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TiO2 nanoparticles tested in a novel screening whole human blood model of toxicity trigger adverse activation of the kallikrein system at low concentrations
Swedish Def Res Agcy, Linköping.
Uppsala University.
Uppsala University.
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för kemi och biomedicin (KOB). (Linnaeus Ctr Biomat Chem, BMC)
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2015 (Engelska)Ingår i: Biomaterials, ISSN 0142-9612, E-ISSN 1878-5905, Vol. 51, s. 58-68Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

There is a compelling need to understand and assess the toxicity of industrially produced nanoparticles (NPs). In order to appreciate the long-term effects of NPs, sensitive human-based screening tests that comprehensively map the NP properties are needed to detect possible toxic mechanisms. Animal models can only be used in a limited number of test applications and are subject to ethical concerns, and the interpretation of experiments in animals is also distorted by the species differences. Here, we present a novel easy-to-perform highly sensitive whole-blood model using fresh non-anticoagulated human blood, which most justly reflects complex biological cross talks in a human system. As a demonstrator of the tests versatility, we evaluated the toxicity of TiO2 NPs that are widely used in various applications and otherwise considered to have relatively low toxic properties. We show that TiO2 NPs at very low concentrations (50 ng/mL) induce strong activation of the contact system, which in this model elicits thromboinflammation. These data are in line with the finding of components of the contact system in the protein corona of the TiO2 NPs after exposure to blood. The contact system activation may lead to both thrombotic reactions and generation of bradykinin, thereby representing fuel for chronic inflammation in vivo and potentially long-term risk of autoimmunity, arteriosclerosis and cancer. These results support the notion that this novel whole-blood model represents an important contribution to testing of NP toxicity. (C) 2015 Elsevier Ltd. All rights reserved.

Ort, förlag, år, upplaga, sidor
2015. Vol. 51, s. 58-68
Nyckelord [en]
Contact system, P25, Platelets, Nanoparticles, Complement
Nationell ämneskategori
Materialkemi Biokemi och molekylärbiologi
Forskningsämne
Naturvetenskap, Biomedicinsk vetenskap
Identifikatorer
URN: urn:nbn:se:lnu:diva-42680DOI: 10.1016/j.biomaterials.2015.01.031ISI: 000351796700007PubMedID: 25770998Scopus ID: 2-s2.0-84924911596OAI: oai:DiVA.org:lnu-42680DiVA, id: diva2:806013
Tillgänglig från: 2015-04-17 Skapad: 2015-04-17 Senast uppdaterad: 2018-11-16Bibliografiskt granskad

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Sandholm, KerstinNilsson Ekdahl, Kristina

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Sandholm, KerstinNilsson Ekdahl, Kristina
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