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- W2028490083 abstract "The effects of bufadienolides (bufalin, bufotalin, cinobufagin, cinobufotalin, gamabufotalin and resibufogenin) isolated from Toad Cake was compared to that of cardenolides (digitoxin and ouabain) on cardiac function in a guinea-pig working heart preparation. All the steroids showed the cardiotonic effect in a concentration-dependent manner, and the minimum threshold concentration was 10(-8) M for bufalin, cinobufagin, gamabufotalin and digitoxin and 10(-7) M for bufotalin, cinobufotalin and ouabain. In addition, the order of maximum efficacy of cardiotonic action was as follows: cinobufagin (3 X 10(-7) M) = ouabain (3 X 10(-7) M) greater than digitoxin (1 X 10(-7) M) = gamabufotalin (3 X 10(-7) M) greater than cinobufotalin (3 X 10(-7) M) greater than bufotalin (1 X 10(-7) M). The effect of cinobufagin was examined on experimentally induced heart failure caused by acute local ischemia through ligation of the left anterior descending coronary artery in perfused guinea-pig heart. Cinobufagin (3 X 10(-7) M) and digitoxin (1 X 10(-7) M) reestablished the coronary flow of perfused guinea-pig heart to 90% and 98% of the level prior to the coronary artery ligation. The cardiac output and left ventricular pressure of perfused heart were increased to the level prior to the acute local ischemia, and the left ventricular work was increased by cinobufagin (3 X 10(-7) M) and digitoxin (1 X 10(-7) M) to 108% and 106%, respectively, of the pre-ligation level. These results indicate that cinobufagin possesses strong cardiotonic action, similar, to digitoxin, in experimentally induced heart failure due to acute local ischemia." @default.
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- W2028490083 date "1986-01-01" @default.
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- W2028490083 title "The mode of cardiac action of cardiotonic steroids isolated from Toad Cake in perfused working guinea-pig heart and effect of cinobufagin on experimental heart failure." @default.
- W2028490083 doi "https://doi.org/10.1254/fpj.88.413" @default.
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