title: Assessment of association of D3 dopamine receptor MscI polymorphism with schizophrenia: analysis of symptom ratings, family history, age at onset, and movement disorders.
abstract: Several studies have reported an association between schizophrenia and homozygosity for the MscI restriction site in exon 1 of the D3 dopamine receptor gene, but other studies have failed to find this association. Recent reports have suggested that the association is most salient in male patients with a family history of schizophrenia. We examined this restriction site in a group of schizophrenic patients (n = 84) and in normal controls (n = 77). Patients were subdivided according to demographic and clinical features, particular attention being paid to movement disorders. No significant difference in allelic or genotypic distribution was seen between the two groups. No association was seen between homozygosity and a positive family history, age at onset of illness, clinical subtype, negative symptom score, or movement disorder scores.
authors.affiliation: Department of Experimental Psychology, Cambridge University, United Kingdom.
authors.forename: E J
authors.initials: EJ
authors.lastname: Gaitonde
authors.forename: A
authors.initials: A
authors.lastname: Morris
authors.forename: S
authors.initials: S
authors.lastname: Sivagnanasundaram
authors.forename: P J
authors.initials: PJ
authors.lastname: McKenna
authors.forename: D M
authors.initials: DM
authors.lastname: Hunt
authors.forename: J D
authors.initials: JD
authors.lastname: Mollon
mesh_terms: D016009:Chi-Square Distribution; D004247:DNA / Q000097:blood; D017931:DNA Primers; D015252:Deoxyribonucleases, Type II Site-Specific; D005190:Family; D005260:Female; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D008297:Male; D009069:Movement Disorders; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D017448:Receptors, Dopamine D2 / Q000235:genetics*; D050637:Receptors, Dopamine D3; D012016:Reference Values; D012044:Regression Analysis; D012559:Schizophrenia / Q000235:genetics* / Q000503:physiopathology; D012565:Schizophrenic Psychology
chemical_list: D017931:DNA Primers; C493593:DRD3 protein, human; D017448:Receptors, Dopamine D2; D050637:Receptors, Dopamine D3; D004247:DNA; D015252:Deoxyribonucleases, Type II Site-Specific; C060616:TGGCCA-specific type II deoxyribonucleases