title: Lifestyle, environmental, and genetic predictors of bulky DNA adducts in a study population nested within a prospective Danish cohort.
abstract: Bulky DNA adducts are considered a potential biomarker of cancer risk. In this study, the association between various lifestyle, environmental, and genetic factors and the levels of bulky DNA adducts in peripheral leukocytes was examined in a study group nested within a population-based prospective Danish cohort. At enrollment, blood samples were collected and information on lifestyle, including dietary and smoking habits, obtained. Previously, bulky DNA adducts were measured in 245 individuals who developed lung cancer and 255 control members of the cohort. Of these 500 individuals, data on 375 individuals were included in this study, excluding 125 cases, which developed lung cancer within the first 3 yr after blood sampling. Bulky DNA adduct levels were measured by 32P-postlabeling technique and polymorphisms in carcinogen metabolism and DNA repair genes were determined. Potential predictors of bulky DNA adduct levels were analyzed by univariate and multivariate regression analyses. Women tended to have higher adduct levels than men. Living in central Copenhagen and surface darkness of fried meat and fish were associated with quantitative higher adduct levels. No significant associations were found between dietary factors or smoking and DNA adduct levels. Further, the results showed no prominent associations between any of 12 genetic polymorphisms and adduct levels. Overall, our study showed only few associations between dietary, environmental, and genetic factors and levels of bulky DNA adducts measured in peripheral leukocytes in a general Danish population.
authors.affiliation: Danish Cancer Society, Institute of Cancer Epidemiology, Copenhagen, Denmark. kirsthor@cancer.dk
authors.forename: Kirsten Thorup
authors.initials: KT
authors.lastname: Eriksen
authors.forename: Mette
authors.initials: M
authors.lastname: Sørensen
authors.forename: Herman
authors.initials: H
authors.lastname: Autrup
authors.forename: Ulla
authors.initials: U
authors.lastname: Vogel
authors.forename: Kim
authors.initials: K
authors.lastname: Overvad
authors.forename: Anne
authors.initials: A
authors.lastname: Tjønneland
authors.forename: Steffen
authors.initials: S
authors.lastname: Loft
authors.forename: Ole
authors.initials: O
authors.lastname: Raaschou-Nielsen
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000235:genetics*; D018736:DNA Adducts; D003718:Denmark / Q000453:epidemiology; D004781:Environmental Exposure / Q000009:adverse effects*; D005260:Female; D005544:Forecasting; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007962:Leukocytes / Q000187:drug effects; D008019:Life Style; D008175:Lung Neoplasms / Q000097:blood / Q000453:epidemiology / Q000235:genetics*; D008297:Male; D015162:Micronucleus Tests; D008875:Middle Aged; D011110:Polymorphism, Genetic; D011446:Prospective Studies; D012307:Risk Factors; D011795:Surveys and Questionnaires
chemical_list: D014408:Biomarkers, Tumor; D018736:DNA Adducts