DNA and RNA oxidative damage in hepatocellular carcinoma patients and mortality during the first year of liver transplantation

BACKGROUND Oxidative damage of DNA and RNA has been associated with mortality of patients with different diseases. However, there is no published data on the potential use of DNA and RNA oxidative damage to predict the prognosis of patients with hepatocellular carcinoma (HCC) undergoing liver transplantation (LT). AIM To determine whether patients with increased DNA and RNA oxidative damage prior to LT for HCC have a poor LT prognosis. METHODS Patients with HCC who underwent LT were included in this observational and retrospective study. Serum levels of all three oxidized guanine species (OGS) were measured prior to LT since guanine is the nucleobase that forms DNA and RNA most prone to oxidation. LT mortality at 1 year was the end-point study. RESULTS Surviving patients (n = 101) showed lower serum OGS levels (P = 0.01) and lower age of the liver donor (P = 0.03) than non-surviving patients (n = 13). An association between serum OGS levels prior to LT and 1-year LT (odds ratio = 2.079; 95% confidence interval = 1.356-3.189; P = 0.001) was found in the logistic regression analysis. CONCLUSION The main new finding was that high serum OGS concentration prior to LT was associated with the mortality 1 year after LT in HCC patients.