Arenobufagin, a compound in toad venom, blocks Na(+)-K+ pump current in cardiac myocytes.

Autor: Cruz Jdos S; Department of Physiology, Faculty of Medicine, Kyushu University, Fukuoka, Japan., Matsuda H
Jazyk: angličtina
Zdroj: European journal of pharmacology [Eur J Pharmacol] 1993 Aug 03; Vol. 239 (1-3), pp. 223-6.
DOI: 10.1016/0014-2999(93)90999-x
Abstrakt: The effects of arenobufagin, a bufadienolide isolated from toad venom, on the Na+/K+ pump were investigated by recording the whole-cell current of dissociated cardiac myocytes. Arenobufagin blocked the Na+/K+ pump current in a dose-dependent manner with a half-maximal concentration of 0.29 microM and a Hill coefficient of 1.1. Arenobufagin is 3.5-fold more potent than ouabain.
Databáze: MEDLINE