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• W1999095877 abstract "The development of nanotechnology opens up new ways for biomedical applications of unmodified and modified diamond nanoparticles which are one of the most popular nanomaterials used in biology, biotechnology, medicine, cosmetics and engineering. They have been applied as diagnostic and therapeutic agents because they can be targeted to and localized in cells causing apoptosis and necrosis. The problem of biocompatibility of nanodiamonds at higher concentrations is thus of primary importance. The first step in the modification of DNPs is usually the introduction of hydrogen groups, which can bind other functional groups. The basic method to introduce -OH groups onto nanoparticles is the Fenton reaction. The aim of this study was to compare the effect of unmodified nanodiamond particles and nanoparticles modified by introduction of -OH groups and etoposide onto their surface reaction on human non-small lung cancer cells. A549 cells were incubated with 2-100μg/ml nanopowders and at 0.6-24μg/ml etoposide in the DMEM medium. We observed a decrease of cells viability and generation of reactive oxygen/ nitrogen species in the cells after incubation, estimated by oxidation of H2DCF-DA and DAF-FM-DA. Modified detonation nanoparticles affected also the cellular content of glutathione and activities of main antioxidant enzymes (glutathione peroxidase, glutathione reductase, glutathione S-transferase, superoxide dismutase and catalase). The results of TEM microscopy show changes in cell morphology. These data demonstrate that modified nanoparticles induce oxidative stress in the target cells." @default.
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• W1999095877 date "2014-10-01" @default.
• W1999095877 modified "2023-10-18" @default.
• W1999095877 title "Effect of functionalized and non-functionalized nanodiamond on the morphology and activities of antioxidant enzymes of lung epithelial cells (A549)" @default.
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• W1999095877 doi "https://doi.org/10.1016/j.cbi.2014.10.003" @default.
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