title: Beta-adrenoceptor desensitization during the development of canine pacing-induced heart failure.
abstract: 1. The goal of this review is to emphasize four major points regarding the development of catecholamine desensitization in heart failure (HF). 2. Catecholamine desensitization occurs prior to the development of HF (i.e. after 1 day of rapid pacing, physiological responses to beta-adrenoceptor stimulation are depressed by over 50%, yet no evidence of HF is observed for 3-4 weeks of rapid pacing). 3. Multiple mechanisms in the beta-adrenoceptor cascade are involved. In HF there are decreases in beta 1-adrenoceptors, high affinity beta-adrenoceptors, adenylyl cyclase activity and messenger RNA and increases in Gi. 4. Not all mechanisms appear simultaneously (i.e. early decreases occur in high affinity beta-adrenoceptors and adenylyl cyclase; late increases in Gi and decreases in beta-adrenoceptor density evolves). 5. Mechanisms distal to cAMP generation also play a role (i.e. alterations in ryanodine receptor binding and excitation-contraction coupling also occur).
authors.affiliation: Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.
authors.forename: D E
authors.initials: DE
authors.lastname: Vatner
authors.forename: N
authors.initials: N
authors.lastname: Sato
authors.forename: Y
authors.initials: Y
authors.lastname: Ishikawa
authors.forename: K
authors.initials: K
authors.lastname: Kiuchi
authors.forename: R P
authors.initials: RP
authors.lastname: Shannon
authors.forename: S F
authors.initials: SF
authors.lastname: Vatner
mesh_terms: D000318:Adrenergic beta-Agonists / Q000378:metabolism* / Q000494:pharmacology; D000818:Animals; D001667:Binding, Competitive; D002304:Cardiac Pacing, Artificial; D004285:Dogs; D006333:Heart Failure / Q000209:etiology / Q000378:metabolism*; D006801:Humans; D007545:Isoproterenol / Q000378:metabolism / Q000494:pharmacology*; D009206:Myocardium / Q000201:enzymology / Q000378:metabolism; D009638:Norepinephrine / Q000097:blood; D012433:Ryanodine / Q000378:metabolism
chemical_list: D000318:Adrenergic beta-Agonists; D012433:Ryanodine; D007545:Isoproterenol; D009638:Norepinephrine