title: Lack of association between VNTR polymorphism of dopamine transporter gene (SLC6A3) and schizophrenia in a Brazilian sample.
abstract: A role of dopaminergic dysfunction has been postulated in the aetiology of schizophrenia. We hypothesized that variations in the dopamine transporter gene (SLC6A3) may be associated with schizophrenia. We conducted case-control and family based analysis on the polymorphic SLC6A3 variable number tandem repeat (VNTR) in a sample of 220 schizophrenic patients, 226 gender and ethnic matched controls, and 49 additional case-parent trios. No differences were found in allelic or genotypic distributions between cases and controls and no significant transmission distortions from heterozygous parents to schizophrenic offspring were detected. Thus, our results do not support an association of the SLC6A3 VNTR with schizophrenia in our sample.
authors.affiliation: Department of Psychiatry, University of Sao Paulo, São Paulo, SP, Brazil.
authors.forename: Quirino
authors.initials: Q
authors.lastname: Cordeiro
authors.forename: Michael
authors.initials: M
authors.lastname: Talkowski
authors.forename: Joel
authors.initials: J
authors.lastname: Wood
authors.forename: Eliza
authors.initials: E
authors.lastname: Ikenaga
authors.forename: Homero
authors.initials: H
authors.lastname: Vallada
mesh_terms: D000483:Alleles; D001938:Brazil; D016022:Case-Control Studies; D050483:Dopamine Plasma Membrane Transport Proteins / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008297:Male; D018598:Minisatellite Repeats / Q000235:genetics*; D011110:Polymorphism, Genetic / Q000235:genetics*; D012559:Schizophrenia / Q000235:genetics*
chemical_list: D050483:Dopamine Plasma Membrane Transport Proteins; C493214:SLC6A3 protein, human