Title: Cytokine production by co-cultures exposed to monodisperse amorphous silica nanoparticles: The role of size and surface area
Authors: Napierska, Dorota ×
Thomassen, Leen
Vanaudenaerde, Bart
Luyts, Katrien
Lison, Dominique
Martens, Johan
Nemery, Benoit
Hoet, Peter #
Issue Date: Jun-2012
Publisher: Elsevier/North-Holland
Series Title: Toxicology Letters vol:211 issue:2 pages:98-104
Abstract: The aim of this study was to test the influence of nanoparticle size and surface area (SA) on cytokine secretion by co-cultures of pulmonary epithelial cells (A549), macrophages (differentiated THP-1 cells) and endothelium cells (EA.hy926) in a two-compartment system. We used monodisperse amorphous silica nanoparticles (2, 16, 60 and 104nm) at concentrations of 5μg/cm(2) cell culture SA or 10cm(2) particle SA/cm(2). A549 and THP-1 cells were exposed to nanoparticles for 24h, in the presence of EA.hy926 cells cultured in an insert introduced above the bi-culture after 12h. Supernatants from both compartments were recovered and TNF-α, IL-6, IL-8 and MIP-1α were measured. Significant secretion of all cytokines was observed for the 2nm particles at both concentrations and in both compartments. Larger particles of 60nm induced significant cytokine secretion at the dose of 10cm(2) particle SA/cm(2). The use of multiple cellular types showed that cytokine secretion in single cell cultures is amplified or mitigated in co-cultures. The release of pro-inflammatory mediators by endothelial cells not directly exposed to nanoparticles indicates a possible endothelium activation after inhalation of silica particles. This work shows the role of size and SA in cellular response to amorphous nanosilica.
ISSN: 0378-4274
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Pneumology
Occupational, Environmental and Insurance Medicine (-)
Centre for Surface Chemistry and Catalysis
Formerly "Departement Industriƫle Wetenschappen - TM M"
Environment and Health - miscellaneous
Microbial and Molecular Systems - miscellaneous
Sustainable Chemical Process Technology TC, Technology Campus Diepenbeek
Sustainable Chemical Process Technology TC
× corresponding author
# (joint) last author

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