The effect of ibuprofen on accumulation of indium-111-labeled platelets and leukocytes in experimental myocardial infarction

Journal Article · Mon Nov 01 00:00:00 EST 1982 · Circulation; (United States)

DOI:https://doi.org/10.1161/01.CIR.66.5.1002· OSTI ID:5652456

Romson, J L; Hook, B G; Rigot, V H; Schark, M A; Swanson, D P; Lucchesi, B R

To assess the ability of ibuprofen to influence the extent of platelet aggregation and leukocyte infiltration during acute myocardial infarction, autologous indium-111 (/sup 111/In)-labeled platelets or leukocytes were injected before 60 minutes of left circumflex coronary artery (LCx) occlusion, followed by 24 hours of reperfusion in the canine heart. Myocardial infarct size, as a percent of the area at risk, was reduced in the ibuprofen-treated group (12.5 mg/kg i.v. every 4 hours beginning 30 minutes before LCx occulsion) by 40%, from 48 +/- 4% in control animals to 29 +/- 4% in ibuprofen-treated dogs (p=0.005). Quantification of the platelet-associated /sup 111/In radioactivity in irreversibly injured myocardium indicated that ibuprofen did not alter the accumulation of platelets in infarcted myocardium. In contrast, leukocyte accumulation in infarcted tissue was reduced significantly. In tissue samples with 0.41-0.60 gram infarct, the infarcted/normal ratio of leukocyte radioactivity was 12 +/- 2 in control dogs and 4 +/- 1 in ibuprofen-treated dogs, which represents a 67% reduction in leukocyte accumulation in ibuprofen-treated compared with control dogs. Similar reductions were found in other gram-infarct-weight categories. Although both platelets and leukocytes acumulate in infarcted canine myocardium, ibuprofen may exert its beneficial effect on ischemic myocardium by suppressing the inflammatory response associated with myocardial ischemia and infarction.

• Research Organization: Univ. of Michigan, Ann Arbor, MI (United States)
• OSTI ID: 5652456
• Journal Information: Circulation; (United States), Vol. 66:5
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
BLOOD PLATELETS
LABELLING
DRUGS
BIOLOGICAL EFFECTS
LEUKOCYTES
MYOCARDIUM
AUTORADIOGRAPHY
BIOLOGICAL ACCUMULATION
DOGS
INDIUM 111
INFLAMMATION
INHIBITION
LABELLED COMPOUNDS
MYOCARDIAL INFARCTION
TRACER TECHNIQUES
ANIMALS
BETA DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BODY
BODY FLUIDS
CARDIOVASCULAR DISEASES
CARDIOVASCULAR SYSTEM
DAYS LIVING RADIOISOTOPES
DISEASES
ELECTRON CAPTURE RADIOISOTOPES
HEART
INDIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
MAMMALS
MATERIALS
MINUTES LIVING RADIOISOTOPES
MUSCLES
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PATHOLOGICAL CHANGES
RADIOISOTOPES
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550601* - Medicine- Unsealed Radionuclides in Diagnostics