title: No association between dopamine D4 receptor gene -521 C/T polymorphism and tardive dyskinesia in schizophrenia.
abstract: Tardive dyskinesia (TD) is a long-term adverse effect of antipsychotics. We evaluated whether a candidate functional polymorphism of the dopamine D4 receptor (DRD4) gene is associated with drug-induced TD in 209 Korean schizophrenic patients with TD (n = 83) and without TD (n = 126) who were matched for antipsychotic drug exposure and other relevant variables. There was no significant association of the genotype and allele frequencies determined by the -521 C/T SNP of DRD4 between TD and non-TD patients. In addition, there was no significant difference in terms of total Abnormal Involuntary Movement Scale scores among the 3 genotype groups. Within the limitations imposed by the size of the clinical sample, these findings suggest that the DRD4 -521 C/T SNP does not contribute significantly to the risk for TD.
authors.affiliation: Department of Psychiatry, Korea University College of Medicine, Seoul, South Korea.
authors.forename: Heon-Jeong
authors.initials: HJ
authors.lastname: Lee
authors.forename: Seung-Gul
authors.initials: SG
authors.lastname: Kang
authors.forename: Jung-Eun
authors.initials: JE
authors.lastname: Choi
authors.forename: Jong-Woo
authors.initials: JW
authors.lastname: Paik
authors.forename: Yong-Ku
authors.initials: YK
authors.lastname: Kim
authors.forename: Seung-Hyun
authors.initials: SH
authors.lastname: Kim
authors.forename: Min-Soo
authors.initials: MS
authors.lastname: Lee
authors.forename: Sook-Haeng
authors.initials: SH
authors.lastname: Joe
authors.forename: In-Kwa
authors.initials: IK
authors.lastname: Jung
authors.forename: Leen
authors.initials: L
authors.lastname: Kim
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D014150:Antipsychotic Agents / Q000009:adverse effects; D016009:Chi-Square Distribution; D004252:DNA Mutational Analysis; D004409:Dyskinesia, Drug-Induced / Q000209:etiology / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D050638:Receptors, Dopamine D4 / Q000235:genetics*; D012559:Schizophrenia / Q000188:drug therapy
chemical_list: D014150:Antipsychotic Agents; C493599:DRD4 protein, human; D050638:Receptors, Dopamine D4