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Polymorphism of the Serotonin 2A Receptor Gene (5HTR2A) and Personality Traits

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Abstract

The individual variation of temperament features (such as anxiety, neuroticism, harm avoidance) is determined, among other things, by allele polymorphism of genes involved in serotonin metabolism and has earlier been associated with the insertion/deletion polymorphism of the serotonin transporter gene. Polymorphic alleles of the serotonin 2A receptor gene (5HTR2A) were tested for association with personality traits assessed in several tests. The T102C and A1438G polymorphisms were associated with variation in emotionality, activity, and sociability, which are integral characteristics of temperament. With each polymorphism, differences were significant only between heterozygotes and homozygotes. Carriers of T102C genotype A1/A2 displayed a lower level of anxiety-related traits, a higher score on the Hypomania scale, and a lower score on the Social Introversion scale and were assumed to have higher activity and sociability. Carriers of A1438G genotype A/G differed from homozygotes G/G in having a lower level of social introversion and a lower score on the No Close Friends scale, which testified to higher sociability of heterozygotes. Thus, the polymorphic alleles of 5HTR2A proved to be associated with personality traits in mentally healthy people.

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Authors and Affiliations

  1. Mental Health Research Center, Russian Academy of Medical Sciences, Moscow, 117152, Russia

    V. E. Golimbet, M. V. Alfimova & N. G. Mityushina

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  1. V. E. Golimbet
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  2. M. V. Alfimova
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  3. N. G. Mityushina
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Golimbet, V.E., Alfimova, M.V. & Mityushina, N.G. Polymorphism of the Serotonin 2A Receptor Gene (5HTR2A) and Personality Traits. Molecular Biology 38, 337–344 (2004). https://doi.org/10.1023/B:MBIL.0000032202.83988.09

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  • DOI: https://doi.org/10.1023/B:MBIL.0000032202.83988.09

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