Abstract
The lack of reliable measures of alcohol intake is a major obstacle to the diagnosis and treatment of alcohol-related diseases. Epigenetic modifications such as DNA methylation may provide novel biomarkers of alcohol use. To examine this possibility, we performed an epigenome-wide association study of methylation of cytosine-phosphate-guanine dinucleotide (CpG) sites in relation to alcohol intake in 13 population-based cohorts (n total = 13 317; 54% women; mean age across cohorts 42-76 years) using whole blood (9643 European and 2423 African ancestries) or monocyte-derived DNA (588 European, 263 African and 400 Hispanic ancestry) samples. We performed meta-analysis and variable selection in whole-blood samples of people of European ancestry (n = 6926) and identified 144 CpGs that provided substantial discrimination (area under the curve = 0.90-0.99) for current heavy alcohol intake (≥42 g per day in men and ≥28 g per day in women) in four replication cohorts. The ancestry-stratified meta-analysis in whole blood identified 328 (9643 European ancestry samples) and 165 (2423 African ancestry samples) alcohol-related CpGs at Bonferroni-adjusted P<1×10 -7 . Analysis of the monocyte-derived DNA (n = 1251) identified 62 alcohol-related CpGs at P<1×10 -7 . In whole-blood samples of people of European ancestry, we detected differential methylation in two neurotransmitter receptor genes, the γ-Aminobutyric acid-A receptor delta and γ-aminobutyric acid B receptor subunit 1; their differential methylation was associated with expression levels of a number of genes involved in immune function. In conclusion, we have identified a robust alcohol-related DNA methylation signature and shown the potential utility of DNA methylation as a clinically useful diagnostic test to detect current heavy alcohol consumption.
Original language | English |
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Pages (from-to) | 422-433 |
Number of pages | 12 |
Journal | Molecular Psychiatry |
Volume | 23 |
Issue number | 2 |
DOIs | |
State | Published - Feb 1 2018 |
Bibliographical note
Publisher Copyright:© 2018 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
Funding
Funders | Funder number |
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Medical Research Council | MC_UU_12015/1, MR/K026992/1, MC_U106179472, MR/M013111/1, MC_UU_12015/2 |
Medical Research Council | |
National Center for Advancing Translational Sciences (NCATS) | UL1TR000124, UL1TR000454, UL1TR001079, UL1TR001881, UL1TR000040 |
National Center for Advancing Translational Sciences (NCATS) | |
National Institutes of Health/National Institute of Environmental Health Sciences | R01ES015172, ZIAES043012, R01ES021733 |
National Institutes of Health/National Institute of Environmental Health Sciences | |
National Heart, Lung, and Blood Institute (NHLBI) | R01HL111089, R01HL129132, R01HL095163, R01HL116747, R01HL092111, U01HL080295, RC2HL102419, R01HL085083, R01HL105756, R01HL101250, R43HL095161, R43HL095160, R01HL120393, R13HL095166, K99HL136875, R43HL095167, R43HL095169, R21HL095165, ZIAHL006001, R01HL103612, R01HL087652 |
National Heart, Lung, and Blood Institute (NHLBI) | |
National Human Genome Research Institute | R01HG006292 |
National Human Genome Research Institute | |
National Institute on Aging | R01AG023629 |
National Institute on Aging | |
Economic and Social Research Council | ES/N000404/1 |
Economic and Social Research Council | |
National Institute on Alcohol Abuse and Alcoholism | R21AA027450 |
National Institute on Alcohol Abuse and Alcoholism |
ASJC Scopus subject areas
- Psychiatry and Mental health
- Cellular and Molecular Neuroscience
- Molecular Biology