Pharmacological Studies on a New Antihypertensive Agent, S-2150, a Benzothiazepine Derivative: 1. Antinecrotic and Antiarrhythmic Effects in Reperfused Rat Hearts
| Autor: | Yukio Takahara, Osamu Uno, Susumu Funakawa, Masao Masui, Kazuki Matsunaga, Shin-ichi Mihara, Kazumi Iwaki |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Male
Cardiac function curve medicine.medical_specialty Vasodilator Agents Ischemia Myocardial Reperfusion Injury In Vitro Techniques Ventricular tachycardia Diltiazem Necrosis Coronary Circulation Internal medicine medicine Prazosin Animals Myocardial infarction Rats Wistar Creatine Kinase Adrenergic alpha-Antagonists Pharmacology Fibrillation business.industry Arrhythmias Cardiac Heart Calcium Channel Blockers medicine.disease Rats Anesthesia cardiovascular system Cardiology Drug Therapy Combination medicine.symptom Cardiology and Cardiovascular Medicine business Anti-Arrhythmia Agents Reperfusion injury Protein Binding medicine.drug |
| Zdroj: | Journal of Cardiovascular Pharmacology. 28:526-532 |
| ISSN: | 0160-2446 |
| DOI: | 10.1097/00005344-199610000-00008 |
| Popis: | S-2150 is a new 1,5-benzothiazepine derivative that inhibits [ 3 H]diltiazem and [ 3 H]WB4101 bindings to the membrane of rat tissue. The effects of S-2150 on ischemia/reperfusion injury were studied in anesthetized rats. S-2150 reduced the myocardial infarct size (IS) induced by 20-min coronary artery occlusion followed by reperfusion. To evaluate reperfusion-induced ventricular tachycardia and fibrillation (VT, VF), we occluded the coronary artery for 4 min and then reperfused it. The incidence of arrhythmia was blocked by S-2150, and this effect offered protection against cardiac death. Prazosin did not modify the IS or incidence of reperfusion arrhythmias, but combined treatment with a noneffective dose of diltiazem showed significant cardioprotective effects. We also compared the direct effects of S-2150 and diltiazem on cardiac function and coronary perfusion flow using isolated rat hearts. Both drugs decreased mechanical function and increased coronary flow, with S-2150 being less cardiodepressive and more vasodilatory. S-2150 is cardioprotective at doses comparable to hypotensive doses even though its cardiodepressant effect is much weaker than that of diltiazem. This effectiveness may be partly explained by its dual characteristics : blocking the Ca channel and the α 1 -adrenoceptor. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|