A genome-wide association study of alcohol dependence

Laura J. Bierut, Arpana Agrawal, Kathleen K. Bucholz, Kimberly F. Doheny, Cathy Laurie, Elizabeth Pugh, Sherri Fisher, Louis Fox, William Howells, Sarah Bertelsen, Anthony L. Hinrichs, Laura Almasy, Naomi Breslau, Robert C. Culverhouse, Danielle M. Dick, Howard J. Edenberg, Tatiana Foroud, Richard A. Grucza, Dorothy Hatsukami, Victor HesselbrockEric O. Johnson, John Kramer, Robert F. Krueger, Samuel Kuperman, Michael Lynskey, Karl Mann, Rosalind J. Neuman, Markus M. Nöthen, John I. Nurnberger, Bernice Porjesz, Monika Ridinger, Nancy L. Saccone, Scott F. Saccone, Marc A. Schuckit, Jay A. Tischfield, Jen C. Wang, Marcella Rietschel, Alison M. Goate, John P. Rice

Research output: Contribution to journalArticlepeer-review

Abstract

Excessive alcohol consumption is one of the leading causes of preventable death in the United States. Approximately 14%of those who use alcohol meet criteria during their lifetime for alcohol dependence, which is characterized by tolerance, withdrawal, inability to stop drinking, and continued drinking despite serious psychological or physiological problems.We explored genetic influences on alcohol dependence among 1,897 European-American and African-American subjects with alcohol dependence compared with 1,932 unrelated, alcohol-exposed, nondependent controls. Constitutional DNA of each subjectwas genotyped using the Illumina 1M beadchip. Fifteen SNPs yielded P < 10 -5, but in two independent replication series, no SNP passed a replication threshold of P < 0.05. Candidate gene GABRA2, which encodes the GABA receptor α2 subunit, was evaluated independently. Five SNPs at GABRA2 yielded nominal (uncorrected) P < 0.05, with odds ratios between 1.11 and 1.16. Further dissection of the alcoholismphenotype, to disentangle the influence of comorbid substance-use disorders, will be a next step in identifying genetic variants associated with alcohol dependence.

Original languageEnglish (US)
Pages (from-to)5082-5087
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume107
Issue number11
DOIs
StatePublished - Mar 16 2010

Keywords

  • Candidate genes
  • Genetics

ASJC Scopus subject areas

  • General

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