Abstract
A recent report has described that S-15176 (N-[(3,5-di-tert-butyl-4-hydroxy-1-thiophenyl)]-3-propyl-N′-(2,3,4-trimethoxybenzyl) piperazine), an anti-ischemic agent, inhibits the mitochondrial permeability transition (PT) induced by not only Ca2+ and inorganic phosphate, but also by tert-butylhydroperoxide or phenylarsine oxide [Morin et al. (Biochem Pharmacol 72:911–918, 2006)]. In the present study, we tested the effects of S-15176 on the PT induced by Ag+, PT of which is not suppressed by cyclosporin A or oligomycin. S-15176 was effective in suppressing the PT and the subsequent cytochrome c release induced by Ag+, and hence, it was concluded to be a more universal PT inhibitor than cyclosporin A or oligomycin. In addition to the PT-suppression activity, S-15176 also showed weak protonophoric activity. Thus, we further tested to investigate whether the hydroxyl group of S-15176 was involved in its PT-suppression or weak protonophoric activities. The methylated derivative of S-15176 also showed both PT suppression and weak protonophoric activities; hence, the hydroxyl group of S-15176 was concluded not to be involved in these activities.
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Abbreviations
- CsA:
-
Cyclosporin A
- PT:
-
Permeability transition
- VDAC:
-
Voltage-dependent anion channel
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Satoshi Kawashima, and Takenori Yamamoto contributed equally to this study.
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Kawashima, S., Yamamoto, T., Horiuchi, Y. et al. S-15176 and its methylated derivative suppress the CsA-insensitive mitochondrial permeability transition and subsequent cytochrome c release induced by silver ion, and show weak protonophoric activity. Mol Cell Biochem 358, 45–51 (2011). https://doi.org/10.1007/s11010-011-0919-x
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DOI: https://doi.org/10.1007/s11010-011-0919-x