title: Lack of association between smoking and CYP2A6 gene polymorphisms in A Japanese population.
abstract: This study determined the genotypes of the CYP2A6 gene in 96 smokers and 141 non-smokers in a Japanese population. The frequencies of wild-type of the CYP2A6* 1 and those with a whole deletion of the CYP2A6 gene were 93 (96.9%) and 3 (3.1%) in 96 smokers, and 134 (95.0%) and 7 (5.0%) in non-smokers, respectively. In addition, neither the CYP2A6* 2 nor CYP2A6* 3 alleles were observed in the population studied. There were no significant differences in the CYP2A6 genotype frequencies between smokers and non-smokers, as well as in the number of cigarettes smoked and the nicotine amounts inhaled per day between the CYP2A6* 1 and the deletion of CYP2A6. These results suggest that either the deletion or non-deletion of the CYP2A6 gene shows no significant effect on smoking behavior for the Japanese population examined.
authors.affiliation: Department of Forensic Medicine, Kagawa Medical University, 1750-1, Ikenobe, Miki, Kita, Kagawa 761-0793, Japan.
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.forename: K
authors.initials: K
authors.lastname: Amemo
authors.forename: S
authors.initials: S
authors.lastname: Ameno
authors.forename: K
authors.initials: K
authors.lastname: Iwahashi
authors.forename: H
authors.initials: H
authors.lastname: Kinoshita
authors.forename: T
authors.initials: T
authors.lastname: Kubota
authors.forename: J
authors.initials: J
authors.lastname: Mostofa
authors.forename: I
authors.initials: I
authors.lastname: Ijiri
mesh_terms: D000328:Adult; D001189:Aryl Hydrocarbon Hydroxylases; D044466:Asian People; D065637:Cytochrome P-450 CYP2A6; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D006899:Mixed Function Oxygenases / Q000235:genetics*; D011110:Polymorphism, Genetic; D012907:Smoking / Q000235:genetics*
chemical_list: D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D001189:Aryl Hydrocarbon Hydroxylases; C585710:CYP2A6 protein, human; D065637:Cytochrome P-450 CYP2A6