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American Journal of Epidemiology Vol. 121, No. 5: 737-743
Copyright © 1985 by The Johns Hopkins University School of Hygiene and Public Health

ORIGINAL CONTRIBUTIONS

N-NFrROSO COMPOUNDS AND HUMAN CANCER

A MOLECULAR EPIDEMIOLOGIC APPROACH

BERNARD C. K. CHOI1

1 Occupational and Environmental Health Unit, Faculty of Medicine, University of Toronto Fitz Gerald Building, 150 College Street, Toronto, Ontario, Canada M5S 1A1

(Reprint requests to Dr. Choi.)

Received for publication August 15, 1983. Revision received May 29, 1984. N-Nltroso compounds are known to be potent animal carcinogens. However, evidence of their effect on human cancers is inconclusive, and further investi gations are needed. A mathematical model to create indices of nitrate, nitrite, and N-nltrosamine exposures, both exogenous and endogenous, is described In this paper. Estimation of the endogenous formation is based on the current knowledge of biochemistry and chemical kinetics of these compounds. The model can be applied to analyze data regarding the dietary history and use of tobacco products and alcoholic beverages obtained from epidemiologic questionnaires. Exposure levels of study and control subjects to these compounds can then be compared by conventional epidemiologic methods. This Is an approach toward the combination of conventional e methods and laboratory findings to study disease etiology.

cancer molecular models; nitroso compounds


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