Genotype analysis of the CYP2C19 gene in the Japanese population.
A polymorphic CYP2C19 gene was analyzed in 233 Japanese subjects, including 63 with Parkinson's disease, 92 with chronic liver diseases (35 chronic hepatitis, 19 liver cirrhosis, 16 hepatocellular carcinoma, 10 primary biliary cirrhosis and 12 autoimmune hepatitis), 14 with lung cancer (squamous cell carcinoma) and 64 healthy subjects to determine the genotype distributions of the CYP2C19 gene and to investigate its involvement in the diseases. Among Japanese healthy subjects 14.1% are predicted to be poor metabolizers (PM) of mephenytoin. The frequencies of the m1 and the m2 mutations of the CYP2C19 gene in the healthy subjects were 21.9% and 11.7%, respectively. Though the number of patients was small, patients with lung cancer (squamous cell carcinoma) are believed to have reduced enzyme activities of CYP2C19.
Tsuneoka
Y
Y
Department of Pharmacology, National Defense Medical College, Tokorozawa, Japan.
Fukushima
K
K
Matsuo
Y
Y
Ichikawa
Y
Y
Watanabe
Y
Y
D001189:Aryl Hydrocarbon Hydroxylases; D002294:Carcinoma, Squamous Cell / Q000201:enzymology / Q000235:genetics; D065731:Cytochrome P-450 CYP2C19; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D005838:Genotype; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D007564:Japan; D008107:Liver Diseases / Q000201:enzymology / Q000235:genetics; D008175:Lung Neoplasms / Q000201:enzymology / Q000235:genetics; D006899:Mixed Function Oxygenases / Q000235:genetics*; D010300:Parkinson Disease / Q000201:enzymology / Q000235:genetics; D011110:Polymorphism, Genetic
D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D001189:Aryl Hydrocarbon Hydroxylases; C045793:CYP2C19 protein, human; D065731:Cytochrome P-450 CYP2C19