Interactions of Polyphenolic Compounds with Drug Disposition and Metabolism
Polyphenols are a heterogeneous class of compounds that include several hydrosoluble antioxidants useful in food preservation and claimed as health promoting agents. However, a number of studies in recent years have demonstrated that this class of compounds also contains powerful xenobiotics and cell stress inducers, which in turn elicit responses of defence and adaptation of the gastrointestinal tract and possibly of other organs. These responses investigated both in vitro and in vivo include the modulation of various groups of metabolic and stress genes, as well as effects on the expression and activity of detoxification systems, such as drug metabolising enzymes (DMEs), antioxidant and phase II enzymes, and transporter proteins. Such effects have been extensively interpreted as useful in that they can produce greater protection against xenobiotics and “cellular stresses” of endogenous and exogenous origin, and may indicate a mechanism for the preventive role that polyphenols are believed to play against the degenerative events of aging and chronic diseases. Conversely, these gene induction effects and the interaction with detoxification responses can have negative consequences by the generation of more reactive and harmful intermediates, and modified bioavailability and in vivo bioactivity of drugs, nutrients and the same polyphenols. This paper provides an overview of the recent literature on the mechanisms that govern biochemical and molecular responses to polyphenolic compounds relevant to drug metabolism, disposition and therapeutic efficacy.
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Document Type: Research Article
Publication date: December 1, 2007
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- Current Drug Metabolism aims to cover all the latest and outstanding developments in drug metabolism and disposition. The journal serves as an international forum for the publication of timely reviews in drug metabolism. Current Drug Metabolism is an essential journal for academic, clinical, government and pharmaceutical scientists who wish to be kept informed and up-to-date with the latest and most important developments. The journal covers the following areas:
In vitro systems including CYP-450; enzyme induction and inhibition; drug-drug interactions and enzyme kinetics; pharmacokinetics, toxicokinetics, species scaling and extrapolations; P-glycoprotein and transport carriers; target organ toxicity and interindividual variability; drug metabolism and disposition studies; extrahepatic metabolism; phase I and phase II metabolism; recent developments for the identification of drug metabolites and adducts.
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