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Common biological networks underlie genetic risk for alcoholism in African- and European-American populations.


ABSTRACT: Alcohol dependence (AD) is a heritable substance addiction with adverse physical and psychological consequences, representing a major health and economic burden on societies worldwide. Genes thus far implicated via linkage, candidate gene and genome-wide association studies (GWAS) account for only a small fraction of its overall risk, with effects varying across ethnic groups. Here we investigate the genetic architecture of alcoholism and report on the extent to which common, genome-wide SNPs collectively account for risk of AD in two US populations, African-Americans (AAs) and European-Americans (EAs). Analyzing GWAS data for two independent case-control sample sets, we compute polymarker scores that are significantly associated with alcoholism (P?=?1.64?×?10(-3) and 2.08?×?10(-4) for EAs and AAs, respectively), reflecting the small individual effects of thousands of variants derived from patterns of allelic architecture that are population specific. Simulations show that disease models based on rare and uncommon causal variants (MAF?

SUBMITTER: Kos MZ 

PROVIDER: S-EPMC3709451 | biostudies-literature | 2013 Jul

REPOSITORIES: biostudies-literature

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Common biological networks underlie genetic risk for alcoholism in African- and European-American populations.

Kos M Z MZ   Yan J J   Dick D M DM   Agrawal A A   Bucholz K K KK   Rice J P JP   Johnson E O EO   Schuckit M M   Kuperman S S   Kramer J J   Goate A M AM   Tischfield J A JA   Foroud T T   Nurnberger J J   Hesselbrock V V   Porjesz B B   Bierut L J LJ   Edenberg H J HJ   Almasy L L  

Genes, brain, and behavior 20130510 5


Alcohol dependence (AD) is a heritable substance addiction with adverse physical and psychological consequences, representing a major health and economic burden on societies worldwide. Genes thus far implicated via linkage, candidate gene and genome-wide association studies (GWAS) account for only a small fraction of its overall risk, with effects varying across ethnic groups. Here we investigate the genetic architecture of alcoholism and report on the extent to which common, genome-wide SNPs co  ...[more]

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