Biological Psychiatry. Main Editor: J. Mendlewicz (Brussels) / Original Paper
Association between the Ser9Gly Polymorphism of the Dopamine D3 Receptor Gene and Tardive Dyskinesia in Chinese Schizophrenic PatientsLiao D.-L.a · Yeh Y.-C.a · Chen H.-M.a · Chen H.a · Hong C.-J.b,c · Tsai S.-J.b,c
aDepartment of Psychiatry, Executive Yuan Department of Health, Pali Psychiatric Hospital, bDepartment of Psychiatry, Veterans General Hospital-Taipei, cDivision of Psychiatry, School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
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It has been suggested that dopamine D3 receptor (DRD3) may have important implications for antipsychotic-induced tardive dyskinesia (TD). Previous studies have demonstrated an association between a serine to glycine polymorphism in the first exon of the DRD3 gene and TD; however, the results have been inconsistent. Therefore, we have replicated these studies using a Chinese sample population. A total of 115 schizophrenic patients from chronic wards were assessed for TD severity using the Abnormal Involuntary Movements Scale (AIMS) and were subsequently genotyped for the DRD3 polymorphism. The mean AIMS score for patients carrying the heterozygote (DRD3ser-gly) was significantly greater than for those with the homozygotes (DRD3ser-ser and DRD3gly-gly). Our results are in line with a previous report, the results of which suggest that the presence of the DRD3ser-gly genotype may be a risk factor for the development of TD in patients treated with antipsychotics.
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