title: Blocking effects of OPC-21268 and OPC-31260 (vasopressin V1- and V2-receptor antagonists) on vasopressin-induced constrictions in isolated, perfused dog femoral arteries.
abstract: Using a perfusion technique of isolated vessels, constrictor responses to vasopressin (VP) and norepinephrine (NE) were investigated in perfused dog femoral arteries. Both OPC-21268, a selective V1-antagonist, and OPC-31260, a selective V2-antagonist, significantly shifted the VP-induced dose response curves to the right without influencing the NE-induced ones. The blocking effects of OPC-31260 were much greater than those of OPC-21268, suggesting that there may probably be functional V1- and V2-receptors in isolated dog femoral arteries that mediate vasoconstriction.
authors.affiliation: Department of Pharmacology, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Chiba
authors.forename: M
authors.initials: M
authors.lastname: Tsukada
mesh_terms: D057911:Angiotensin Receptor Antagonists; D000818:Animals; D001552:Benzazepines / Q000494:pharmacology*; D004285:Dogs; D004305:Dose-Response Relationship, Drug; D005263:Femoral Artery; D009638:Norepinephrine / Q000494:pharmacology; D010880:Piperidines / Q000494:pharmacology*; D015363:Quinolones / Q000494:pharmacology*; D017483:Receptors, Vasopressin; D014661:Vasoconstriction / Q000187:drug effects*; D014667:Vasopressins / Q000494:pharmacology*
chemical_list: D057911:Angiotensin Receptor Antagonists; D001552:Benzazepines; D010880:Piperidines; D015363:Quinolones; D017483:Receptors, Vasopressin; D014667:Vasopressins; C068644:OPC 21268; C076251:mozavaptan; D009638:Norepinephrine