[The role of Na(+) pump inhibition induced by Ca2(+) ions in the development of pathologic changes during calcium overload in myocardial cells]

Autor: A, Breier, V, Durisová, R, Monosíková, T, Stankovicová, A, Vrbanová, V, Zúbor
Rok vydání: 1990
Předmět:
Zdroj: Bratislavske lekarske listy. 91(3)
ISSN: 0006-9248
Popis: Ca2+ ions cause marked inhibition of (Na+ + K+)-ATPase. Strontium and barium ions exert a less pronounced inhibition of (Na+ + K+)-ATPase activity. These findings suggest the existence of a regulatory binding site for calcium ions on the (Na+ + K+)-ATPase molecule. Under physiological conditions, this binding site is presumably involved in stopping the activity of (Na+ + K+)-ATPase during depolarization of the sarcolemma. In pathological conditions which are characterized by calcium overload of cardiomyocytes inhibition of (Na+ + K+)-ATPase by calcium ions can significantly contribute to massive damage of myocardial cells. (Fig. 3, Ref. 26.).
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