title: [Effect of dopaminergic and serotonergic gene variants on cognitive performance].
abstract: According to twin studies heritability of cognitive skills is substantial, however, little is known about the gene variants responsible for coding individual variability. Results of candidate gene studies implicate an important role of the dopaminergic system in coding individual differences in reaction time performance, and the possible role of the function of the serotonergic system has also emerged.
  
  
  OBJECTIVE
  The aim of our study was to carry out association analyses between performance on the Stroop-task and selected gene polymorphisms of the dopaminergic and serotonergic system.
  
  
  RESULTS
  In this study we examined 179 young adult's Stroop-performance measuring the attentional inhibition. The number of mistakes showed remarkable individual variability which can be related to the polymorphisms of the dopamine D4 receptor gene according to several previous studies. The short and long variations of the variable number tandem repeat polymorphism in the promoter region of the serotonin transporter gene was also studied based on the hypothesis of dopamine-serotonin balance.
  
  
  CONCLUSIONS
  Our results demonstrate that the performance in the Stroop task is related to the genetic variants of the dopaminergic, as well as the serotonergic system.
authors.affiliation: Eötvös Loránd Tudományegyetem, Pszichológiai Intézet, Budapest, Hungary.
authors.forename: Rozsa Eniko
authors.initials: RE
authors.lastname: Katonai
authors.forename: Anna
authors.initials: A
authors.lastname: Szekely
authors.forename: Maria
authors.initials: M
authors.lastname: Sasvari-Szekely
mesh_terms: D000293:Adolescent; D000328:Adult; D003071:Cognition; D005260:Female; D006801:Humans; D008297:Male; D018598:Minisatellite Repeats / Q000235:genetics; D011110:Polymorphism, Genetic; D050638:Receptors, Dopamine D4 / Q000235:genetics* / Q000378:metabolism; D012701:Serotonin / Q000235:genetics* / Q000378:metabolism; D050486:Serotonin Plasma Membrane Transport Proteins / Q000235:genetics* / Q000378:metabolism; D055815:Young Adult
chemical_list: C493230:SLC6A4 protein, human; D050486:Serotonin Plasma Membrane Transport Proteins; D050638:Receptors, Dopamine D4; D012701:Serotonin