title: Reduction of adverse acute cardiovascular actions of 6-hydroxydopamine in dogs by adrenergic receptor blockade.
abstract: Injection of dogs with 50 mg/kg of 6-hydroxydopamine (6-OHDA) caused large increases in blood pressure and heart rate, followed after 1 or 2 hr by severe hypotension. Prior administration of the adrenergic receptor blocking agents phentolamine and propranolol attenuated both the hyper- and hypotensive phases of 6-OHDA. Phentolamine and propranolol did not prevent depletionof norepinephrine or development of the characteristic morphological changes induced in adrenergic fibers by 6-OHDA.
mesh_terms: D000317:Adrenergic alpha-Antagonists / Q000494:pharmacology*; D000319:Adrenergic beta-Antagonists / Q000494:pharmacology*; D000818:Animals; D004285:Dogs; D005260:Female; D006439:Hemodynamics / Q000187:drug effects*; D006892:Hydroxydopamines / Q000037:antagonists & inhibitors* / Q000494:pharmacology; D008297:Male; D009638:Norepinephrine / Q000378:metabolism; D010646:Phentolamine / Q000494:pharmacology; D011433:Propranolol / Q000494:pharmacology; D013564:Sympathetic Nervous System / Q000378:metabolism; D013997:Time Factors
chemical_list: D000317:Adrenergic alpha-Antagonists; D000319:Adrenergic beta-Antagonists; D006892:Hydroxydopamines; D011433:Propranolol; D009638:Norepinephrine; D010646:Phentolamine