Evidence suggesting the role of specific genetic factors in cigarette smoking.
Health PsychologyPublished 1 January 1999
Caryn Lerman, Neil E. Caporaso, Janet Audrain, David Main, Elise D. Bowman, Benjamin Lockshin
Citations280
SJR quartileQ1
SJR score1.28
SNIP1.20
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Abstract
Twin studies suggest that propensity to smoke and ability to quit smoking are influenced by genetic factors. As a means of investigating the risk of smoking associated with genetic polymorphisms in the dopamine transporter (SLC6A3) and the D2 dopamine receptor (DRD2) genes, a case-control study of 289 smokers and 233 nonsmoking controls and a case series analysis of smokers were conducted. A significant effect for SLC6A3 and a significant gene-gene interaction were found in a logistic regression model, indicating that individuals with SLC6A3-9 genotypes were significantly less likely to be smokers, especially if they also had DRD2-A2 genotypes. Smokers with SLC6A3-9 genotypes were also significantly less likely to have started smoking before 16 years of age and had prior smoking histories indicating a longer period of prior smoking cessation. This study provides preliminary evidence that the SLC6A3 gene may influence smoking initiation and nicotine dependence.
Keywords
PsychologyMedicine
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