Journal
JOURNAL OF CELLULAR BIOCHEMISTRY
Volume 119, Issue 6, Pages 4458-4468Publisher
WILEY
DOI: 10.1002/jcb.26540
Keywords
hepatocellular carcinoma; long non-coding RNA; MAPK1; miR-194-5p
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Funding
- Science and Technology Planning Project of Guangdong Province [2015A020212017]
- Science and Technology Program of Guangdong Province [2014A020212155]
- National Natural Science Foundation of China [81101096]
- Natural Science Foundation of Guangdong Province [2015A030313044, 2016A030313323]
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Increasing evidence highlights the important role of XIST, a long non-coding RNA (lncRNA), in the regulation of multiple cancers. However, the underlying mechanism of XIST in human hepatocellular carcinoma (HCC) still remains to be explored. Herein, intended to investigate the functional role of XIST in HCC initiation and progression. We first detected that XIST was significantly upregulated in HCC tissues and associated with tumor size and vascular invasion. Gain- and loss-of-function of XIST further presented that XIST promoted the progression of HCC cells, including proliferation, migration, and invasion. Moreover, silencing of XIST could inhibit tumor growth in vivo. We also found that XIST could target miR-194-5p and thus decrease miR-194-5p expression. Besides that, restoring XIST could reverse the inhibitory effect of miR-194-5p on the proliferation and invasion of HCC cells. We further elucidated such rescue role might through derepressing MAPK1 expression, the target of miR-194-5p. In brief, the above results elucidate the important role of XIST in HCC tumorigenesis, suggesting that XIST might be a candidate prognostic biomarker and a novel therapeutic target for treating HCC.
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