Abstract
Esophageal cancer is characterized by increased oxidative stress and the production of 8-hydroxy-2'-deoxyguanosine (8-OHdG), which is one of the main mutagenic modifications of DNA. We analyzed the predictive value of 8-OHdG expression on postoperative survival of patients with esophageal cancer with univariate and multivariate analysis. The high levels of 8-OHdG are associated with significantly shorter survival time by log-rank test using Kaplan-Meier methods. Moreover, the level of 8-OHdG expression was identified as an independent predictor for esophageal cancer outcome using Cox proportional hazards model analysis (relative risk, 0.294; 95% confidence interval, 0.178-0.487; P = .000). These results suggest that oxidative damage marker of 8-OHdG is a useful prognostic marker in esophageal cancer. The analysis of 8-OHdG levels can help in the identification of patient subgroups that are at high risk for poor disease outcomes.
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