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Title of Journal: J Nanopart Res

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Abbravation: Journal of Nanoparticle Research

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Springer Netherlands

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DOI

10.1002/mrc.1260270309

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ISSN

1572-896X

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Inflammatory responses of a human keratinocyte cel

Authors: V Bastos D Brown H Johnston A L DanieldaSilva I F Duarte C Santos H Oliveira
Publish Date: 2016/07/20
Volume: 18, Issue: 7, Pages: 205-
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Abstract

Silver nanoparticles AgNPs are among the most commonly used engineered NPs and various commercially available products are designed to come in direct contact with the skin wound dressings textiles creams among others Currently there is limited understanding of the influence of coatings on the toxicity of AgNPs and in particular their ability to impact on AgNP’s mediated inflammatory responses As AgNPs are often stabilized by different coatings including citrate and polyethyleneglycol PEG in this study we investigate the influence of citrate Cit10 or PEG PEG10 coatings to 10 nm AgNP on skin using human HaCaT keratinocytes AgNPs cytotoxicity and inflammatory response nuclear factor NFκB induction and cytokine production of HaCaT were assessed after in vitro exposure to 10 and 40 µg/mL after 4 24 and 48 h Results showed that although both types of coated AgNPs decreased cell proliferation and viability Cit10 AgNPs were more toxic NFκB inhibition was observed for the highest concentration 40 µg/mL of PEG10 AgNPs and the putative link to early apoptotic pathways observed in these cells is discussed No production of IL1β IL6 IL10 and TNFα was stimulated by AgNPs Furthermore Cit10 and PEG10 AgNPs decreased the release of MCP1 by HaCaT cells after 48 h of exposure As cytokines are vital for the immunologic regulation in the human body and it is demonstrated that they may interfere with NPs more research is needed to understand how different AgNPs affect the immune systemThis work was developed in the scope of the projects CICECOAveiro Institute of Materials Ref FCT UID/CTM/50011/2013 and CESAM Ref FCT UID/AMB/50017/2013 financed by national funds through the FCT/MEC and when applicable cofinanced by the European Regional Development Fund FEDER under the PT2020 Partnership Agreement Funding to the project FCOMP010124FEDER021456 Ref FCT PTDC/SAUTOX/120953/2010 by FEDER through COMPETE and by national funds through FCT and the FCTawarded grants SFRH/BD/81792/2011 SFRH/BPD/111736/2015 are acknowledged IFD and ALDS acknowledge FCT/MCTES for the research contracts under the Program ‘Investigador FCT’ 2014

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