title: Association between tridimensional personality questionnaire (TPQ) traits and three functional polymorphisms: dopamine receptor D4 (DRD4), serotonin transporter promoter region (5-HTTLPR) and catechol O-methyltransferase (COMT).
abstract: Dopamine D4 receptor (DRD4), serotonin transporter promoter regulatory region (5-HTTLPR) and catechol O-methyltransferase (COMT) polymorphisms were examined for association with TPQ personality factors in 455 subjects. Significant interactions were observed by multivariate analysis, (COMT x 5-HTTLPR: Hotelling's Trace = 2.3, P = 0.02) and by subsequent univariate 3-way ANOVA when Novelty Seeking (NS) was the dependent variable: 5-HTTLPR x D4DR (F = 6.18, P = 0.03) and COMT x 5-HTTLPR (F = 4.42, P = 0.03). In the absence of the short 5-HTTLPR allele and in the presence of the high enzyme activity COMT val/val genotype, NS scores are higher in the presence of the DRD4 seven-repeat allele. The effect of these three polymorphisms on NS was also examined using a within-families design. Siblings who shared identical genotype groups for all three polymorphisms (COMT, DRD4 and 5-HTTLPR) had significantly correlated NS scores (intraclass coefficient = 0.39, F = 2.26, P = 0.008, n = 49) whereas sibs with dissimilar genotypes in at least one polymorphism showed no significant correlation for NS scores (intraclass coefficient = 0.177, F = 1.43, P = 0.09, n = 110). Similar interactions were also observed between these three polymorphisms and Novelty Seeking when the 150 independently recruited and non-related subjects were analyzed. The current results are consistent with two earlier reports in which we demonstrated an interaction between the 5-HTTLPR and DRD4 polymorphisms in 2-week-old neonates, in the same children assessed again at 2 months of age and in adults. Molecular Psychiatry (2000) 5, 96-100.
authors.affiliation: Faculty of Health Sciences, Ben Gurion University of the Negev, Israel.
authors.forename: J
authors.initials: J
authors.lastname: Benjamin
authors.forename: Y
authors.initials: Y
authors.lastname: Osher
authors.forename: M
authors.initials: M
authors.lastname: Kotler
authors.forename: I
authors.initials: I
authors.lastname: Gritsenko
authors.forename: L
authors.initials: L
authors.lastname: Nemanov
authors.forename: R H
authors.initials: RH
authors.lastname: Belmaker
authors.forename: R P
authors.initials: RP
authors.lastname: Ebstein
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000201:enzymology; D001923:Brain Chemistry / Q000235:genetics; D002352:Carrier Proteins / Q000235:genetics*; D002394:Catechol O-Methyltransferase / Q000235:genetics*; D005106:Exploratory Behavior; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D008562:Membrane Glycoproteins / Q000235:genetics*; D026901:Membrane Transport Proteins; D009419:Nerve Tissue Proteins; D009679:Nuclear Family; D010551:Personality / Q000235:genetics*; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic / Q000235:genetics; D017448:Receptors, Dopamine D2 / Q000235:genetics*; D050638:Receptors, Dopamine D4; D050486:Serotonin Plasma Membrane Transport Proteins; D011795:Surveys and Questionnaires
chemical_list: D002352:Carrier Proteins; C493599:DRD4 protein, human; D008562:Membrane Glycoproteins; D026901:Membrane Transport Proteins; D009419:Nerve Tissue Proteins; D017448:Receptors, Dopamine D2; C493230:SLC6A4 protein, human; D050486:Serotonin Plasma Membrane Transport Proteins; D050638:Receptors, Dopamine D4; D002394:Catechol O-Methyltransferase