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. 2019 Jul;18(6):e12579.
doi: 10.1111/gbb.12579. Epub 2019 Jun 4.

Genome-wide association studies of alcohol dependence, DSM-IV criterion count and individual criteria

Dongbing Lai  1 , Leah Wetherill  1 , Sarah Bertelsen  2 , Caitlin E Carey  3 , Chella Kamarajan  4 , Manav Kapoor  2 , Jacquelyn L Meyers  4 , Andrey P Anokhin  5 , David A Bennett  6 , Kathleen K Bucholz  5 , Katharine K Chang  3 , Philip L De Jager  7   8 , Danielle M Dick  9 , Victor Hesselbrock  10 , John Kramer  11 , Samuel Kuperman  11 , John I Nurnberger Jr  1   12 , Towfique Raj  2 , Marc Schuckit  13 , Denise M Scott  14   15 , Robert E Taylor  16 , Jay Tischfield  17 , Ahmad R Hariri  18 , Howard J Edenberg  1   19 , Arpana Agrawal  5 , Ryan Bogdan  3 , Bernice Porjesz  4 , Alison M Goate  2 , Tatiana Foroud  1
Affiliations

Genome-wide association studies of alcohol dependence, DSM-IV criterion count and individual criteria

Dongbing Lai et al. Genes Brain Behav. 2019 Jul.

Abstract

Genome-wide association studies (GWAS) of alcohol dependence (AD) have reliably identified variation within alcohol metabolizing genes (eg, ADH1B) but have inconsistently located other signals, which may be partially attributable to symptom heterogeneity underlying the disorder. We conducted GWAS of DSM-IV AD (primary analysis), DSM-IV AD criterion count (secondary analysis), and individual dependence criteria (tertiary analysis) among 7418 (1121 families) European American (EA) individuals from the Collaborative Study on the Genetics of Alcoholism (COGA). Trans-ancestral meta-analyses combined these results with data from 3175 (585 families) African-American (AA) individuals from COGA. In the EA GWAS, three loci were genome-wide significant: rs1229984 in ADH1B for AD criterion count (P = 4.16E-11) and Desire to cut drinking (P = 1.21E-11); rs188227250 (chromosome 8, Drinking more than intended, P = 6.72E-09); rs1912461 (chromosome 15, Time spent drinking, P = 1.77E-08). In the trans-ancestral meta-analysis, rs1229984 was associated with multiple phenotypes and two additional loci were genome-wide significant: rs61826952 (chromosome 1, DSM-IV AD, P = 8.42E-11); rs7597960 (chromosome 2, Time spent drinking, P = 1.22E-08). Associations with rs1229984 and rs18822750 were replicated in independent datasets. Polygenic risk scores derived from the EA GWAS of AD predicted AD in two EA datasets (P < .01; 0.61%-1.82% of variance). Identified novel variants (ie, rs1912461, rs61826952) were associated with differential central evoked theta power (loss - gain; P = .0037) and reward-related ventral striatum reactivity (P = .008), respectively. This study suggests that studying individual criteria may unveil new insights into the genetic etiology of AD liability.

Keywords: DSM-IV alcohol dependence criterion; DSM-IV criterion count; DSM-IV individual criteria; alcohol dependence; event-related theta oscillations; functional magnetic resonance imaging; genome-wide association study; item response analysis; meta-analysis; polygenic risk score.

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Conflict of interest statement

No other authors report biomedical financial interests or potential conflicts of interest.

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