According to psychobiological model of personality proposed by Cloninger, personality traits characterizing enhanced tendency to novel stimuli, impulsivity and sociability are influenced by dopaminergic system functioning. The present study considered both the main effect of two polymorphic loci (VNTR and 2319G>A) in dopamine transporter gene (DAT1) and the role of distinct DAT1 gene haplotypes in personality traits variation in 592 healthy individuals belonging to different ethnicities (men and women). The results of the study revealed the involvement of VNTR and 2319G>A polymorphisms in Novelty Seeking variation and the main effect of 2319G>A polymorphism on Reward Dependence (TCI) observed in Russian females. Moreover, DAT1 gene haplotype effect on Novelty Seeking in Russian females and on Persistence (TCI) in Tatar females was demonstrated. Reported in the current study results pointed to the involvement of dopaminergic system (DAT1 gene in particular) in variation of personality traits characterizing the tendency to novel stimuli, purposefulness, and sociability specifically in women.
Russian Journal of Genetics – Springer Journals
Published: Aug 25, 2009
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