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Associations Between ADH Gene Variants and Alcohol Phenotypes in Dutch Adults

Published online by Cambridge University Press:  21 February 2012

Jenny H. D. A. van Beek*
Affiliation:
Department of Biological Psychology, VU University Amsterdam, The Netherlands. JHDA.van.Beek@psy.vu.nl
Gonneke Willemsen
Affiliation:
Department of Biological Psychology, VU University Amsterdam, The Netherlands.
Marleen H. M. de Moor
Affiliation:
Department of Biological Psychology, VU University Amsterdam, The Netherlands.
Jouke Jan Hottenga
Affiliation:
Department of Biological Psychology, VU University Amsterdam, The Netherlands.
Dorret I. Boomsma
Affiliation:
Department of Biological Psychology, VU University Amsterdam, The Netherlands.
*
*Address for correspondence: VU University Amsterdam, Department of Biological Psychology, van der Boechorststraat 1, 1081 BT Amsterdam, The Netherlands.

Abstract

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Recently, Macgregor et al. (2009) demonstrated significant associations of ADH polymorphisms with reactions to alcohol and alcohol consumption measures in an Australian sample. The aim of the present study was to replicate these findings in a Dutch sample. Survey data on alcohol phenotypes came from 1,754 unrelated individuals registered with the Netherlands Twin Register. SNPs in the ADH gene cluster located on chromosome 4q (n = 491) were subdivided in seven gene sets: ADH5, ADH4, ADH6, ADH1A, ADH1B, ADH1C and ADH7. Within these sets associations of SNPs with alcohol consumption measures, age at onset variables, reactions to alcohol and problem drinking liability were examined. Of the original 38 SNPs studied by Macgregor et al. (2009), six SNPs were not available in our dataset, because one of them had a minor allele frequency < .01 (rs1229984) and five could not be imputed. The remaining SNP associations with alcohol phenotypes as identified by Macgregor et al. (2009) were not replicated in the Dutch sample, after correcting for multiple genotype and phenotype testing. Significant associations were found however, for reactions to alcohol with a SNP in ADH5 (rs6827292, p = .001) and a SNP just upstream of ADH5 (rs6819724, p = .0007) that is in strong LD with rs6827292. Furthermore, an association between age at onset of regular alcohol use and a SNP just upstream of ADH7 (rs2654849, p = .003) was observed. No significant associations were found for alcohol consumption and problem drinking liability. Although these findings do not replicate the earlier findings at the SNP level, the results confirm the role of the ADH gene cluster in alcohol phenotypes.

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