Cytotoxic and proinflammatory effects of PVP-coated silver nanoparticles after intratracheal instillation in rats

Silver nanoparticles (AgNP) are among the most promising nanomaterials, and their usage in medical applications and consumer products is growing rapidly. To evaluate possible adverse health effects, especially to the lungs, the current study focused on the cytotoxic and proinflammatory effects of Ag...

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Published in:Beilstein journal of nanotechnology 2013-12, Vol.4 (1), p.933-940
Main Authors: Haberl, Nadine, Hirn, Stephanie, Wenk, Alexander, Diendorf, Jörg, Epple, Matthias, Johnston, Blair D, Krombach, Fritz, Kreyling, Wolfgang G, Schleh, Carsten
Format: Article
Language:English
Subjects:
cytotoxicity
Full Research Paper
inflammation
Nanoscience
Nanotechnology
pulmonary toxicity
silver nanoparticles
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Summary:Silver nanoparticles (AgNP) are among the most promising nanomaterials, and their usage in medical applications and consumer products is growing rapidly. To evaluate possible adverse health effects, especially to the lungs, the current study focused on the cytotoxic and proinflammatory effects of AgNP after the intratracheal instillation in rats. Monodisperse, PVP-coated AgNP (70 nm) showing little agglomeration in aqueous suspension were instilled intratracheally. After 24 hours, the lungs were lavaged, and lactate dehydrogenase (LDH), total protein, and cytokine levels as well as total and differential cell counts were measured in the bronchoalveolar lavage fluid (BALF). Instillation of 50 µg PVP-AgNP did not result in elevated LDH, total protein, or cytokine levels in BALF compared to the control, whereas instillation of 250 µg PVP-AgNP caused a significant increase in LDH (1.9-fold) and total protein (1.3-fold) levels as well as in neutrophil numbers (60-fold) of BALF. Furthermore, while there was no change in BALF cytokine levels after the instillation of 50 µg PVP-AgNP, instillation of 250 µg PVP-AgNP resulted in significantly increased levels of seven out of eleven measured cytokines. These finding suggest that exposure to inhaled AgNP can induce moderate pulmonary toxicity, but only at rather high concentrations.
ISSN:2190-4286
2190-4286
DOI:10.3762/bjnano.4.105