Researchers from Washington University in St. Louis have published a study detailing how alcohol consumption affects gene expression in the brain in a region-specific manner. The work, led by Dr. Gabor Egervari and Erica Periandri, was conducted on male mice and focuses on epigenetic mechanisms—chemical modifications that regulate gene activity without changing the DNA sequence.
The study, published in the journal Neurobiology of Disease, found that alcohol exposure alters histone acetylation, a key epigenetic mark, in brain areas critical for reward processing and addiction, such as the nucleus accumbens. These changes were distinct from those observed in the prefrontal cortex, a region involved in decision-making and impulse control.
Dr. Egervari stated that the research provides a map of how alcohol reprograms the brain's genomic landscape, which could help explain individual vulnerability to alcohol use disorder. The findings underscore that the brain does not respond to alcohol uniformly, with implications for developing more targeted treatments for addiction.
