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- W2014100516 abstract "Local Ca2+ transfer between adjoining domains of the sarcoendoplasmic reticulum (ER/SR) and mitochondria allows ER/SR Ca2+ release to activate mitochondrial Ca2+ uptake and to evoke a matrix [Ca2+] ([Ca2+]m) rise. [Ca2+]m exerts control on several steps of energy metabolism to synchronize ATP generation with cell function. However, calcium signal propagation to the mitochondria may also ignite a cell death program through opening of the permeability transition pore (PTP). This occurs when the Ca2+ release from the ER/SR is enhanced or is coincident with sensitization of the PTP. Recent studies have shown that several pro-apoptotic factors, including members of the Bcl-2 family proteins and reactive oxygen species (ROS) regulate the Ca2+ sensitivity of both the Ca2+ release channels in the ER and the PTP in the mitochondria. To test the relevance of the mitochondrial Ca2+ accumulation in various apoptotic paradigms, methods are available for buffering of [Ca2+], for dissipation of the driving force of the mitochondrial Ca2+ uptake and for inhibition of the mitochondrial Ca2+ transport mechanisms. However, in intact cells, the efficacy and the specificity of these approaches have to be established. Here we discuss mechanisms that recruit the mitochondrial calcium signal to a pro-apoptotic cascade and the approaches available for assessment of the relevance of the mitochondrial Ca2+ handling in apoptosis. We also present a systematic evaluation of the effect of ruthenium red and Ru360, two inhibitors of mitochondrial Ca2+ uptake on cytosolic [Ca2+] and [Ca2+]m in intact cultured cells." @default.
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- W2014100516 date "2006-11-01" @default.
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- W2014100516 title "Mitochondrial calcium signalling and cell death: Approaches for assessing the role of mitochondrial Ca2+ uptake in apoptosis" @default.
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- W2014100516 doi "https://doi.org/10.1016/j.ceca.2006.08.016" @default.
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