title: CYP2D6 gene deletion allele in patients with neuroleptic malignant syndrome: preliminary report.
abstract: Neuroleptic malignant syndrome (NMS) is a potentially fatal adverse reaction to psychopharmacologic treatment. Reported herein are two NMS patients with schizophrenia who were found to possess a CYP2D6 gene deletion allele (CYP2D6*5). The deletion results in decreased CYP2D6 activity, possibly leading to drug accumulation. Both patients with NMS had been treated with neuroleptics, including CYP2D6 substrates. Polymerase chain reaction (PCR) followed by restriction fragment length polymorphism analyses and long PCR were performed to detect CYP2D6 genotype. One patient was found to possess *5/*10; the other had a *1/*5 genotype. The present preliminary report suggests that pharmacokinetic factors cannot be excluded and the CYP2D6 polymorphism is possibly associated with the etiology of NMS.
authors.affiliation: Department of Psychiatry, Yokohama City University School of Medicine, Yokohama, Japan.
authors.forename: Daiji
authors.initials: D
authors.lastname: Kato
authors.forename: Chiaki
authors.initials: C
authors.lastname: Kawanishi
authors.forename: Ikuko
authors.initials: I
authors.lastname: Kishida
authors.forename: Taku
authors.initials: T
authors.lastname: Furuno
authors.forename: Takehiko
authors.initials: T
authors.lastname: Matsumura
authors.forename: Hana
authors.initials: H
authors.lastname: Hasegawa
authors.forename: Kyoko
authors.initials: K
authors.lastname: Suzuki
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Hirayasu
mesh_terms: D000328:Adult; D000483:Alleles; D014150:Antipsychotic Agents / Q000009:adverse effects* / Q000627:therapeutic use; D019389:Cytochrome P-450 CYP2D6 / Q000235:genetics*; D004247:DNA / Q000235:genetics; D005260:Female; D017353:Gene Deletion; D006801:Humans; D008297:Male; D008875:Middle Aged; D009459:Neuroleptic Malignant Syndrome / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012559:Schizophrenia / Q000150:complications / Q000188:drug therapy
chemical_list: D014150:Antipsychotic Agents; D004247:DNA; D019389:Cytochrome P-450 CYP2D6