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Published in: Journal of Hematology & Oncology 1/2015

Open Access 01-12-2015 | Research article

Long non-coding RNA ANRIL is upregulated in hepatocellular carcinoma and regulates cell apoptosis by epigenetic silencing of KLF2

Authors: Ming-de Huang, Wen-ming Chen, Fu-zhen Qi, Rui Xia, Ming Sun, Tong-peng Xu, Li Yin, Er-bao Zhang, Wei De, Yong-qian Shu

Published in: Journal of Hematology & Oncology | Issue 1/2015

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Abstract

Background

Hepatocellular carcinoma (HCC) is one of the leading causes of cancer-related death, especially in China. And the mechanism of its progression remains poorly understood. Growing evidence indicates that long non-coding RNAs (lncRNAs) are found to be dysregulated in many cancers, including HCC. ANRIL, a lncRNA co-clustered mainly with p14/ARF has been reported to be dysregulated in gastric cancer, esophageal squamous cell carcinoma, and lung cancer. However, its clinical significance and potential role in HCC are still not documented.

Methods and results

In this study, expression of ANRIL was analyzed in 77 HCC tissues and matched normal tissues by using quantitative polymerase chain reaction (qRT-PCR). ANRIL expression was upregulated in HCC tissues, and the higher expression of ANRIL was significantly correlated with tumor size and Barcelona Clinic Liver Cancer (BCLC) stage. Moreover, taking advantage of loss-of-function experiments in HCC cells, we found that knockdown of ANRIL expression could impair cell proliferation and invasion and induce cell apoptosis both in vitro and in vivo. We also found that ANRIL could epigenetically repress Kruppel-like factor 2 (KLF2) transcription in HCC cells by binding with PRC2 and recruiting it to the KLF2 promoter region. We also found that SP1 could regulate the expression of ANRIL.

Conclusion

Our results suggest that lncRNA ANRIL, as a growth regulator, may serve as a new biomarker and target for therapy in HCC.
Appendix
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Metadata
Title
Long non-coding RNA ANRIL is upregulated in hepatocellular carcinoma and regulates cell apoptosis by epigenetic silencing of KLF2
Authors
Ming-de Huang
Wen-ming Chen
Fu-zhen Qi
Rui Xia
Ming Sun
Tong-peng Xu
Li Yin
Er-bao Zhang
Wei De
Yong-qian Shu
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Journal of Hematology & Oncology / Issue 1/2015
Electronic ISSN: 1756-8722
DOI
https://doi.org/10.1186/s13045-015-0146-0

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