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Genetics of alcohol dependence.
Joel Gelernter1, Henry R Kranzler
1Department of Psychiatry, VAMC 116A2, Yale University School of Medicine, 950 Campbell Avenue, West Haven, CT 06516, USA. joel.gelernter@yale.edu
Human Genetics
|June 18, 2009
Summary
Genetic factors significantly influence alcohol dependence (AD). While alcohol-metabolizing enzymes were early discoveries, new research identifies additional genes contributing to AD risk, promising further insights into this complex condition.
Area of Science:
- Genetics
- Neuroscience
- Public Health
Background:
- Alcohol dependence (AD) is a complex, genetically influenced condition with significant societal and individual costs.
- Historically, genes involved in alcohol metabolism were the primary known genetic risk factors for AD.
- Recent advancements have identified additional confirmed genetic risk loci for AD.
Purpose of the Study:
- To review the current understanding of genetic influences on alcohol dependence.
- To highlight the discovery of new genetic risk loci beyond alcohol-metabolizing enzymes.
- To emphasize the potential of novel genomic methodologies in identifying further AD susceptibility genes.
Main Methods:
- Review of linkage and candidate gene association studies.
- Discussion of emerging genomic techniques such as genomewide association studies (GWAS).
- Exploration of copy number variation (CNV) analysis and deep sequencing.
Main Results:
- Several genes beyond those encoding alcohol-metabolizing enzymes are now confirmed risk loci for AD.
- The physiological mechanisms of these newly identified risk loci are still under investigation.
- A small fraction of the total genetic contribution to AD risk has been identified to date.
Conclusions:
- Understanding the genetic architecture of AD is evolving with new discoveries.
- Advanced genomic technologies are crucial for identifying a broader spectrum of AD susceptibility genes.
- Further research is needed to elucidate the function of identified risk loci and uncover additional genetic factors.
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