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dc.contributor.authorKletting, Stephanie
dc.contributor.authorBarthold, Sarah
dc.contributor.authorRepnik, Urska
dc.contributor.authorGriffiths, Gareth
dc.contributor.authorLoretz, Brigitta
dc.contributor.authorSchneider-Daum, Nicole
dc.contributor.authorde Souza Carvalho-Wodarz, Cristiane
dc.contributor.authorLehr, Claus-Michael
dc.date.accessioned2019-05-14T10:33:37Z
dc.date.available2019-05-14T10:33:37Z
dc.date.issued2018-01-01
dc.identifier.citationALTEX. 2018;35(2):211-222. doi: 10.14573/altex.1607191. Epub 2017 Nov 23.en_US
dc.identifier.issn1868-596X
dc.identifier.pmid29169185
dc.identifier.doi10.14573/altex.1607191
dc.identifier.urihttp://hdl.handle.net/10033/621773
dc.description.abstractThe air-blood barrier is mainly composed of alveolar epithelial cells and macrophages. Whereas the epithelium acts as a diffusional barrier, macrophages represent an immunological barrier, in particular for larger molecules and nanoparticles. This paper describes a new co-culture of human cell lines representing both cell types. Acquiring, culturing and maintaining primary alveolar epithelial cells presents significant logistical and technical difficulties. The recently established human alveolar epithelial lentivirus immortalized cell line, hAELVi, when grown on permeable filters, forms monolayers with high functional and morphological resemblance to alveolar type I cells. To model alveolar macrophages, the human cell line THP-1 was seeded on pre-formed hAELVi monolayers. The co-culture was characterized regarding cellular morphology, viability and barrier function. Macrophages were homogenously distributed on the epithelium and could be kept in co-culture for up to 7 days. Transmission electron microscopy showed loose contact between THP-1 and hAELVi cells. When grown at air liquid interface, both cells were covered with extracellular matrix-like structure, which was absent in THP-1 mono-culture. In co-culture with macrophages, hAELVi cells displayed similar, sometimes even higher, transepithelial electrical resistance than in mono-cultures. When exposed to silver and starch nanoparticles, hAELVi mono-cultures were more tolerant to the particles than THP-1 mono-cultures. Viability in the co-culture was similar to that of hAELVi mono-cultures. Transport studies with sodium fluorescein in the presence/absence of EDTA proved that the co-culture acts as functional diffusion barrier. These data demonstrate that hAELVi-/THP-1 co-cultures represent a promising model for safety and permeability studies of inhaled chemicals, drugs and nanoparticles.en_US
dc.language.isoenen_US
dc.publisherSpringer Natureen_US
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/*
dc.subjectIn vitro modelen_US
dc.subjectair-blood barrieren_US
dc.subjectnanoparticlesen_US
dc.subjectnanotoxicologyen_US
dc.subjectpulmonary drug deliveryen_US
dc.titleCo-culture of human alveolar epithelial (hAELVi) and macrophage (THP-1) cell lines.en_US
dc.typeArticleen_US
dc.contributor.departmentHIPS, Helmholtz-Institut für Pharmazeutische Forschung Saarland, Universitätscampus E8.1 66123 Saarbrücken, Germany.en_US
dc.identifier.journalALTEXen_US
refterms.dateFOA2019-05-14T10:33:38Z
dc.source.journaltitleALTEX


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