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Sökning: L773:0955 8829

  • Resultat 11-20 av 34
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  • Hiio, Kelli, et al. (författare)
  • Effects of serotonin transporter promoter and BDNF Val66Met genotype on personality traits in a population representative sample of adolescents
  • 2011
  • Ingår i: Psychiatric Genetics. - 0955-8829 .- 1473-5873. ; 21:5, s. 261-264
  • Tidskriftsartikel (refereegranskat)abstract
    • The purpose of this study was to investigate the effects of the 5-HTTLPR and brain-derived neurotrophic factor (BDNF) Val66Met polymorphisms on self-reported Big Five personality traits and their facets in a population representative sample of adolescents. The sample consisted of both cohorts of the Estonian Children Personality Behaviour and Health Study, and personality data were collected during its second waves. The 5-HTTLPR and BDNF Val66Met polymorphisms were genotyped. The BDNF Val66Met had a significant effect on conscientiousness [F(1,807) = 4.32, P = 0.038]. We did not find effects of the 5-HTTLPR polymorphism on the main domains of personality, however, a gene x gene interaction on conscientiousness emerged -BDNF Val66Met Met-allele carriers with the 5-HTTLPR s/s genotype had by far the lowest scores in conscientiousness [F(2,803) = 4.38, P = 0.012]. In addition, we found genotype effects on some facet scales. In conclusion, the BDNF Val66Met genotype Met-allele carriers have lower conscientiousness, and this effect is increased in the 5-HTTLPR s/s individuals.
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  • Jonsson, Lina, 1982, et al. (författare)
  • Association between ASMT and autistic-like traits in children from a Swedish nationwide cohort
  • 2014
  • Ingår i: Psychiatric Genetics. - Stockholm : Lippincott Williams & Wilkins. - 0955-8829 .- 1473-5873. ; 24:1, s. 21-27
  • Tidskriftsartikel (refereegranskat)abstract
    • Individuals with autism spectrum disorders often show low levels of melatonin, and it has been suggested that this decrease may be because of the low activity of the acetylserotonin O-methyltransferase (ASMT), the last enzyme in the melatonin-synthesis pathway. Also, genetic variants in ASMT have been associated with autism, as well as with low ASMT activity and melatonin levels, suggesting that the low ASMT activity observed in autism may partly be because of variations within the ASMT gene. In this study, we present a symptom-based approach to investigate possible associations between ASMT and autistic-like traits in the general population. To this end, continuous measures of autistic-like traits were assessed in a nationally representative twin cohort (n=1771) from Sweden and six single nucleotide polymorphisms (SNPs), and a duplication of exons 2-8 in ASMT were genotyped. Our results show a nominally significant association, in girls, between one single nucleotide polymorphism (rs5949028) in the last intron of ASMT and social interaction impairments. No significant association, however, was observed with traits related to language impairment or restricted and repetitive behavior. In conclusion, our results support the possible involvement of the ASMT gene in autism spectrum disorders, and our finding that only one of the three traits shows association suggests that genetic research may benefit from adopting a symptom-specific approach to identify genes involved in autism psychopathology.
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