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Methylated DNA Immunoprecipitation
Published on: January 2, 2009
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DNA methylation age is accelerated in alcohol dependence
Allison D Rosen1, Keith D Robertson2, Ryan A Hlady2
1Section on Clinical Genomics and Experimental Therapeutics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA.
Translational Psychiatry
|September 7, 2018
Summary
Excessive alcohol consumption may accelerate biological aging, as indicated by epigenetic clocks in blood and liver tissues. This effect appears to be tissue-specific, with brain tissue showing a different trend.
Area of Science:
- Epigenetics
- Alcohol Dependence Research
- Aging Biology
Background:
- Alcohol dependence (ALC) is a major public health concern, linked to chronic disease and premature mortality.
- Chronic heavy alcohol use is associated with altered DNA methylation patterns.
- DNA methylation levels at specific CpG sites correlate with chronological age.
Purpose of the Study:
- To investigate the association between excessive alcohol consumption and epigenetic aging using an epigenetic clock.
- To explore this relationship across different tissue types (blood, liver, prefrontal cortex).
Main Methods:
- Utilized DNA methylation data from five independent cohorts.
- Analyzed data from blood, liver, and postmortem prefrontal cortex samples.
- Applied an epigenetic clock to assess age acceleration in relation to alcohol dependence.
Main Results:
- Significant positive age acceleration was observed in one blood dataset (p < 0.0001) and one liver dataset (p = 0.0069) from individuals with ALC.
- Other blood and liver datasets showed non-significant trends of positive age acceleration.
- Prefrontal cortex tissue exhibited a trend of negative age acceleration (p = 0.19).
Conclusions:
- Excessive alcohol consumption may be linked to epigenetic aging in a tissue-specific manner.
- Findings suggest that alcohol's impact on biological aging varies by tissue type.
- Further research with multi-tissue samples from individuals is warranted to confirm these observations.
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