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Possible mechanism for formation and regulation of the palmitate-induced cyclosporin A-insensitive mitochondrial poreстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 октября 2016 г.
- Авторы: Belosludtsev K.N., Belosludtseva N.V., Mironova G.D.
- Журнал: Biochemistry (Moscow)
- Том: 70
- Номер: 7
- Год издания: 2005
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 815
- Последняя страница: 821
- DOI: 10.1007/s10541-005-0189-x
- Аннотация: The mechanism of the palmitate-induced opening of the mitochondrial Ca2+-dependent cyclosporin A (CsA)insensitive pore was studied, as well as the influence on this process of well-known modulators of the CsA-sensitive Ca2+-dependent pore. Palmitic acid, which can bind Ca2+ with high affinity, induced the CsA-insensitive swelling of mitochondria, whereas palmitoleic and 2-bromopalmitic acids, which have no such affinity for Ca2+, failed to induce the pore opening. The palmitate-induced Ca2+-dependent swelling of mitochondria was not affected by a well-known inhibitor of the CsA-sensitive pore (ADP) and an activator of this pore (inorganic phosphate, P-i). However, this swelling was inhibited by physiological concentrations of ATP ([I](50) = 1.3 mM), but 100 mu M ATP increased by 30% the rate of mitochondria swelling if Ca2+ had been added earlier. The effects of ATP (inhibition and activation) manifested themselves from different sides of the inner mitochondrial membrane. Mg2+ inhibited the palmitate-induced Ca2+-dependent swelling of mitochondria with [I](50) = 0.8 mM. is concluded that palmitic acid induces the opening of the CsA-insensitive pore due to its ability for complexing with Ca2+. A possible mechanism of the pore formation and the influence of some modulators on this process are discussed.
- Добавил в систему: Белослудцев Константин Николаевич