Print Email Facebook Twitter Translocation of differently sized and charged polystyrene nanoparticles in in vitro intestinal cell models of increasing complexity Title Translocation of differently sized and charged polystyrene nanoparticles in in vitro intestinal cell models of increasing complexity Author Walczak, A.P. Kramer, E. Hendriksen, P.J.M. Tromp, P. Helsper, J.P.F.G. van der Zande, M. Rietjens, I.M.C.M. Bouwmeester, H. Publication year 2015 Abstract Intestinal translocation is a key factor for determining bioavailability of nanoparticles (NPs) after oral uptake. Therefore, we evaluated three in vitro intestinal cell models of increasing complexity which might affect the translocation of NPs: a mono-culture (Caco-2 cells), a co-culture with mucus secreting HT29-MTX cells and a tri-culture with M-cells. Cell models were exposed to well characterized differently sized (50 and 100nm) and charged (neutral, positively and negatively) polystyrene NPs. In addition, two types of negatively charged NPs with different surface chemistries were used. Size strongly affected the translocation of NPs, ranging up to 7.8% for the 50nm NPs and 0.8% for the 100nm NPs. Surface charge of NPs affected the translocation, however, surface chemistry seems more important, as the two types of negatively charged 50nm NPs had an over 30-fold difference in translocation. Compared with the Caco-2 mono-culture, presence of mucus significantly reduced the translocation of neutral 50nm NPs, but significantly increased the translocation of one type of negatively charged NPs. Incorporation of M-cells shifted the translocation rates for both NPs closer to those in the mono-culture model. The relative pattern of NP translocation in all three models was similar, but the absolute amounts of translocated NPs differed per model. We conclude that for comparing the relative translocation of different NPs, using one intestinal model is sufficient. To choose the most representative model for risk assessment, in vivo experiments are now needed to determine the in vivo translocation rates of the used NPs. © 2014 Informa UK Ltd. All rights reserved: reproduction in whole or part not permitted. Subject Urban Mobility & EnvironmentAEC - Applied Environmental ChemistryELSS - Earth, Life and Social SciencesSustainable Chemical IndustryEnvironmentIndustrial Innovation3Rs principleCharacterizationMucusProtein coronaSurface properties To reference this document use: http://resolver.tudelft.nl/uuid:9a9dc7f8-3fdb-493f-827f-3753e209281a DOI https://doi.org/10.3109/17435390.2014.944599 TNO identifier 526109 Publisher Informa Healthcare ISSN 1743-5390 Source Nanotoxicology, 9 (4), 453-461 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.