Serotonin transporter gene polymorphisms in alcohol dependence.
- Authors
- Thompson, M D; Gonzalez, N; Nguyen, T; Comings, D E; George, S R; O'Dowd, B F
- Year
- 2000
- Journal
- Alcohol (Fayetteville, N.Y.)
- PMID
- 11113619
- DOI
- 10.1016/s0741-8329(00)00105-1
The serotonin transporter (5-HTT) gene is a candidate gene in alcohol dependence because serotonin reuptake inhibitors (SRIs) can alleviate alcohol withdrawal. Studies of the 5-HTT gene in alcohol dependence have not resulted in a consensus. Recent studies have examined the transcriptionally active promoter polymorphism, a 44-bp deletion resulting in short (S) or long (L) alleles. In this study, 131 alcohol-dependent patients of Northern and Western European descent were genotyped. Seventy of these patients were diagnosed with alcohol dependence without comorbid disorders. Sixty-one patients were diagnosed with alcohol dependence comorbid with Tourette syndrome (alcoholic-TS). We found an excess of the S allele in alcohol-dependent patients (47%) compared with 125 ethnically matched controls (39%). A similar trend was found in 150 ethnically matched TS patients without alcohol dependence comorbidity (51%). However, the statistical significance of this trend in the data was not present after Bonferroni correction. The data presented suggests a trend toward increased frequency of the S promoter allele in alcohol-dependent, alcoholic-TS and TS patients.
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