Opposite Epigenetic Associations With Alcohol Use and Exercise Intervention

Area of Science:

• Epigenetics
• Neuroscience
• Public Health

Background:

• Alcohol use disorder (AUD) involves genetic and environmental factors, with epigenetic regulation playing a key role in neuroadaptation.
• Epigenetic patterns, specifically DNA methylation, can be influenced by lifestyle factors such as exercise.
• The potential for exercise to counteract alcohol-related epigenetic changes is an area of significant research interest.

Purpose of the Study:

• To investigate whether exercise can induce DNA methylation changes opposite to those associated with alcohol consumption.
• To compare DNA methylation patterns between hazardous drinkers and controls, and to assess changes following an exercise intervention.
• To identify specific epigenetic sites and associated genes that may be relevant to AUD and exercise's effects.

Main Methods:

• DNA methylation (DNAm) profiling was conducted on three cohorts: a longitudinal exercise intervention group, a cross-sectional case-control group (hazardous drinkers vs. controls), and a binge drinking cohort.
• Comparative analysis identified differentially methylated sites between drinkers and controls, and between baseline and follow-up in the exercise group.
• Bioinformatic analysis, including gene ontology and pathway enrichment, was used to interpret the functional significance of identified methylation sites.

Main Results:

• 906 DNA methylation sites showed significant differences between drinkers and controls, and were associated with drinking behavior.
• 341 DNA methylation sites were altered after a 12-month exercise intervention.
• Fifteen overlapping sites exhibited opposite DNA methylation changes related to exercise and drinking, with associated genes enriched in synaptic plasticity pathways.

Conclusions:

• Exercise may partially reverse alcohol-induced DNA methylation changes at specific CpG sites.
• These findings suggest a potential epigenetic link between exercise, synaptic plasticity, and AUD.
• Further longitudinal studies are needed to confirm these epigenetic effects and explore their therapeutic potential for AUD prevention and intervention.