Size-Dependent Effect of Silver Nanoparticles on the Tumor Necrosis Factor α-Induced DNA Damage Response.

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2019
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Abstract
Silver nanoparticles (AgNPs) are widely used in many consumer products due to their anti-inflammatory properties. Therefore, the effect of exposure to AgNPs should be investigated in diseased states in addition to healthy ones. Tumor necrosis factor-α (TNFα) is a major cytokine that is highly expressed in many diseased conditions, such as inflammatory diseases, sepsis, and cancer. We investigated the effects of two different sizes of AgNPs on the TNFα-induced DNA damage response. Cells were exposed to 10 and 200 nm AgNPs separately and the results showed that the 200 nm AgNPs had a lower cytotoxic effect with a higher percent of cellular uptake compared to the 10 nm AgNPs. Moreover, analysis of reactive oxygen species (ROS) generation and DNA damage indicated that TNFα-induced ROS-mediated DNA damage was reduced by 200 nm AgNPs, but not by 10 nm AgNPs. Tumor necrosis factor receptor 1 (TNFR1) was localized on the cell surface after TNFα exposure with or without 10 nm AgNPs. In contrast, the expression of TNFR1 on the cell surface was reduced by the 200 nm AgNPs. These results suggested that exposure of cells to 200 nm AgNPs reduces the TNFα-induced DNA damage response via reducing the surface expression of TNFR1, thus reducing the signal transduction of TNFα.
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fehaid2019size-dependent Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Fehaid, Alaa;Taniguchi, Akiyoshi;
Journal International journal of molecular sciences
Year 2019
DOI
E1038
URL
Keywords
apoptosis mda-mb-231 cells mapk pathway fluoro-thiazolylhydrazone phosphorylated c-jun n-terminal kinase (p-jnk) phosphorylated p44/42 mapk (erk1/2) triple negative breast cancer interactions creativity hrm amo theory digital era

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