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Inhibition of blood platelet adhesion by phenolics' rich fraction of Hippophae rhamnoides L. fruits.
Journal of Physiology and Pharmacology : An Official Journal of the Polish Physiological Society 2017 April
Beneficial influence of fruits on human health may be their ability to prevent the hyperactivation of blood platelets and cardiovascular disorders. Effects of the phenolic fraction from Hippophae rhamnoides fruit on different stages of blood platelet activation (platelet adhesion and aggregation) were studied in vitro. We also examined effects of the H. rhamnoides fraction on metabolism of thiol groups, which plays an important role in platelet functions. The effects of the H. rhamnoides fraction on adhesion of blood platelets to collagen and fibrinogen were determined with Tuszynski's and Murphy's method. The platelet aggregation was determined with turbidimetry. The action of the H. rhamnoides fraction on the level of thiol groups in platelet proteins and a level of glutathione (GSH) in platelets was estimated with 5,5'-dithio-bis(2-nitro-benzoic acid). The tested fraction of H. rhamnoides (0.5 - 50 μg/ml; 30 min of the incubation time 30 min) inhibited blood platelets adhesion to collagen and fibrinogen. The effect of the tested fraction on blood platelet adhesion depended on concentration of fraction. In presence of the highest tested concentration which was 50 μg/ml, inhibition of platelet adhesion for thrombin-activated platelets was about 55%. On the other hand, tested plant fraction had no anti-aggregatory properties. Our results showed anti-adhesive properties of phenolic fraction from H. rhamnoides fruit and we suggest that it may be beneficial for prevention of cardiovascular diseases.
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