Role of platelet-activating factor in the reperfusion injury of rabbit ischemic heart

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · American Journal of Pathology; (USA)

OSTI ID:6870277

Montrucchio, G; Alloatti, G; Mariano, F; de Paulis, R; Comino, A; Emanuelli, G; Camussi, G ^[1]

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1. Clinica Medica Generale III, Gonzaga (Italy)

This study shows that the administration of the PAF receptor antagonist SDZ 63.675 (5 mg/kg body weight) before reperfusion significantly reduced the hematologic and hemodynamic alterations, as well as the size of necrotic area in rabbits subjected to 40 minutes of coronary occlusion and reperfusion. Pretreatment with SDZ 63.675 prevented the reduction of platelet counts in the blood obtained from the right ventricle (86.6 +/- 2.8% of the control preischemia value) and the transient bradycardia (85.0 +/- 2.8%), the systemic hypotension (58.0 +/- 2.8%), and the increase in right ventricular pressure (125.0 +/- 3.6%) that were evident in the first minutes of reperfusion in untreated control rabbits. Two as well as 24 hours after reperfusion, the infarct size, judged by staining with tetrazolium, was significantly reduced in rabbits treated with SDZ 63.675 (infarct size in control animals, 66.0 +/- 2.9% and 63.46 +/- 2.09% of the risk region at 2 or 24 hours, respectively, compared with 38.9 +/- 5.2% and 37.11 +/- 2.44% of the risk region at 2 and 24 hours in rabbits treated with SDZ 63.675). This result was confirmed by histologic examination of cardiac tissue 24 hours after reperfusion. In addition, SDZ 63.675 markedly reduced the accumulation of 111In-oxine-labeled platelets that occurs 15 minutes after reperfusion in the central ischemic area of the heart and in the lungs. These results suggest that PAF plays a role in the evolution of myocardial injury observed during reperfusion.

• OSTI ID: 6870277
• Journal Information: American Journal of Pathology; (USA), Journal Name: American Journal of Pathology; (USA) Vol. 137:1; ISSN AJPAA; ISSN 0002-9440
• Country of Publication: United States
• Language: English

Related Subjects

550901* -- Pathology-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
ANIMALS
AROMATICS
AZAARENES
AZINES
BETA DECAY RADIOISOTOPES
BIOLOGICAL FUNCTIONS
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BLOOD COAGULATION FACTORS
BLOOD COUNT
BLOOD PLATELETS
BLOOD PRESSURE
BODY
BODY FLUIDS
CARDIOVASCULAR DISEASES
COAGULANTS
DAYS LIVING RADIOISOTOPES
DISEASES
DRUGS
ELECTRON CAPTURE RADIOISOTOPES
FUNCTIONS
HEMATOLOGIC AGENTS
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
INDIUM 111
INDIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
LEUKOCYTES
MAMMALS
MATERIALS
MINUTES LIVING RADIOISOTOPES
MYOCARDIAL INFARCTION
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANS
OXINE
PATHOGENESIS
PERFUSED ORGANS
PROTEINS
PYRIDINES
QUINOLINES
RABBITS
RADIOISOTOPES
TRACER TECHNIQUES
VERTEBRATES