title: A quantitative study to assess synergistic interactions between urotensin II and angiotensin II.
abstract: Interaction between the vasoactive peptides, urotensin II and angiotensin II, could have important implications in various disease states. We examined this interaction using isolated rat aortic rings with intact adventitia and endothelium. The fixed-ratio combination we tested produced effect levels significantly greater than predicted by additivity. Thus, the interaction was synergistic, and this is illustrated in a response surface plot that shows the predicted additive effect for all possible combinations.
authors: Department of Pharmacology and Center for Substance Abuse Research, Temple University School of Medicine, Philadelphia, PA, USA.
authors: Neil S
authors: NS
authors: Lamarre
authors: Ronald J
authors: RJ
authors: Tallarida
mesh_terms: D000804:Angiotensin II / Q000494:pharmacology*; D000818:Animals; D001013:Aorta, Thoracic / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D066298:In Vitro Techniques; D008297:Male; D009131:Muscle, Smooth, Vascular / Q000187:drug effects*; D011189:Potassium Chloride / Q000037:antagonists & inhibitors / Q000494:pharmacology; D051381:Rats; D017207:Rats, Sprague-Dawley; D014579:Urotensins / Q000494:pharmacology*; D014662:Vasoconstrictor Agents / Q000037:antagonists & inhibitors / Q000494:pharmacology
chemical_list: D014579:Urotensins; D014662:Vasoconstrictor Agents; D000804:Angiotensin II; D011189:Potassium Chloride; C029677:urotensin II