title: Association between neuroleptic drug-induced extrapyramidal symptoms and dopamine D2-receptor polymorphisms in Japanese schizophrenic patients.
abstract: The aim of the present study is to examine the relationship between dopamine D2-receptor gene (DRD2) polymorphisms (Taq1A, Taq1B, -141C Ins/Del) and the risk of extrapyramidal adverse effects (EPS), assessed according to the Drug-Induced Extra-Pyramidal Symptoms Scale (DIEPSS), or the maintenance dose of antipsychotics in schizophrenic patients. The DIEPSS score was significantly higher in patients bearing the -141C Del allele than in those without it. Taq1A and Taq1B restriction fragment length polymorphisms (RFLPs) did not significantly affect the DIEPSS score. On the other hand, maintenance doses of neuroleptics and antiparkinsonian drugs were significantly higher in patients with the B1 allele of Taq1B RFLP than in those without it, while the Taq1A RFLP and -141C Ins/Del polymorphisms were not significantly related to the maintenance doses. In conclusion, the risk of EPS may be increased in patients with the -141C Del allele of the DRD2 gene. In these patients, antipsychotics should be administered with caution.
authors.affiliation: Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Nakazono
authors.forename: H
authors.initials: H
authors.lastname: Abe
authors.forename: H
authors.initials: H
authors.lastname: Murakami
authors.forename: N
authors.initials: N
authors.lastname: Koyabu
authors.forename: Y
authors.initials: Y
authors.lastname: Isaka
authors.forename: Y
authors.initials: Y
authors.lastname: Nemoto
authors.forename: S
authors.initials: S
authors.lastname: Murata
authors.forename: Y
authors.initials: Y
authors.lastname: Tsutsumi
authors.forename: H
authors.initials: H
authors.lastname: Ohtani
authors.forename: Y
authors.initials: Y
authors.lastname: Sawada
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014150:Antipsychotic Agents / Q000009:adverse effects*; D044466:Asian People / Q000235:genetics; D001480:Basal Ganglia Diseases / Q000139:chemically induced / Q000208:ethnology / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D017448:Receptors, Dopamine D2 / Q000235:genetics*; D012559:Schizophrenia / Q000188:drug therapy* / Q000235:genetics
chemical_list: D014150:Antipsychotic Agents; D017448:Receptors, Dopamine D2