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- W2024006352 abstract "The status of glutathione (GSH) was studied in isolated rat liver mitochondria under conditions which induce a permeability transition. This transition, which is inhibited by cyclosporin A (CyA), requires the presence of Ca2+ and an inducing agent such as near physiological levels (3 mM) of inorganic phosphate (Pi). The transition is characterized by an increased inner membrane permeability to some low molecular weight solutes and by large amplitude swelling under some experimental conditions. Addition of 70 microM Ca2+ and 3 mM Pi to mitochondria resulted in mitochondrial swelling and extensive release of GSH that was recovered in the extramitochondrial medium as GSH. Both swelling and the efflux of mitochondrial GSH were prevented by CyA. Incubation of mitochondria in the presence of Ca2+, Pi, and GSH followed by addition of CyA provided a mechanism to load mitochondria with exogenous GSH that was greater than the rate of uptake by untreated mitochondria. Thus, GSH efflux from mitochondria may occur under toxicological and pathological conditions in which mitochondria are exposed to elevated Ca2+ in the presence of near physiological concentrations of Pi through a nonspecific pore. Cyclical opening and closing of the pore could also provide a mechanism for uptake of GSH by mitochondria." @default.
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- W2024006352 date "1991-10-01" @default.
- W2024006352 modified "2023-09-24" @default.
- W2024006352 title "Calcium- and phosphate-dependent release and loading of glutathione by liver mitochondria" @default.
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- W2024006352 doi "https://doi.org/10.1016/0003-9861(91)90590-f" @default.
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