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Urinary N-nitrosamino acids as indices of endogenous formation of N-nitroso compounds.

Exposure to their precursors (e.g., amines, nitrate/nitrite, NOx) can lead to formation in the human body of N-nitroso compounds (NOC), a class of potent animal carcinogens, which are also suspected of being carcinogenic in man. A non-invasive method, the 'N-nitrosoproline (NPRO) test', for estimating endogenous nitrosation in man was developed in our laboratory. This test, which monitors 24-hr-excretion of urinary N-nitrosamino acids, is now applied in clinical and field studies, with the aim of measuring nitrosamine exposure and of identifying dietary, life-style, and host factors, or disease states, that affect nitrosation in man. Results from such studies are used to identify populations/individuals at high risk for cancers of the stomach, oesophagus, and oral cavity possibly caused by endogenous nitrosamines, and to indicate preventive measures by which the body burden of endogenous nitroso carcinogens can be lowered efficiently.[1]

References

  1. Urinary N-nitrosamino acids as indices of endogenous formation of N-nitroso compounds. Ohshima, H., Pignatelli, B., Nair, J., Munoz, N., Calmels, S., Crespi, M., Lu, S.H., Bhide, S.V., Vincent, P., Leclerc, H. Basic Life Sci. (1986) [Pubmed]
 
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