title: Genetic polymorphisms of CYP2E1 and risk of colorectal cancer: the Fukuoka Colorectal Cancer Study.
abstract: Cytochrome P450 2E1 (CYP2E1) is involved in the metabolic activation of a wide variety of potential carcinogens, and functional polymorphisms in the CYP2E1 gene have been investigated in relation to colorectal cancer. We examined the relation of the CYP2E1 RsaI and 96-bp insertion polymorphisms to colorectal cancer risk and the interaction between these polymorphisms and some lifestyle risk factors. Subjects were 685 incident cases of colorectal cancer and 778 community controls. Statistical adjustment was made for alcohol use, body mass index, physical activity, and other factors. The RsaI c2 allele was associated with a decreased risk of rectal cancer [adjusted odds ratio for at least one c2 allele, 0.71; 95% confidence interval (95% CI), 0.53-0.95], and an increased risk of rectal cancer was observed among individuals having one or two 96-bp insertion alleles (adjusted odds ratio, 1.40; 95% CI, 1.06-1.85). Individuals with two 96-bp insertion alleles showed a 2.28-fold increase in colon cancer risk (95% CI, 1.29-4.01). The two polymorphisms were in almost complete linkage disequilibrium (D' = 0.94). A positive association between alcohol intake and colorectal cancer was observed only in individuals without RsaI c2 allele (P(trend) = 0.03) or in those without 96-bp insertion allele (P(trend) = 0.009). Colon cancer risk was increased in relation to red meat intake only in individuals having one or two 96-bp insertion alleles (P(interaction) = 0.03). The present study suggests that variation in activity and inducibility of CYP2E1, in relation to alcohol or red meat intake, contributes to the development of colorectal cancer.
authors.affiliation: Department of Preventive Medicine, Graduate School of Medical Sciences, Kyushu University, Japan. mmorita@med.uoeh-u.ac.jp
authors.forename: Makiko
authors.initials: M
authors.lastname: Morita
authors.forename: Loïc
authors.initials: L
authors.lastname: Le Marchand
authors.forename: Suminori
authors.initials: S
authors.lastname: Kono
authors.forename: Guang
authors.initials: G
authors.lastname: Yin
authors.forename: Kengo
authors.initials: K
authors.lastname: Toyomura
authors.forename: Jun
authors.initials: J
authors.lastname: Nagano
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Mizoue
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Mibu
authors.forename: Masao
authors.initials: M
authors.lastname: Tanaka
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kakeji
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Maehara
authors.forename: Takeshi
authors.initials: T
authors.lastname: Okamura
authors.forename: Koji
authors.initials: K
authors.lastname: Ikejiri
authors.forename: Kitaroh
authors.initials: K
authors.lastname: Futami
authors.forename: Takafumi
authors.initials: T
authors.lastname: Maekawa
authors.forename: Yohichi
authors.initials: Y
authors.lastname: Yasunami
authors.forename: Kenji
authors.initials: K
authors.lastname: Takenaka
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Ichimiya
authors.forename: Nobutoshi
authors.initials: N
authors.lastname: Imaizumi
mesh_terms: D000428:Alcohol Drinking / Q000009:adverse effects; D000483:Alleles; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D015179:Colorectal Neoplasms / Q000453:epidemiology / Q000235:genetics*; D019392:Cytochrome P-450 CYP2E1 / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D015994:Incidence; D007407:Interviews as Topic; D007564:Japan / Q000453:epidemiology; D008019:Life Style; D016015:Logistic Models; D008297:Male; D008460:Meat / Q000009:adverse effects; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012307:Risk Factors; D018709:Statistics, Nonparametric
chemical_list: D019392:Cytochrome P-450 CYP2E1