ENHANCEMENT OF CORONARY VASODILATING ACTION OF ADENOSINE BY DILAZEP AND DIPYRIDAMOLE IN THE DOG

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概要

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• The mechanism of the augmentation of adenosine action by 1, 4-bis-[3(3, 4, 5-trimethoxybenzoyl-oxy)-propyl] perhydro-1, 4-diazepine (dilazep I, N, N, ) and dipyridamole on the coronary vessel was examined in the dog. Cororary blood flow was measured by applying a Morawitz cannula to the <I>in vivo</I> heart. It was found that the ratio of coronary vasodilating activity of adenosine administered into saphenous vein, right atrium, and left atrium was 1: 1.5: 30, and that coronary vasodilating actions of adenosine administered into saphenous vein, right atrium, and left atrium after dilazep (10 μg/kg, i.v.) were 15.6, 10.8, and 3.3 times greater than those without dilazep, respectively. After dipyridamole coronary vasodilating actions of adenosine administered into saphenous vein, right atrium, and left atrium were 17.5, 14.3, and 5.4 times greater. These results indicate that augmentation of coronary vasodilating action of intravenously administered adenosine by dilazep or dipyridamole was mainly exerted at the lung and myocardium, and slightly in the blood, and was due to inhibition of the disappearance of adenosine.

• 社団法人 日本薬理学会の論文

著者

• Sano Nobuyuki

  Departments Of Pediatric Surgery Tohoku University School Of Medicine

• SANO Nobuyuki

  Department of Pharmacology, Tokyo Research Laboratories, Kowa Company, Ltd.

• SANO Nobuyuki

  Department of Pharmacology, Tohoku University School of Medicine

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