Abstract
Gout is a common inflammatory disease, and the prevalence of gout in men is significantly higher than in women. Catechol-O-methyltransferase (COMT) regulates dopamine activity and metabolism, thereby participating in the uric acid metabolism, which in turn affects the occurrence of gout. Our study aimed to investigate the association between COMT methylation and gout in men. This study involved 57 male gout patients and 103 age-matched healthy men. We used quantitative methylation-specific polymerase chain reaction (qMSP) to determine DNA methylation levels in the blood. The COMT methylation level was represented by the percentage of methylation reference (PMR). Our results showed that COMT methylation levels were significantly lower in gout patients than in the control group (median PMR 9.50 vs 31.34, p = 3E-5). The area under the curve (AUC) was 0.701 (95% CI 0.611-0.790, p = 2.7E-5) with a sensitivity of 68% and a specificity of 68.4%. Our study found that there was a significant correlation between COMT hypomethylation and the risk of gout in males, and this provides an epigenetic mechanism of COMT in gout. COMT hypomethylation might be used as a potential diagnostic biomarker for gout in the future.
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