The Effect of Low Molecular Weight Heparin (Fragmin) on Myocardial Neutrophil Accumulation and Infarct Size in a Rat Model of Myocardial Infarction
| Autor: | Ran Kornowski, David Hasdai, Nehemia Blumberg, Alexander Battler, Nira Varda-Bloom, Dan Ohad |
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| Rok vydání: | 1996 |
| Předmět: |
Dalteparin
Male medicine.medical_specialty Neutrophils medicine.drug_class medicine.medical_treatment Myocardial Infarction Low molecular weight heparin Lymphocyte Activation Rats Sprague-Dawley Internal medicine Antithrombotic medicine Animals Myocardial infarction Saline biology business.industry Anticoagulant Anticoagulants Heart Heparin medicine.disease Rats Disease Models Animal medicine.anatomical_structure Myeloperoxidase Cardiology biology.protein Cardiology and Cardiovascular Medicine business Artery medicine.drug |
| Zdroj: | Angiology. 47:491-499 |
| ISSN: | 1940-1574 0003-3197 |
| DOI: | 10.1177/000331979604700508 |
| Popis: | Background: Heparin molecules possess immunomodulating properties, which are thought to complement their established antithrombotic activity. The purpose of this study was to evaluate whether the antiinflammatory properties of low molecular weight heparin (LMWH) can attenuate polymorphonuclear neutrophil accumulation and infarct size in a rat model of myocardial infarction.Methods: Myocardial infarction was induced by ligating the left main coronary artery. LMWH (fragmin 500 anti-FXa u/kg) or vehicle (saline) were administered subcuta neously thirty minutes prior to coronary artery occlusion. Significant anticoagulant activity was attained with LMWH for more than eight hours. Twenty-four hours later, neutrophil accumulation and infarct size were determined by measuring left ventricular free wall myeloperoxidase and residual creatine kinase activity, respectively.Results: As compared with rats administered vehicle, myeloperoxidase activity was insignificantly decreased in rats treated with LMWH (1.24 ±0.28 u/g vs 1.66 ±0.15 u/g, P=0.16). Infarct size was also not significantly different between the groups (62.48 ±3.5% and 50.67 ±7.2% of left ventricular free wall with vehicle and LMWH, respec tively, P=0.1).Conclusion: The authors conclude that LMWH does not significantly reduce myocar dial neutrophil accumulation and infarct size twenty-four hours after myocardial infarc tion in the rat. |
| Databáze: | OpenAIRE |
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