蛇床子素抑制血栓形成和血小板聚集的实验研究

目的　观察蛇床子素抑制血栓形成和血小板聚集的作用。方法　利用大鼠动-静脉旁路血栓形成模型和小鼠尾静脉注射胶原-肾上腺素合剂诱导血栓形成模型,分别测定给蛇床子素10、20、40mg·kg-1后血栓湿重和干重, 5min内小鼠死亡数和15min内偏瘫恢复数;分别采用ADP、凝血酶、花生四烯酸钠为诱导剂,测定经不同浓度蛇床子素处理后1、3、5min时血小板聚集率及最大聚集率的改变。结果　蛇床子素可以抑制大鼠动-静脉旁路血栓形成,减轻血栓湿重及干重;抑制胶原-肾上腺素合剂诱导的血栓形成,降低5min内的小鼠死亡率,提高15min内偏瘫小鼠的恢复率;蛇床子素在体外可抑制ADP、凝血酶、花生四烯酸钠诱导的血小板聚集,其IC50分别为0 .44、0 .186、0 .421g·L-1。结论　蛇床子素可明显抑制血栓形成和血小板的聚集。

Experimental study of osthole on inhibition of thrombosis and platelet aggregation

Aim To investigate the effect of osthole against thrombosis and platelet aggregation.Methods Rat model of artery-vein bypass thrombosis and mouse model of thrombosis by injecting collagen-adrenaline to the vein of the tail were used to measure the thrombus weight and to observe the number of dead mice in 5 min and the recovery mice from hemiplegia in 15 min. ADP,thrombin and arachidonic acid were used to induce platelet aggregation on human and the rate of platelet aggregation in 1,3 and 5 min and the maximum rate of platelet aggregation were detected.Results Osthole inhibited artery-vein bypass thrombosis and reduced thrombus weight in rats to defferent degrees,inhibited the thrombosis induced by collagen-adrenaline and reduced the death rate in 5 min and increased the recovery rate in 15 min. Osthole also inhibited human platelet aggregation induced by ADP,thrombin and arachidonic acid in vitro.The values of IC_(50 )(dose of the drug giving 50% inhibition) were 0.444 g·L~(-1) for ADP,0.186 g·L~(-1) for thrombin, 0.421 g·L~(-1) for arachidonic acid, respectively.Conclusion Osthole exert remarkable effects against thrombosis and platelet aggregation.