title: Life style and urinary 8-hydroxydeoxyguanosine, a marker of oxidative dna damage: effects of exercise, working conditions, meat intake, body mass index, and smoking.
abstract: The urinary levels of 8-hydroxydeoxyguanosine (8-OH-dG), a marker of oxidative DNA damage, of 318 healthy men aged 18 - 58 were measured with high resolution by a newly developed automated high-pressure liquid chromatography (HPLC) system coupled to an electrochemical detector (ECD). The mean 8-OH-dG level (mg / g creatinine) was 4.12 +/- 1.73 (SD). An eleven-fold inter-individual variation was observed. The accuracy of the measurement estimated from the recovery of an added 8-OH-dG standard was 90 - 98%. By univariate analysis, it was found that moderate physical exercise (P = 0.0023) and high body mass index (BMI) (P = 0.0032) reduced the 8-OH-dG level, while physical labor (P = 0.0097), smoking (P = 0.032), and low meat intake (less than once / week) (P = 0.041) increased its level. Based on a multi-regression analysis of the log-transformed values, moderate physical exercise (P = 0.0039), high BMI (P = 0.0099), and age (P = 0.021) showed significant reducing effects on the 8-OH-dG level, while low meat intake (P = 0.010), smoking (P = 0.013), and day-night shift work (P = 0.044) increased its level. These results suggest that many types of life-style factors that either generate or scavenge oxygen radicals may affect the level of oxidative DNA damage of each individual.
authors.affiliation: Department of Environmental Oncology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Yahatanishi-ku, Kitakyushu 807-8555, Japan. h-kasai@med.uoeh-u.ac.jp
authors.forename: H
authors.initials: H
authors.lastname: Kasai
authors.forename: N
authors.initials: N
authors.lastname: Iwamoto-Tanaka
authors.forename: T
authors.initials: T
authors.lastname: Miyamoto
authors.forename: K
authors.initials: K
authors.lastname: Kawanami
authors.forename: S
authors.initials: S
authors.lastname: Kawanami
authors.forename: R
authors.initials: R
authors.lastname: Kido
authors.forename: M
authors.initials: M
authors.lastname: Ikeda
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D015415:Biomarkers / Q000652:urine; D015992:Body Mass Index; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004249:DNA Damage; D003849:Deoxyguanosine / Q000031:analogs & derivatives* / Q000652:urine*; D015444:Exercise; D006801:Humans; D008019:Life Style; D008297:Male; D008460:Meat; D008875:Middle Aged; D010084:Oxidation-Reduction; D012907:Smoking / Q000652:urine; D014940:Work Schedule Tolerance
chemical_list: D015415:Biomarkers; D000080242:8-Hydroxy-2'-Deoxyguanosine; D003849:Deoxyguanosine