Association study of dopamine D1 receptor gene and cognitive function of first-episode schizophrenic patients / 中华行为医学与脑科学杂志

ABSTRACT

Objective To investigate the relationship between cognitive function of first-episode schizophrenic patients and dopamine D1 receptor gene. Methods A total of 112 first-episode schizophrenic patients and 60 healthy controls were evaluated with Wechsler adult intelligence scale ( WAIS-R), Wechsler memory scale (WMS) and Wisconsin card sort test (WCST) ,and genotyped one polymorphism (rs4532) within DRD1 gene using TaqMan SNP genotyping assay. Results There were no significant differences on the frequencies of the genotypes and alleles of rs4532 polymorphism between patients with schizophrenia and normal controls ( x2 =2.90, P=0.35; x2 = 0.01, P= 0. 93 ). There were significant differences in all index of WCST between two groups (P ＜0.01 ). Patients with rs4532G allele had worse WCST performance than those without G allele ((60.9 ± 13.2)%vs (44.9 ±21.3)%, t=4.79, P=0.00002). Conclusion Rs4532 polymorphism of DRD1 gene may be associated with executive function impairment in schizophrenic patients.