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CYP2D6ultrarapid metabolizer genotype as a potential modifier of smoking behaviour

 

作者: Sirkku Saarikoski,   Fumihiro Sata,   Kirsti Husgafvel-Pursiainen,   Matti Rautalahti,   Jari Haukka,   Olli Impivaara,   Jorma Järvisalo,   Harri Vainio,   Ari Hirvonen,  

 

期刊: Pharmacogenetics  (OVID Available online 2000)
卷期: Volume 10, issue 1  

页码: 5-10

 

ISSN:0960-314X

 

年代: 2000

 

出版商: OVID

 

关键词: CYP2D6;genotype;polymorphism;smoking

 

数据来源: OVID

 

摘要:

Some 3–10% of Caucasians are deficient in CYP2D6 metabolism (poor metabolizers), due to inheritance of two defective alleles, whereas amplification of theCYP2D6gene results in ultrarapid metabolism in 1–2% of Caucasian populations. To examine the possible association betweenCYP2D6polymorphism and individual smoking behaviour, we analysed the prevalence ofCYP2D6genotypes among 292 long-term heavy smokers, 382 individuals with more variable smoking histories, and 302 never-smokers. The prevalence of ultrarapid metabolizers in heavy smokers (7.9%) was twofold compared to individuals with variable smoking habits (3.7%; odds ratio 2.3, 95% confidence interval 1.2–4.4), and fourfold compared with never-smokers (2.0%) (odds ratio 4.2, 95% confidence interval 1.8–9.8). The frequency of poor metabolizer genotype was approximately 2%, in each smoker group. However, when men and women were studied separately, the prevalence of poor metabolizer genotype was higher in male never-smokers (3.6%) than in variable smokers (2.7%) and heavy smokers (2.2%). Moreover, a trend test, adjusted by age, gender and cancer status, revealed a significant trend for the increased tobacco usage with increased metabolic capacity. Our results are in agreement with the assumption that increased CYP2D6 activity may contribute to the probability of being addicted to smoking.

 

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