Original Article

Effects of copper-aspirin complex on platelet-neutrophil interactions

Authors: Zhi-qiang SHEN, Peng CHEN, Ling LI, Wei-ping LIU

Abstract

AIM:
To investigate the effects of copper-aspirin complex on rat thrombosis and the interaction between platelets and neutrophils.
METHODS:
The model of electrically stimulated carotid artery thrombosis in Sprague Dawley rats was used; the effects of copper-aspirin complex on rat platelet-neutrophil adhesion and platelet aggregation stimulated by activated neutrophils were observed by rosette assay and Born's method, respectively.
RESULTS:
Intragastric copper-aspirin complex (5, 7, and 10 mg/kg) dose-dependently prolonged the occlusion time; it significantly decreased the rosette number formed between thrombin-activated platelets and neutrophils; the 50 % of inhibitory concentration (IC50) was (54.6+/-4.3) micromol/L. Copper-aspirin complex markedly inhibited rat platelet aggregation induced by either cell free supernatant of activated neutrophils or by activated neutrophil suspension. The values of IC50 were (224.5+/-16.2) micromol/L and (820.5+/-21.4) micromol/L, whereas aspirin had no influence.
CONCLUSION:
Copper-aspirin complex inhibited platelet-neutrophil interactions through a different property from aspirin and resulted in a more potent antithrombotic activity.
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