Toxicity of Cerium Oxide Nanoparticles in Human Lung Cancer Cells
With the fast development of nanotechnology, the nanomaterials start to cause people's attention for potential toxic effect. In this paper, the cytotoxicity and oxidative stress caused by 20-nm cerium oxide (CeO2) nanoparticles in cultured human lung cancer cells was investigated. The sulforhodamine B method was employed to assess cell viability after exposure to 3.5, 10.5, and 23.3 μg/ml of CeO2 nanoparticles for 24, 48, and 72 h. Cell viability decreased significantly as a function of nanoparticle dose and exposure time. Indicators of oxidative stress and cytotoxicity, including total reactive oxygen species, glutathione, malondialdehyde, α-tocopherol, and lactate dehydrogenase, were quantitatively assessed. It is concluded from the results that free radicals generated by exposure to 3.5 to 23.3 μg/ml CeO2 nanoparticles produce significant oxidative stress in the cells, as reflected by reduced glutathione and α-tocopherol levels; the toxic effects of CeO2 nanoparticles are dose dependent and time dependent; elevated oxidative stress increases the production of malondialdehyde and lactate dehydrogenase, which are indicators of lipid peroxidation and cell membrane damage, respectively.
W. Lin et al., "Toxicity of Cerium Oxide Nanoparticles in Human Lung Cancer Cells," International Journal of Toxicology, vol. 25, no. 6, pp. 451-457, SAGE Publications Inc., Sep 2006.
The definitive version is available at http://dx.doi.org/10.1080/10915810600959543
Materials Science and Engineering
Keywords and Phrases
Cerium Oxide (Ceo2); Cytotoxicity; Lung Cancer Cells (A549); Nanoparticles; Oxidative Stress; Alpha Tocopherol; Cerium; Free Radical; Glutathione; Lactate Dehydrogenase; Malonaldehyde; Reactive Oxygen Metabolite; Sulforhodamine B; Cancer Cell; Cell Membrane; Cell Viability; Controlled Study; Exposure; Human; Human Cell; Lipid Peroxidation; Materials; Membrane Damage; Nanotechnology; Quantitative Analysis; Alpha-Tocopherol; Cell Line, Tumor; Cell Membrane; Cell Survival; Cerium; Glutathione; Humans; L-Lactate Dehydrogenase; Lipid Peroxidation; Lung Neoplasms; Malondialdehyde; Reactive Oxygen Species
Library of Congress Subject Headings
International Standard Serial Number (ISSN)
Article - Journal
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