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Glutathione S-transferase mu genotype, diet, and smoking as determinants of sister chromatid exchange frequency in lymphocytes. 1995

T J Cheng, and D C Christiani, and X Xu, and J C Wain, and J K Wiencke, and K T Kelsey
Department of Cancer Biology, Harvard School of Public Health Program, Boston, Massachusetts 02115, USA.

Polymorphisms in inherited metabolic traits and intake of dietary antioxidants have been reported to be associated with risk for the development of lung cancer in smokers. This increased risk of lung cancer is presumably attributable to the accumulation of DNA damage. We conducted a study to investigate whether genetic metabolic variants and antioxidant consumption affected the sister chromatid exchange (SCE) level in lymphocytes. Study subjects were 78 friends and spouses of cases from a case-control study of lung cancer designed to investigate the association of metabolic polymorphisms with lung cancer. The metabolic traits studied included glutathione S-transferase class mu and variants of P-450 isoenzymes CYP1A1 and CYP2D6. Intake of antioxidants including vitamins A, C, and E and selenium was determined through the administration of a validated, semiquantitative food frequency questionnaire. Detailed information on smoking, family history of cancer, medical history, and environmental and occupational exposures was also obtained in an interviewer-administered questionnaire. Smoking status was found to be significantly associated with SCE frequency. In addition SCE frequency decreased with the period of time since quitting smoking. The presence of one or more glutathione S-transferase class mu alleles was associated with significantly lower SCE. Higher intake of vitamin A and selenium was also inversely associated with SCE level. Thus, the results suggest that glutathione S-transferase class mu and the intake of vitamin A and selenium may modulate the accumulation of chromosomal damage in lymphocytes.

UI MeSH Term Description Entries
D008175 Lung Neoplasms Tumors or cancer of the LUNG. Cancer of Lung,Lung Cancer,Pulmonary Cancer,Pulmonary Neoplasms,Cancer of the Lung,Neoplasms, Lung,Neoplasms, Pulmonary,Cancer, Lung,Cancer, Pulmonary,Cancers, Lung,Cancers, Pulmonary,Lung Cancers,Lung Neoplasm,Neoplasm, Lung,Neoplasm, Pulmonary,Pulmonary Cancers,Pulmonary Neoplasm
D008214 Lymphocytes White blood cells formed in the body's lymphoid tissue. The nucleus is round or ovoid with coarse, irregularly clumped chromatin while the cytoplasm is typically pale blue with azurophilic (if any) granules. Most lymphocytes can be classified as either T or B (with subpopulations of each), or NATURAL KILLER CELLS. Lymphoid Cells,Cell, Lymphoid,Cells, Lymphoid,Lymphocyte,Lymphoid Cell
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D010375 Pedigree The record of descent or ancestry, particularly of a particular condition or trait, indicating individual family members, their relationships, and their status with respect to the trait or condition. Family Tree,Genealogical Tree,Genealogic Tree,Genetic Identity,Identity, Genetic,Family Trees,Genealogic Trees,Genealogical Trees,Genetic Identities,Identities, Genetic,Tree, Family,Tree, Genealogic,Tree, Genealogical,Trees, Family,Trees, Genealogic,Trees, Genealogical
D011795 Surveys and Questionnaires Collections of data obtained from voluntary subjects. The information usually takes the form of answers to questions, or suggestions. Community Survey,Nonrespondent,Questionnaire,Questionnaires,Respondent,Survey,Survey Method,Survey Methods,Surveys,Baseline Survey,Community Surveys,Methodology, Survey,Nonrespondents,Questionnaire Design,Randomized Response Technique,Repeated Rounds of Survey,Respondents,Survey Methodology,Baseline Surveys,Design, Questionnaire,Designs, Questionnaire,Methods, Survey,Questionnaire Designs,Questionnaires and Surveys,Randomized Response Techniques,Response Technique, Randomized,Response Techniques, Randomized,Survey, Baseline,Survey, Community,Surveys, Baseline,Surveys, Community,Techniques, Randomized Response
D004032 Diet Regular course of eating and drinking adopted by a person or animal. Diets
D005260 Female Females
D005838 Genotype The genetic constitution of the individual, comprising the ALLELES present at each GENETIC LOCUS. Genogroup,Genogroups,Genotypes

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