title: Asbestos exposure, manganese superoxide dismutase (MnSOD) genotype, and lung cancer risk.
abstract: To assess whether differences in genetic susceptibility to oxidative stress modify asbestos-related lung cancer risk (caused by lung inflammation, free radical production), we examined possible interactions between manganese superoxide dismutase (MnSOD) genotypes and asbestos in a hospital-based case-control study of 811 white lung cancer cases and 957 friend/spouse controls. Cumulative lifetime asbestos exposure score (AES) was calculated from self-reported duration and intensity of occupational and nonoccupational exposures. A total of 13.5% of cases and 10% of controls had "high" AES (determined by a priori cut point). The homozygous variant MnSOD genotype was associated with increased lung cancer risk among individuals with zero or "low" AES (odds ratio [OR], 2.14; 95% confidence interval [CI], 1.52-3.01) and no association (OR = 1.00; 95% CI = 0.36-2.73) among the "high" AES group. We observed no statistically significant interaction between MnSOD genotype and asbestos exposure for lung cancer risk.
authors.affiliation: Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts 02115, USA.
authors.forename: Lisa I
authors.initials: LI
authors.lastname: Wang
authors.forename: Donna
authors.initials: D
authors.lastname: Neuberg
authors.forename: David C
authors.initials: DC
authors.lastname: Christiani
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D001194:Asbestos / Q000633:toxicity*; D016022:Case-Control Studies; D004781:Environmental Exposure / Q000009:adverse effects*; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D016015:Logistic Models; D008175:Lung Neoplasms / Q000139:chemically induced / Q000235:genetics*; D008297:Male; D008404:Massachusetts; D008875:Middle Aged; D016273:Occupational Exposure / Q000009:adverse effects; D018384:Oxidative Stress / Q000235:genetics; D011110:Polymorphism, Genetic; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects; D013482:Superoxide Dismutase / Q000235:genetics*; D011795:Surveys and Questionnaires
chemical_list: D001194:Asbestos; D013482:Superoxide Dismutase