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• W2058087237 abstract "In a recent study, it was found that the intrastriatal administration to rats of the organophosphorous compound soman and kainic acid produced a rapid release not only of glutamate but also of dopamine in this brain region. Dopamine is a potent source of free radicals and is known to produce cytotoxic effects, per se. This raises the possibility that the released glutamate and dopamine act synergistically to produce the neurotoxicity found after soman administration. In order to investigate the feasibility of this hypothesis in an in vitro system, the effects of dopamine and glutamate upon cell survival were investigated using chick neurons (7 DIV) in serum-free primary culture. The neurons were treated with dopamine and/or glutamate for up to 24 h and cell toxicity was then assessed either by determination of cell densities, by the release of cytoplasmic LDH or by the MTT cytotoxicity assay. l-Glutamate produced a concentration-dependent cytotoxicity that was seen as early as after 30 min of exposure, and was accompanied by an increased level of lipid peroxidation. The l-glutamate toxicity could to a large extent be prevented by NMDA receptor antagonists and to a lesser extent by catalase, superoxide dismutase or glutathione ethyl ester added 30 min before the glutamate. Dopamine was also cytotoxic, and the cytotoxicity was reduced by the combination of catalase and glutathione ethyl ester but not by the MAO inhibitors clorgyline or l-deprenyl, or by the selective dopamine uptake inhibitor GBR 12783. The cytotoxic effects of dopamine and l-glutamate were additive rather than synergistic, regardless of the incubation time used. It is concluded that chick neurons in serum-free culture are a useful in vitro model system for the study of cell toxicity produced by oxidative stress and by glutamate. The cytotoxic effects of dopamine in this model are not due to the monoamine oxidase-mediated production of hydrogen peroxide but appear at least in part to be related to oxidative stress." @default.
• W2058087237 created "2016-06-24" @default.
• W2058087237 creator A5048926484 @default.
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• W2058087237 date "1999-01-01" @default.
• W2058087237 modified "2023-10-18" @default.
• W2058087237 title "Dopamine and glutamate neurotoxicity in cultured chick telencephali cells: effects of nmda antagonists, antioxidants and mao inhibitors" @default.
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• W2058087237 doi "https://doi.org/10.1016/s0197-0186(98)00069-2" @default.
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• W2058087237 hasPublicationYear "1999" @default.
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