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• W2005301871 startingPage "328" @default.
• W2005301871 abstract "Inorganic arsenicals are environmental toxins that have been connected with neuropathies and impaired cognitive functions. To investigate whether such substances accumulate in brain astrocytes and affect their viability and glutathione metabolism, we have exposed cultured primary astrocytes to arsenite or arsenate. Both arsenicals compromised the cell viability of astrocytes in a time- and concentration-dependent manner. However, the early onset of cell toxicity in arsenite-treated astrocytes revealed the higher toxic potential of arsenite compared with arsenate. The concentrations of arsenite and arsenate that caused within 24h half-maximal release of the cytosolic enzyme lactate dehydrogenase were around 0.3mM and 10mM, respectively. The cellular arsenic contents of astrocytes increased rapidly upon exposure to arsenite or arsenate and reached after 4h of incubation almost constant steady state levels. These levels were about 3-times higher in astrocytes that had been exposed to a given concentration of arsenite compared with the respective arsenate condition. Analysis of the intracellular arsenic species revealed that almost exclusively arsenite was present in viable astrocytes that had been exposed to either arsenate or arsenite. The emerging toxicity of arsenite 4h after exposure was accompanied by a loss in cellular total glutathione and by an increase in the cellular glutathione disulfide content. These data suggest that the high arsenite content of astrocytes that had been exposed to inorganic arsenicals causes an increase in the ratio of glutathione disulfide to glutathione which contributes to the toxic potential of these substances." @default.
• W2005301871 created "2016-06-24" @default.
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• W2005301871 date "2014-07-01" @default.
• W2005301871 modified "2023-09-25" @default.
• W2005301871 title "Uptake and toxicity of arsenite and arsenate in cultured brain astrocytes" @default.
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• W2005301871 doi "https://doi.org/10.1016/j.jtemb.2014.04.007" @default.
• W2005301871 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24894442" @default.
• W2005301871 hasPublicationYear "2014" @default.
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