Investigation on cobalt-oxide nanoparticles cyto-genotoxicity and inflammatory response in two types of respiratory cells

Journal of Applied Toxicology : JAT
Delia CavalloCinzia Lucia Ursini

Abstract

The increasing use of cobalt oxide (Co3 O4 ) nanoparticles (NPs) in several applications and the suggested genotoxic potential of Co-oxide highlight the importance of evaluating Co3 O4 NPs toxicity. Cyto-genotoxic and inflammatory effects induced by Co3 O4 NPs were investigated in human alveolar (A549), and bronchial (BEAS-2B) cells exposed to 1-40 µg ml(-1) . The physicochemical properties of tested NPs were analysed by transmission electron microscopy (TEM) and dynamic light scattering (DLS). Cytotoxicity was studied to analyze cell viability (WST1 test) and membrane damage (LDH assay), direct/oxidative DNA damage was assessed by the Formamido-pyrimidine glycosylase (Fpg)-modified comet assay and inflammation by interleukin (IL)-6, IL-8 and tumor necrosis factor-alpha (TNF-α) release (ELISA). In A549 cells, no cytotoxicity was found, whereas BEAS-2B cells showed a viability reduction at 40 µg ml(-1) and early membrane damage at 1, 5 and 40 µg ml-1. In A549 cells, direct and oxidative DNA damage at 20 and 40 µg ml(-1) were detected without any effects on cytokine release. In BEAS-2B cells, significant direct DNA damage at 40 µg ml(-1) and significant oxidative DNA damage with a peak at 5 µg ml(-1) , that was associated with in...Continue Reading

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Feb 5, 2016·Particle and Fibre Toxicology·Chiara UboldiVéronique Malard
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May 21, 2021·Environmental Science and Pollution Research International·Abhishek Sharan, Seema Nara

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