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Influence of Diabetes on the Pharmacokinetic Behavior of Natural Polyphenols

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The development of food fortified with polyphenols and polyphenol-rich foods represents a novel approach to prevent or attenuate type 2 diabetes. It has been reported that type 2 diabetes may affect the pharmacokinetics of various drugs in several animal models. There is powerful evidence linking dietary polyphenols consumption with the risk factors defining type 2 diabetes, even if some opposite results occurred. This mini-review summarizes important advances on diabetes-associated changes in pharmacokinetics of natural polyphenols. The pharmacokinetic behavior between drugs and dietary polyphenols probably may be different due to (i) Ingested dose/amount per day. The dietary polyphenol intake per day is much higher than that of clinical drugs; (ii) Complexity of the components. Clinical drugs are well-characterized and typically small molecules. However, the polyphenols in diet are unimaginably complex; (iii) Interaction with food proteins. Although the effects of food proteins on the bioavailability of polyphenols are still not examined in much detail, direct binding interactions of polyphenols to proteins always occur; (iv) The most common polyphenols in the human diet have a low intrinsic activity and are poorly absorbed from the intestine, highly metabolized, or rapidly eliminated. Although there is very limited information available so far, it is proposed that type 2 diabetes influences the pharmacokinetic behavior of dietary polyphenols including: i) competition of glucose with polyphenols regarding binding to plasma proteins; ii) weakened non-covalent interaction affinities of plasma proteins for natural polyphenols due to protein glycation in type II diabetes; iii) the enhanced clearance of polyphenols in type 2 diabetes. An understanding of diabetes-associated changes in absorption, distribution, metabolism, elimination and bioactivities of natural polyphenols as well as the mechanism of the variability should lead to the improvement of the benefits of these polyphenols and clinical outcomes for diabetics.
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Keywords: Metabolism; pharmacokinetic; polyphenols; type 2 diabetes

Document Type: Research Article

Publication date: January 1, 2014

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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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