL in gallbladder cancer
Authors
Bo Liu
Er-Dong Shen
Ming-Mei Liao
Yong-Bin Hu
Kai Wu
Pu Yang
Lin Zhou
Wei-Dong Chen
Publication date
01-07-2016
Publisher
Springer Netherlands
Published in
Tumor Biology / Issue 7/2016
Print ISSN: 1010-4283
Electronic ISSN: 1423-0380
DOI
https://doi.org/10.1007/s13277-016-4863-y

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