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BMC Medical Genetics
Published in: BMC Medical Genetics 1/2010

Open Access 01-12-2010 | Research article

Dopamine D2 receptor polymorphisms and susceptibility to alcohol dependence in Indian males: a preliminary study

Authors: Pushplata Prasad, Atul Ambekar, Meera Vaswani

Published in: BMC Medical Genetics | Issue 1/2010

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Abstract

Background

Dopamine is an important neurotransmitter involved in reward mechanism in the brain and thereby influences development and relapse of alcohol dependence. The dopamine D2 receptor (DRD2) gene on chromosome 11 (q22-q23) has been found to be associated with increased alcohol consumption through mechanisms involving incentive salience attributions and craving in alcoholic patients. Therefore, we investigated the association of three single nucleotide polymorphisms (SNP) in DRD2 gene with alcohol dependence in the north Indian subjects.

Methods

In a retrospective analysis, genetic association of three polymorphisms from DRD2 gene with alcohol dependence was investigated using a case-control approach. Alcohol dependence was determined by DSM-IV criteria and a total of 90 alcoholics and 60 healthy unrelated age-matched control subjects were recruited. Odds ratio and confidence interval was calculated to determine risk conferred by a predisposing allele/genotype/haplotype. Logistic regression analysis was carried out to correlate various clinical parameters with genotypes, and to study pair-wise interactions between SNPs.

Results

The study showed a significant association of -141C Ins allele and a trend of association of TaqI A1 allele of DRD2 with alcohol dependence. Haplotype with the predisposing -141C Ins and TaqI A1 alleles (-141C Ins-A-A1) seems to confer ≈ 2.5 times more risk to develop alcohol dependence.

Conclusions

The study provides preliminary insight into genetic risk to alcohol dependence in Indian males. Two polymorphisms namely, -141C Ins/Del and TaqI A in DRD2 gene may have clinical implications among Indian alcoholic subjects.
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Metadata
Title
Dopamine D2 receptor polymorphisms and susceptibility to alcohol dependence in Indian males: a preliminary study
Authors
Pushplata Prasad
Atul Ambekar
Meera Vaswani
Publication date
01-12-2010
Publisher
BioMed Central
Published in
BMC Medical Genetics / Issue 1/2010
Electronic ISSN: 1471-2350
DOI
https://doi.org/10.1186/1471-2350-11-24

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