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中国临床药理学与治疗学 ›› 2012, Vol. 17 ›› Issue (12): 1355-1360.

• 基础研究 • 上一篇    下一篇

蝮蛇毒血小板抑制因子对动脉血栓形成的影响及机制研究

黄璐1, 张根葆1,2, 闵志雪1, 马开然1, 郑汝琦1, 孙瑶1, 吴娟1   

  1. 1皖南医学院病理生理学教研室,2蛇毒研究所,芜湖 241002,安徽
  • 收稿日期:2012-09-03 修回日期:2012-11-05 出版日期:2012-12-26 发布日期:2012-12-31
  • 作者简介:黄璐,女,硕士研究生,研究方向:心血管病理生理学。Tel: 18255354275 E-mail: xidianlulu1986@qq.com
  • 基金资助:
    安徽省教育厅自然科学基金重点资助项目(KJ2011A266)

Effect and mechanism of platelet inhibitor from Agkistrodon halys venom on artery thrombosis

HUANG Lu1, ZHANG Gen-bao1, 2, MIN Zhi-xue1, MA Kai-ran1, ZHENG Ru-qi1, SUN Yao1, WU Juan1   

  1. 1Department of Pathophysiology; 2Institute of snake venom, Wannan Medical College, Wuhu 241002, Anhui, China
  • Received:2012-09-03 Revised:2012-11-05 Online:2012-12-26 Published:2012-12-31

摘要: 目的: 探讨皖南蝮蛇毒血小板抑制因子(AHV-PI) 对家兔动脉血栓形成的影响及可能机制。方法: 新西兰家兔24只,随机分成假手术组、动脉血栓模型组、阳性对照组(奥扎格雷钠,5 mg/kg),AHV-PI(0.1 mg/kg)实验组共4组,每组6只。应用70% FeCl3溶液化学损伤的方法来制备家兔颈动脉血栓模型,采用血栓弹力仪(TEG)描计血栓弹力图,比浊法测定家兔血小板聚集率,ELISA测定各组血浆中α颗粒膜蛋白(GMP-140)和血栓素B2(TXB2)水平,光镜和透射电镜分别观察动脉血栓形成和血小板形态的改变。结果: AHV-PI实验组与模型组相比,血栓弹力图凝血时间(R)值和血凝块形成时间(K)值延长(P<0.01 和P<0.05),Alpha角度、最大幅度(MA)和凝血指数(CI)减小(P<0.05 和P<0.01);血小板聚集率的各项指标均明显降低(P<0.05);血浆中GMP-140和TXB2含量降低(P<0.01)。AHV-PI实验组光镜下动脉内未见血栓形成,血小板电镜显示血小板形态基本规则,与模型组相比伪足较少,α-颗粒和致密颗粒无明显减少,胞浆空泡化现象减轻。结论: AHV-PI可以通过抑制血小板聚集,防止动脉血栓的形成,其机制可能与之保护血小板超微结构,减少血小板脂质代谢和颗粒内容物的释放有关。

关键词: 蝮蛇毒, 血小板抑制因子, 动脉血栓, 血小板

Abstract: AIM: To explore the effect and mechanism of platelet inhibitor from Agkistrodon halys venom (AHV-PI) on artery thrombosis in rabbits. METHODS: Twenty-four New Zealand rabbits were randomly divided into normal control, artery thrombosis model, positive control (sodium ozagrel at dose of 5 mg/kg) and AHV-PI (0.1 mg/kg) experiment groups (n=6 for each). The model of rabbits carotid artery thrombosis was induced by infiltering 70% FeCl3. Thrombelastogram was obtained by thromboelastography instrument. The experiment of platelet aggregation was determined by the turbidimetric method. The content of GMP-140 and TXB2 in plasma were determined by ELISA. The structural changes of the artery thrombosis and platelet were observed under microscope and transmission electron microscope respectively. RESULTS: Compared with model group, R and K were significantly prolonged in AHV-PI experiment group. The alpha angle, MA, CI and the indices of platelet aggregation were decreased (P<0.01 and P<0.05). The levels of GMP-140 and TXB2 in plasma were decreased (P<0.01). Artery thrombosis histological observation showed that thrombosis in AHV-PI experiment group were not found. Platelet electron microscope showed that the platelet morphology and ultrastructure approach normal control group. AHV-PI can inhibit producing pseudopods process and increase in the number of theαgranules associated with enhanced intensities of their electron densities compared with model group. CONCLUSION: AHV-PI can inhibit platelet aggregation and provent the information of artery thrombosis. The mechanism may be attributed to protecting platelet ultrastructure and reducing the release of platelet lipid metabolism and particulate contents.

Key words: Agkistrodon halys venom, Platelet inhibitor, Artery thrombosis, Platelet

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