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Therapeutic Proteins and Nanotechnology: Immune Response and Stealth Bioengineered Constructs

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With unique potentials for organ drug delivery and targeting, intravenous administration of drugs has represented a key tool in biomedicine. A major concern of this route is the rapid capture and destruction of foreign substances by circulating immune cells. Knowledge about the inter-relationships between drugs and blood cells is essential for a better control in drug stability and bioavailability. In this review, both classical pathways and novel insights into the immune mechanisms leading to drug clearance after systemic delivery are described. Drug surface chemistry and size have been identified as critical factors for the activation of host immune responses, and their modification has been extensively explored in order to evade immune surveillance. Common strategies to camouflage drug surfaces through polymer-grafting are presented, with special emphasis on Poly(Ethylene Glycol) (PEG) linkages, one of the most diverse strategies for modifying biomolecular surfaces. Finally, the use of “smart shields”, such as PEG attachments shed at particular intracellular conditions, is briefly overviewed as an interesting approach for balancing circulation half lives VS bioavailability in polymer-grafted formulations.
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Keywords: Engineered nanoparticles; PEGylation; drug clearance; drug metabolism; immune response to nanoparticles; innate immunity; “smart” PEG-conjugates

Document Type: Research Article

Publication date: 01 June 2013

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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