Potential conflict of interest: Nothing to report.
Long noncoding RNA HOTTIP/HOXA13 expression is associated with disease progression and predicts outcome in hepatocellular carcinoma patients
Article first published online: 28 JAN 2014
© 2014 by the American Association for the Study of Liver Diseases
Volume 59, Issue 3, pages 911–923, March 2014
How to Cite
Quagliata, L., Matter, M. S., Piscuoglio, S., Arabi, L., Ruiz, C., Procino, A., Kovac, M., Moretti, F., Makowska, Z., Boldanova, T., Andersen, J. B., Hämmerle, M., Tornillo, L., Heim, M. H., Diederichs, S., Cillo, C. and Terracciano, L. M. (2014), Long noncoding RNA HOTTIP/HOXA13 expression is associated with disease progression and predicts outcome in hepatocellular carcinoma patients. Hepatology, 59: 911–923. doi: 10.1002/hep.26740
Supported by Swiss Cancer League (Oncosuisse) grant KLS-2867-08-2011 to L.M.T.; M.S.M. is supported by Schweizerische Stifung für Medizinisch-Biologische Stipendien (PASMP-3_140071); HCC research in the lab of S.D. is supported by the German Research Foundation (DFG TRR77 TP B03).
- Issue published online: 25 FEB 2014
- Article first published online: 28 JAN 2014
- Accepted manuscript online: 20 SEP 2013 03:30AM EST
- Manuscript Accepted: 8 SEP 2013
- Manuscript Received: 9 APR 2013
Hepatocellular carcinoma (HCC) is among the leading causes of cancer-related death. Despite the advances in diagnosis and management of HCC, the biology of this tumor remains poorly understood. Recent evidence highlighted long noncoding RNAs (lncRNAs) as crucial determinants of HCC development. In this study we report the lncRNA HOXA transcript at the distal tip (HOTTIP) as significantly up-regulated in HCC specimens. The HOTTIP gene is located in physical contiguity with HOXA13 and directly controls the HOXA locus gene expression by way of interaction with the WDR5/MLL complex. HOX genes encode transcription factors regulating embryonic development and cell fate. We previously described HOX genes deregulation to be involved in hepatocarcinogenesis. Indeed, we observed the marked up-regulation of HOXA13 in HCC. Here, by correlating clinicopathological and expression data, we demonstrate that the levels of HOTTIP and HOXA13 are associated with HCC patients' clinical progression and predict disease outcome. In contrast to the majority of similar studies, our data were obtained from snap-frozen needle HCC biopsies (n = 52) matched with their nonneoplastic counterparts collected from patients who had not yet received any HCC-tailored therapeutic treatments at the time of biopsy. In addition, taking advantage of gain and loss of function experiments in liver cancer-derived cell lines (HuH-6 and HuH-7), we uncover a novel bidirectional regulatory loop between HOTTIP/HOXA13. Conclusion: Our study highlights the key role of HOTTIP and HOXA13 in HCC development by associating their expression with metastasis and survival in HCC patients, provides novel insights on the function of lncRNA-driven hepatocarcinogenesis, and paves the way for further investigation about the possible role of HOTTIP as a predictive biomarker of HCC. (Hepatology 2014;59:911–923)