Epigenome-Wide DNA Methylation Association Analysis Identified Novel Loci in Peripheral Cells for Alcohol Consumption Among European American Male Veterans.

Alcoholism, Clinical and Experimental Research
Ke XuJoel Gelernter

Abstract

Hazardous alcohol consumption has significant adverse medical consequences. These effects may be mediated, in part, by alterations in DNA methylation. Thus, DNA methylation signatures in peripheral cells may provide biomarkers of the medical impact of alcohol use and the risk for future alcohol consumption. Using a high-density methylation array, we characterized epigenome-wide DNA methylation in saliva cells with respect to alcohol consumption in a large cohort of male European American veterans. In this study, DNA methylation of over 870,000 CpG DNA sites was profiled in 1,135 European American men. Alcohol consumption was assessed using the Alcohol Use Disorder Identification Test-Consumption (AUDIT-C). Linear regression was applied in an epigenome-wide association study (EWAS), adjusted for confounders. Gene set enrichment analysis was performed in the KEGG database with a correction for gene length. We found that a total of 70 CpG sites reached EWAS-corrected significance (p < 6E-08) with small effects on alcohol consumption for individual CpG sites, including 64 new CpG sites and 6 CpG sites that were previously reported as associated with alcohol use disorder, liver function, body mass index, and lipid metabolism. The mo...Continue Reading

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Jul 8, 2020·International Journal of Molecular Sciences·Chia-Chun TsengShun-Jen Chang
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