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Clinical Chemistry 27: 1516-1523, 1981;
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Clinical Chemistry, Vol 27, 1516-1523, Copyright © 1981 by American Association for Clinical Chemistry

Induction of O-deethylase activity as an index to exposure to coal- derived products and trace environmental pollutants

WD Bostick, J Kao, JM Holland and JE Mrochek

The metabolism of the synthetic substrate 7-ethoxyresorufin is a selective measure of the activity of cytochrome P-448 monooxygenase, the subset of cytochrome P-450-mediated enzymes preferentially induced by polycyclic aromatic hydrocarbons and related compounds. 7- Ethoxycoumarin metabolism, on the other hand, reflects total (nonselective) cytochrome P-450 monooxygenase activity. Either substrate yields a single, highly fluorescent product, amenable to direct, sensitive assay with the portable centrifugal analyzer. We used three assays with liver microsomes from C57/BL6 mice for the short-term bioassay of the dose-dependent effects of exposure to selected environmental toxins, including petroleums, polychlorinated biphenyls, and their oxidative degradation products.




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Copyright © 1981 by the American Association for Clinical Chemistry.