Journal
ACTA PSYCHIATRICA SCANDINAVICA
Volume 114, Issue 6, Pages 435-438Publisher
WILEY
DOI: 10.1111/j.1600-0447.2006.00874.x
Keywords
dopamine; dopamine-D2 receptor; genetic polymorphism; schizophrenia
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Objective: The objective was to confirm whether a homozygous genotype for the C957 allele of the C957T DRD2 gene single nucleotide polymorphism (SNP) is associated with schizophrenia in an independent study population. Method: We examined the genotypic distribution of this SNP in a set of clinically ascertained schizophrenic patients (n = 131) and age-matched control subjects (n = 364). Individuals were genotyped using automated analysis of fluorescently labeled PCR products. Results: The distribution of grouped genotypes for the C957T DRD2 SNP (CC vs. CT, TT) showed that C homozygote genotype was over-represented in our patient sample when compared with control subjects. This difference reaches the statistical significance (chi(2) = 7.0; df = 1; P = 0.008; OR = 2.05; % CI 1.2-3.4). Conclusion; The findings of this study provide additional evidence that genetic variation at the DRD2 gene plays an important role in the vulnerability to schizophrenia.
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