Whole deletion of CYP2A6 gene (CYP2A6AST;4C) and smoking behavior.
The relationship between nicotine metabolism of CYP2A6 and the smoking behavior in a Japanese population was investigated. The CYP2A6 genotypes were determined by the PCR method. There was a significant difference in the frequency of the CYP2A6AST;4C allele, which is a whole deleted allele for the human CYP2A6 gene, between smokers and nonsmokers. The frequency of the CYP2A6AST;4C allele was higher in nonsmokers than in smokers, whereas the frequency of CYP2A6AST;1A/AST;1B heterozygotes with a higher activity of nicotine metabolism was lower. In this study it was suggested that the CYP2A6AST;4C allele may prevent the carrier from smoking and the CYP2A6AST;1A/AST;1B heterozygote may be at risk for developing smoking behavior.
Iwahashi
Kazuhiko
K
Department of Neurophysiology, Graduate School of Azabu University, Sagamihara, Japan. iwahashi@azabu-u.ac.jp
Waga
Chikako
C
Takimoto
Takahiro
T
D000328:Adult; D001189:Aryl Hydrocarbon Hydroxylases / Q000235:genetics*; D044466:Asian People / Q000235:genetics*; D016009:Chi-Square Distribution; D065637:Cytochrome P-450 CYP2A6; D004252:DNA Mutational Analysis; D005260:Female; D017353:Gene Deletion; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D006899:Mixed Function Oxygenases / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods; D012907:Smoking / Q000235:genetics*
D006899:Mixed Function Oxygenases; D001189:Aryl Hydrocarbon Hydroxylases; C585710:CYP2A6 protein, human; D065637:Cytochrome P-450 CYP2A6