Do Alcohol-dependent Individuals with DRD2 A1 Allele Have an Increased Risk of Relapse?: A Pilot Study
2011 (English)In: Alcohol and Alcoholism, ISSN 0735-0414, E-ISSN 1464-3502, Vol. 46, no 5, 509-513 p.Article in journal (Refereed) Published
Aims: The TaqIA polymorphism of the dopamine D2 receptor (DRD2) gene has been extensively studied in relation to alcoholism, and the TaqI A1 allele appears to be over-represented in alcohol-dependent individuals. In a recent study, this allele has also been associated with a highly increased mortality rate in alcohol-dependent individuals. In the present study, we investigated whether the TaqI A1 allele of the DRD2 gene region was associated with a higher relapse rate in alcohol-dependent individuals. Methods: Adult women (n = 10) and men (n = 40) with a diagnosis of alcohol-dependence were recruited from two Swedish 12-step treatment units for alcoholism. Subjects were genotyped for the TaqIA polymorphism. On average, 11/2 year after the end of the treatment program, subjects were re-interviewed by using the alcohol-related items from the Addiction Severity Index follow-up version. Results: Thirty-three (66%) subjects self-reported relapse and 17 (34%) abstinence during the follow-up period. Thirty-sex percent (18/50) were carriers of the A1 allele of the DRD2 gene region, and 64% (32/50) were non-carriers. Among the carriers of the A1 allele, 89% (16/18) reported relapse in contrast to 53% (17/32) in the non-carriers (P = 0.01; odds ratio = 7.1). Conclusion: The present study is, to our knowledge, the first report of an association between the TaqI A1 allele and a substantially increased relapse rate. It should be emphasized that the number of subjects is relatively small, and this investigation should therefore be considered as a pilot study.
Place, publisher, year, edition, pages
2011. Vol. 46, no 5, 509-513 p.
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-158576DOI: 10.1093/alcalc/agr045ISI: 000294066300001OAI: oai:DiVA.org:uu-158576DiVA: diva2:440488