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  Vol. 264 No. 24, December 26, 1990 TABLE OF CONTENTS
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Population and Pedigree Studies Reveal a Lack of Association Between the Dopamine D2 Receptor Gene and Alcoholism

Annabel M. Bolos, MD; Michael Dean, PhD; Susan Lucas-Derse; Mark Ramsburg; Gerald L. Brown, MD; David Goldman, MD

JAMA. 1990;264(24):3156-3160.


Abstract

Using the dopamine D2 receptor clone {lambda}hD2G1, Blum et al recently found that the D2/Taq I allele (A1) was present in 69% of 35 deceased alcoholics but in only 20% of an equal number of controls. To assess this association further, we evaluated the D2/Taq I polymorphism and a single-strand conformation polymorphism detected by polymerase chain reaction and nondenaturing gel electrophoresis (PCR-SSCP) of the 3' noncoding region of the D2 receptor gene. We studied 40 unrelated white alcoholics, 127 racially matched controls, and two white pedigrees. The Schedule for Affective Disorders and Schizophrenia—Lifetime Version (SADS-L) clinical diagnostic interviews were rated blindly by two clinicians. The SADS-L interviews and other data were then used to ascertain diagnoses according to the Diagnostic and Statistical Manual of Mental Disorders, Revised Third Edition (DSM-III-R) criteria. Alcoholics were subtyped according to age of onset, severity, presence of antisocial personality, and family history. No significant differences in either D2/Taq I or PCR-SSCP allele frequencies were observed between alcoholics, subpopulations of alcoholics, or controls. The PCR-SSCP polymorphism provided independent information against linkage at the D2 receptor locus. Several recombinants between the D2/Taq I locus and alcoholism were observed in two white families with an alcoholic parent who possessed the A1 allele. This study does not support a widespread or consistent association between the D2 receptor gene and alcoholism.

(JAMA. 1990;264:3156-3160)



Author Affiliations

From the Section on Genetic Studies (Drs Bolos and Goldman), and Unit of Family Studies (Dr Brown), Laboratory of Clinical Studies, National Institute on Alcohol Abuse and Alcoholism, Bethesda, Md; and Program Resources Inc, Frederick, Md (Dr Dean, Ms Lucas-Derse, and Mr Ramsburg).


Footnotes

Reprint requests to Section on Genetic Studies, Laboratory of Clinical Studies, National Institute on Alcohol Abuse and Alcoholism, 9000 Rockville Pike, Bldg 10, Room 3C-102, Bethesda, MD 20892 (Dr Goldman).



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