Genetic influences on the development of alcoholism.
- Authors
- Enoch, Mary-Anne
- Year
- 2013
- Journal
- Current psychiatry reports
- PMID
- 24091936
- DOI
- 10.1007/s11920-013-0412-1
- PMCID
- PMC4159132
Alcoholism has a substantial heritability yet the detection of specific genetic influences has largely proved elusive. The strongest findings are with genes encoding alcohol metabolizing enzymes. A few candidate genes such as GABRA2 have shown robust associations with alcoholism. Moreover, it has become apparent that variants in stress-related genes such as CRHR1, may only confer risk in individuals exposed to trauma, particularly in early life. Over the past decade there have been tremendous advances in large scale SNP genotyping technologies allowing for genome-wide associations studies (GWAS). As a result, it is now recognized that genetic risk for alcoholism is likely to be due to common variants in very many genes, each of small effect, although rare variants with large effects might also play a role. This has resulted in a paradigm shift away from gene centric studies toward analyses of gene interactions and gene networks within biologically relevant pathways.
Stress-Addictions ArrayThis is an illustration of an Illumina GoldenGate array that was custom designed to include 1350 haplotype tagging single nucleotide polymorphisms (SNPs) within 127 stress- and addictions-related genes. This array was designed for Caucasian and African ancestry, hence the limited number of alcohol metabolism genes. The array also includes 186 ancestry informative markers.
LLM interpretation
This figure is a conceptual diagram illustrating the design of a custom Illumina GoldenGate array. A central circle indicates the array contains 1350 SNPs across 127 genes, with arrows pointing to categorized lists of specific genes. These categories include Stress, Cholinergic, Adrenergic, Other, Drug Metabolism, Dopamine, Serotonin, GABA, Opioid, Glycine, Glutamate, Cannabinoid, and Signal Transduction.
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