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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Flavahan, N. A. Lorenz, R. R. Shimokawa, H. Vanhoutte, P. M. |
| Description | Author Affiliation: Shimokawa H ( Department of Physiology and Biophysics, Mayo Clinic and Mayo Foundation, Rochester, MN 55905.) |
| Abstract | 1. The possible interactions between prostacyclin and endothelium-derived relaxing factor were examined, in isolated coronary arteries of the pig treated with indomethacin (10(-5) M). 2. In organ chamber experiments, prostacyclin caused relaxations, which were potentiated in the presence of the endothelium; the potentiation was abolished by oxyhaemoglobin. 3. In bioassay experiments, prostacyclin caused minimal relaxations of bioassay rings without endothelium; these relaxations were potentiated when the bioassay ring was exposed to basally-released endothelium-derived relaxing factor (interaction between prostacyclin and basal endothelium-derived relaxing factor) and further augmented when the endothelial cells were exposed to the prostanoid (stimulated release of endothelium-derived relaxing factor). The endothelium-dependent, but not the direct effects of prostacyclin were augmented by superoxide dismutase plus catalase and abolished by oxyhaemoglobin. 4. Forskolin, a direct activator of adenylate cyclase, caused relaxations of rings without endothelium, which were augmented by the presence of the endothelium. 5. The relaxations induced by prostacyclin or forskolin also had an endothelium-dependent component in basilar and femoral arteries and in jugular veins of the pig. 6. The endothelium-dependent actions of prostacyclin probably reflect activation of adenylate cyclase. |
| ISSN | 00071188 |
| e-ISSN | 14765381 |
| Journal | British Journal of Pharmacology |
| Issue Number | 4 |
| Volume Number | 95 |
| Language | English |
| Publisher | Wiley Online Library(on behalf of The British Pharmacological Society) |
| Publisher Date | 1988-12-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Biological Factors Secretion Coronary Vessels Drug Effects Epoprostenol Pharmacology Animals Colforsin Physiology Endothelium, Vascular In Vitro Techniques Muscle Relaxation Muscle, Smooth, Vascular Nitric Oxide Swine Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pharmacology |
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