Abstract
The effect of taurine on the ATP-dependent mitochondrial swelling that characterizes the activity of mitochondrial ATP-dependent K+ channel and the formation of Ca2+-dependent pores, different in sensitivity to cyclosporin A, has been studied in rat liver mitochondria. It has been shown that taurine in micromolar concentrations (0.5–125 μM) stimulates the energy-dependent swelling of mitochondria. Taurine in physiological concentrations (0.5–20 mM) has no effect on the ATP-dependent swelling and the formation of cyclosporin A-insensitive Pal/Ca2+-activated pore in mitochondria. Taurine in these concentrations increased the rate of cyclosporin A-sensitive swelling of mitochondria induced by Ca2+ and Pi and reduced the Ca2+ capacity of mitochondria. The different effects of physiological taurine concentrations on the ATP-dependent transport of K+ and Ca2+ ions in mitochondrial membranes as compared with cell membranes are discussed.
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Abbreviations
- MPT:
-
mitochondrial permeability transition pore
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Original Russian Text © S.V. Murzaeva, N.V. Belosludtseva, L. Gavrovskaya, G.D. Mironova, 2008, published in Biofizika, 2008, Vol. 53, No. 6, pp. 962–966.
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Murzaeva, S.V., Belosludtseva, N.V., Gavrovskaya, L. et al. The effect of taurine on the ion transport system in mitochondria. BIOPHYSICS 53, 515–518 (2008). https://doi.org/10.1134/S0006350908060080
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DOI: https://doi.org/10.1134/S0006350908060080