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[Genetic factors in alcohol dependence]
Nicolas Ramoz1, Philip Gorwood2
1Université Paris-Descartes, centre de psychiatrie et neurosciences, inserm UMRS894, Sorbonne Paris Cité, 102-108, rue de la Santé, 75014 Paris, France.
Presse Medicale (Paris, France : 1983)
|December 25, 2017
Summary
Genetic factors significantly influence alcohol dependence risk, with specific gene variations impacting susceptibility. Environmental interactions, including epigenetics, also play a crucial role in alcohol use disorder predisposition.
Area of Science:
- Genetics
- Neuroscience
- Pharmacology
Background:
- Alcohol dependence has a significant genetic component, with heritability estimated around 0.5.
- Identifying genetic markers is crucial for understanding alcohol dependence predisposition.
- Gene-environment interactions, particularly epigenetics, modulate susceptibility.
Purpose of the Study:
- To explore the genetic underpinnings of alcohol dependence.
- To identify specific genes and genetic variations associated with alcohol dependence.
- To understand the role of gene-environment interactions in alcohol dependence.
Main Methods:
- Genome-wide sequencing and polymorphism analysis.
- Investigating genes involved in brain reward pathways (e.g., DRD2, ANKK1).
- Analyzing variants in genes encoding GABA receptors and metabolic enzymes (ADH, ALDH).
Main Results:
- Polymorphisms in DRD2 and ANKK1 genes are linked to alcohol dependence.
- Variants in GABA receptor genes are associated with alcohol dependence.
- Specific ADH and ALDH gene polymorphisms confer susceptibility or protection against alcohol dependence.
Conclusions:
- Genetic factors, including variations in reward pathway, GABA, and metabolic genes, are key determinants of alcohol dependence.
- Epigenetic modifications mediate the influence of environmental factors on alcohol dependence risk.
- Understanding these genetic and environmental interactions is vital for developing targeted interventions.
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