title: Studies on the cellular mechanisms of action of positive and negative inotropic agents.
abstract: We have reviewed the mechanism by which drugs that elevate cyclic AMP level modify myocardial contractility. We have presented preliminary evidence about the mechanism by which muscarinic agonists antagonize the effects of these drugs. Finally, we suggest that the protein phosphorylation experiments, particularly if done in dispersed myocytes, could be an efficient and cost-effective method of screening drugs which may act by elevating intracellular levels of cyclic AMP.
authors.affiliation: Department of Medicine, Indiana University School of Medicine.
authors.forename: A M
authors.initials: AM
authors.lastname: Watanabe
authors.forename: F
authors.initials: F
authors.lastname: Green
authors.forename: Z
authors.initials: Z
authors.lastname: Ahmad
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D002135:Calcium-Binding Proteins / Q000378:metabolism; D002316:Cardiotonic Agents / Q000494:pharmacology*; D000242:Cyclic AMP / Q000032:analysis; D010766:Phosphorylation; D000099211:Phospholamban
chemical_list: D000109:Acetylcholine; D002135:Calcium-Binding Proteins; D002316:Cardiotonic Agents; D000242:Cyclic AMP; D000099211:Phospholamban