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Association of a D2S2944 allele with depression specifically among those with substance abuse or antisocial personality
Journal article   Peer reviewed

Association of a D2S2944 allele with depression specifically among those with substance abuse or antisocial personality

Douglas R Langbehn, Robert Philibert, Kristin M Caspers, Rebecca Yucuis and Remi J Cadoret
Drug and alcohol dependence, Vol.83(1), pp.33-41
2006
DOI: 10.1016/j.drugalcdep.2005.10.006
PMID: 16289859

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Abstract

Associations have previously been reported between a 124-bp allele at D2S2944 and recurrent, early-onset depression in women. These earlier reports also noted but did not emphasize a possible association between this allele and alcohol-specific depression. We have analyzed the Iowa Adoption Study data to test this association. D2S2944 allele typing was available for 247 subjects from the Iowa Adoption Studies. Information on lifetime affective, alcohol, drug, and antisocial personality (ASPD) disorders was available from a structured interview. We used logistic regression to analyze adjusted and interactive D2S2944 associations with depression. Controlling other risk factors, the 124-bp allele had a strong association with DSM-IV major depression specific to those with histories of alcohol abuse/dependence and/or ASPD. (Overlap between the two prevented further specification of the interaction.) The association was not gender-specific and was not limited to alcohol-related depressive episodes. This relationship appears stronger than the D2S2944 association previously reported for early-onset depression in women. We note that, in combination with additional liabilities towards depression in women and alcoholism/sociopathy in men, the 124-bp allele may provide a basis for the phenomenon of depressive spectrum illness proposed by Winokur.
Depression spectrum Drug abuse Genetic marker Alcoholism Antisocial personality Linkage disequilibrium Substance abuse D2S2944 Logistic regression Major depression Genetic linkage Risk factor Genetics

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