title: [Relationship of polymorphism in CYP2C9 to genetic susceptibility to diclofenac-induced influenza-virus-associated encephalopathy].
abstract: The mechanism causing influenza-virus-associated encephalopathy is unclear, even though diclofenac metabolites may induce this pathogenesis. CYP2C9 is known as the major cytochrome P450 gene product that catalyzes diclofenac in human liver. It is uncertain whether the mutation of CYP2C9 is associated the pharmacologic effects of diclofenac in influenza infection. Therefore, we applied a simple and rapid procedure involving real-time fluorescence allele-specific PCR(TaqMan-ASA) assay and denaturing HPLC assay to detect the mutation of CYP2C9 gene. A single-base mutation in the CYP2C9 gene was found in one of thirty subjects in the healthy population. We suggest that this mutation in the CYP2C9 gene may be related to diclofenac-induced influenza-virus-associated encephalopathy.
authors.affiliation: Division of Molecular Diagnostics, Department of Clinical Medicine, Tohoku University, School of Medicine, Sendai 980-8574.
authors.forename: Tadao
authors.initials: T
authors.lastname: Funato
authors.forename: Kanoko
authors.initials: K
authors.lastname: Kozawa
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Kaku
mesh_terms: D001189:Aryl Hydrocarbon Hydroxylases; D065729:Cytochrome P-450 CYP2C9; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D004008:Diclofenac / Q000009:adverse effects*; D018792:Encephalitis, Viral / Q000209:etiology*; D020022:Genetic Predisposition to Disease; D006801:Humans; D007251:Influenza, Human / Q000209:etiology*; D020641:Polymorphism, Single Nucleotide; D039181:Steroid 16-alpha-Hydroxylase; D013250:Steroid Hydroxylases / Q000235:genetics*
chemical_list: D004008:Diclofenac; D003577:Cytochrome P-450 Enzyme System; D013250:Steroid Hydroxylases; C450260:CYP2C9 protein, human; D065729:Cytochrome P-450 CYP2C9; D001189:Aryl Hydrocarbon Hydroxylases; D039181:Steroid 16-alpha-Hydroxylase