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Family-based study of the association of the dopamine D2 receptor gene (DRD2) with habitual smoking

✍ Scribed by Bierut, Laura Jean; Rice, John P.; Edenberg, Howard J.; Goate, Alison; Foroud, Tatiana; Cloninger, C. Robert; Begleiter, Henri; Conneally, P. Michael; Crowe, Raymond R.; Hesselbrock, Victor; Li, Ting-Kai; Nurnberger, John I.; Porjesz, Bernice; Schuckit, Marc A.; Reich, Theodore

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 16 KB
Volume: 90
Category: Article
ISSN: 0148-7299
DOI: 10.1002/(sici)1096-8628(20000214)90:4<299::aid-ajmg7>3.0.co;2-y

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✦ Synopsis

A recent study showed an association between the dopamine D2 receptor gene (DRD2) and smoking. The purpose of this study was to determine if the familial transmission of smoking is linked to variation at the DRD2 locus in a genetically informative sample. Subjects were identified in alcohol treatment centers and their relatives were recruited for study. All subjects were interviewed to assess alcohol dependence, smoking habits, and psychiatric disorders. Two polymorphisms within the DRD2 gene were analyzed, including the TaqIA polymorphism. The sample consisted of 138 nuclear families with at least one offspring with habitual smoking, and analysis was by the transmission disequilibrium test (TDT), which avoids problems due to population stratification. There was no significant difference in the frequency between DRD2 alleles transmitted and not transmitted to habitual smokers. There also was no evidence for unequal transmission of DRD2 alleles for the phenotypes "ever smoker" or comorbid alcohol dependence and habitual smoking. This study does not support linkage of the DRD2 with smoking. Am.

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