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- W2103405659 startingPage "C852" @default.
- W2103405659 abstract "This study tested the hypothesis that the activity of the mitochondrial membrane permeability transition pore (PTP) affects the resting mitochondrial membrane potential (ΔΨ) of normal, healthy cells and that the anti-apoptotic gene product Bcl-2 inhibits the basal activity of the PTP. ΔΨ was measured by both fluorometric and nonfluorometric methods with SY5Y human neuroblastoma cells and with GT1–7 hypothalamic cells and PC12 pheochromocytoma cells in the absence and presence of Bcl-2 gene overexpression. The resting ΔΨ of Bcl-2 nonexpressing PC12 and wild-type SY5Y cells was increased significantly by the presence of the PTP inhibitor cyclosporin A (CsA) or by intracellular Ca 2+ chelation through exposure to the acetoxymethyl ester of 1,2-bis(2-aminophenoxy)ethane- N,N,N′,N′-tetraacetic acid (BAPTA-AM). The ΔΨ of Bcl-2-overexpressing PC12 cells was larger than that of Bcl-2-negative cells and not significantly increased by CsA or by Ca 2+ chelation. CsA did not present a significant effect on the ΔΨ monitored in unstressed GT1–7 cells but did inhibit the decrease in ΔΨ elicited by the addition of t-butyl hydroperoxide, an oxidative inducer of the mitochondrial permeability transition. These results support the hypothesis that an endogenous PTP activity can contribute to lowering the basal ΔΨ of some cells and that Bcl-2 can regulate the endogenous activity of the mitochondrial PTP." @default.
- W2103405659 created "2016-06-24" @default.
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- W2103405659 date "2000-09-01" @default.
- W2103405659 modified "2023-10-17" @default.
- W2103405659 title "Elevation of resting mitochondrial membrane potential of neural cells by cyclosporin A, BAPTA-AM, and Bcl-2" @default.
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- W2103405659 doi "https://doi.org/10.1152/ajpcell.2000.279.3.c852" @default.
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