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- W2000202312 abstract "Nanomaterials improve everyday products but their safety for human health is poorly known. In this study we explored immunological effects of five different nanomaterials on antigen presenting cells (APC) in vitro. Nanomaterials studied were rutile titanium dioxide (TiO2), amorphous silica-coated rutile titanium dioxide (TiO2-silica), zinc oxide (ZnO), single-walled carbon nanotubes (SWCNT) and multi-walled carbon nanotubes (MWCNT). APCs included mouse macrophages (RAW 264.7 cell line) and murine bone marrow-derived dendritic cells (bmDC). All studied particles were cytotoxic to bmDCs, and ZnO, TiO2 and TiO2-silica-induced dose-dependently cell death also in macrophages. ZnO had the most drastic immunological effects leading to high expression of proinflammatory cytokine, IL-1β, and enhanced production of neutrophil chemoattractant CXCL-9 on both cell types. TiO2 and TiO2-silica stimulated the expression of IL-6, MIP-1α and TNF-α in macrophages, and increased their maturation, antigen presentation and co-stimulation activity. In contrast, SWCNT or MWCNT did not seem to have any significant immunological effects on the cell types studied suggesting that APCs might not be the target cells for carbon nanotubes. Due to diverse effects on different nanomaterials on immune cells we suggest that each new nanomaterial should be extensively studied in vitro and in vivo for risk assessment before their use in final products." @default.
- W2000202312 created "2016-06-24" @default.
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- W2000202312 date "2010-01-01" @default.
- W2000202312 modified "2023-10-17" @default.
- W2000202312 title "Engineered nanomaterials cause cytotoxicity and activation on mouse antigen presenting cells" @default.
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- W2000202312 doi "https://doi.org/10.1016/j.tox.2009.10.034" @default.
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