EFFECTS OF CYCLIC AMP AND DIBUTYRYL CYCLIC AMP ON THE HEART AND CORONARY CIRCULATION
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概要
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Using the canine heart-lung preparation supported by a donor dog and the isolated right and left atrial preparations of the guinea-pig and the rat, the cardiac actions of dibutyryl cyclic AMP were studied and compared with those of cyclic. AMP. Dibutyryl cyclic AMP produced positive isotropic and chronotropic effects associated with an increase in the coronary flow, while cyclic AMP produced negative isotropic and chronotropic effects, together with an increase in the coronary flow. Propranolol did not alter the effects of dibutyryl cyclic AMP. The negative isotropic and chronotropic effect of cyclic AMP was antagonized by aminophylline, while the positive isotropic and chronotropic effect of dibutyryl cyclic AMP vvas potentiated by this compound. Whereas the coronary flow increase by dibutyryl cyclic AMP seas associated with an increase in the myocardial oxygen consumption, there was no increase in the myocardial oxygen consumption after cyclic AMP. It is concluded that dibutyryl cyclic AMP passed the surface membrane and exerted its effect after having been converted to cyclic AMP within the cell. Cyclic AMP was presumed to remain outside the cell and produce its effect in the same way as adenine nucleotides and adenosine produce their effect.
- 社団法人 日本薬理学会の論文
著者
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IMAI Shoichi
Department of Pharmacology, Niigata University School of Medicine
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Imai Shoichi
Department Of Phamacology Niigata University School Of Medicine
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Katano Yumi
Department Of Cardiology Pulmonology And Nephrology Yamagata University School Of Medicine
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TAKEDA Keisuke
Department of Applied Chemistry, Faculty of Engineering, Gunma University
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OTORII Takeshi
Department of Pharmacology, Niigata University School of Medicine
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HORII Daijiro
Research Laboratories, Mitsubishi Yuka Pharmaceutical Co., Ltd.
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Takeda Keisuke
Department Of Applied Chemistry Faculty Of Engineering Gunma University
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Otorii Takeshi
Department Of Pharmacology Niigata University Schcol Of Medicine
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OTORII Takeshi
Department of Phamacology, Niigata University School of Medicine
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KATANO Yumi
Department of Phamacology, Niigata University School of Medicine
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