Background & Aims: Differentiation antagonizing non-protein coding RNA is associated with various types of neoplasms. Hepatitis C virus-related hepatocellular carcinoma has a high risk of recurrence. Here we determined the role of differentiation antagonizing non-protein coding RNA in hepatitis C virus-related hepatocarcinogenesis and identified potential therapeutic targets and non-invasive prognostic markers for long-term outcome of hepatitis C virus-related hepatocellular carcinoma after surgical resection.
Methods: Differentiation antagonizing non-protein coding RNAs relevant to hepatitis C virus-related hepatocellular carcinoma were identified through comparative RNA-sequencing of tumour and adjacent non-tumour (ANT) tissues in a screening set, and were validated using real-time polymerase chain reaction. Target long non-coding RNAs (lncRNAs) in tissues and serum exosomes were used to predict the recurrence of hepatitis C virus-related hepatocellular carcinoma after curative surgical resection in a large application cohort from 2005 to 2012.
Results: We confirmed that differentiation antagonizing non-protein coding RNA was upregulated following hepatitis C virus infection and identified as the lncRNA most relevant to hepatitis C virus-related hepatocellular carcinoma in tumour tissues as compared to that in ANT tissues. In 183 hepatitis C virus-related hepatocellular carcinoma patients followed for 10 years after curative HCC resection, the expression level of circulating exosomal differentiation antagonizing non-protein coding RNA was positively associated with HCC recurrence and was the most predictive factor associated with HCC recurrence and mortality (hazard ratio/95% confidence intervals: 7.0/4.3-11.6 and 2.7/1.5-5.1 respectively).
Conclusions: Differentiation antagonizing non-protein coding RNA is highly relevant to disease progression of hepatitis C virus-related hepatocellular carcinoma. Our finding indicated that circulating exosomal differentiation antagonizing non-protein coding RNA might serve as a non-invasive prognostic biomarker for hepatitis C virus-related hepatocellular carcinoma.
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