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Dermatokinetics as an Important Tool to Assess the Bioavailability of Drugs by Topical Nanocarriers

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Background: Now-a-days, numerous nanocarrier-based drug products for topical applications are present in the market and number of similar products are being researched. To estimate the amount of drug delivery to skin, the scientists have now established techniques for separation of skin layers for the determination of drug concentrations. This forms the basis of pharmacokinetics of drug(s) in skin, i.e., dermatokinetics. However, dermatokinetic modeling of topical products is still a colossal challenge. Assessment of bioavailability helps in determination of safety and efficacy of topical formulations.

Objective: This article is an attempt to explore the usefulness and methodologies of dermatokinetics for nanocarriermediated topical delivery. It also showcases challenges in methodologies used for determination of dermatokinetic parameters along with advantages.

Method: All the articles (research and review) used for writing the manuscript were collected from various search engines like Science Direct, Google Scholar, PubMed and Eureka Select using keywords like dermatokinetics, novel drug delivery systems, bioequivalence, bioavailability and topical delivery.

Conclusion: As the methods used for determination of pharmacokinetics of oral and intravenous formulations are not useful for dermatokinetic assessment, various methods like tape stripping, microdialysis and vasoconstrictor assays are being used for dermatokinetic assessment. These methods are not only useful to determine the drug concentrations in skin layers, but can also be used to correlate the toxic effects of xenobiotics.
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Keywords: Pharmacokinetics; confocal microscopy; follicular drug penetration; micro dialysis; tape stripping; trypsin digestion; vasoconstrictor assay

Document Type: Research Article

Publication date: May 1, 2017

More about this publication?
  • 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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