title: Stabilization of cardiac lysosomal and cellular membranes in protection of ischemic myocardium due to coronary occlusion:efficacy of the nonsteroidal anti-inflammatory agent, naproxen.
abstract: The combined cellular membrane stabilizing and prostaglandin-inhibiting agent, naproxen, administered either 30 minutes before or after left coronary occlusion, induced significant preservation of the acutely ischemic experimental animal myocardium. A consistent extent of myocardial protection was provided as measured by ST segment elevation, plasma accumulation of CK activity, tissue CK activities, and amino-nitrogen concentrations, and ultrastructural integrity. Protection did not appear to be via hemodynamic mechanisms since naproxen neither altered pressure-rate product nor decreased coronary resistance. While the degree that inhibition of platelet thromboxane A2 generation contributes to these salutary results requires clarification due to possible simultaneous decrease of coronary endothelial PGI2 formation, the present study emphasizes the value of the concomitant special lysosomal and cellular stabilizing actions of naproxen. In contrast to acetylsalicylic acid, meclofenamate, and indomethacin which do not effect such benefit in the same experimental conditions, our results indicate that naproxen resembles the nonsteroidal anti-inflammatory agents which also possess membrane stabilizing properties, such as ibuprofen and flurbiprofen, and protects ischemic myocardium in similar adverse circumstances.
mesh_terms: D000818:Animals; D000893:Anti-Inflammatory Agents / Q000627:therapeutic use*; D001157:Arterial Occlusive Diseases / Q000188:drug therapy*; D002415:Cats; D002462:Cell Membrane / Q000187:drug effects; D003327:Coronary Disease / Q000188:drug therapy*; D003402:Creatine Kinase / Q000097:blood; D008247:Lysosomes / Q000187:drug effects* / Q000648:ultrastructure; D008297:Male; D009288:Naproxen / Q000627:therapeutic use*; D010974:Platelet Aggregation / Q000187:drug effects; D013929:Thromboxane B2 / Q000096:biosynthesis*; D013931:Thromboxanes / Q000096:biosynthesis*
chemical_list: D000893:Anti-Inflammatory Agents; D013931:Thromboxanes; D013929:Thromboxane B2; D009288:Naproxen; D003402:Creatine Kinase