Abstract
The balance of events involved in the activation/deactivation of xenobiotics is enormously complex. The metabolic activation of non-toxic chemicals to compounds that are reactive intermediates has been implicated in a wide variety of toxic reactions including carcinogenesis, teratogenesis, and toxicity (1–3). Figure 1 illustrates the enzymatic transformation of benzo[a]pyrene (BP) to reactive intermediates, primarily BP-epoxides. These electrophilic compounds can bind to DNA or to other cellular macromolecules to initiate toxicity. Toxic metabolites of polycyclic aromatic hydrocarbons can be enzymatically deactivated by a number of enzyme systems, such as the glutathione S-transferases, glucuronyltransferases, and sulfotransferases.
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Lamartiniere, C.A., Lucier, G.W. (1983). Endocrine Regulation of Xenobiotic Conjugation Enzymes. In: Langenbach, R., Nesnow, S., Rice, J.M. (eds) Organ and Species Specificity in Chemical Carcinogenesis. Basic Life Sciences. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-4400-1_16
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