血小板GPⅡb/Ⅲa拮抗剂RGDS和钙通道拮抗剂Nifedipine对GPIIb/IIIa活化的影响  

The Effect of Platelet GP Ⅱ b/Ⅲ a Antagonist RGDS and Calcium Channel Antagonist Nifedipine on GPIIb/IIIa Activation

作　　者：杨国雷[1] 尹松梅[2] 张复华[1] 牛国敏[1] 凌奕文[1] 

机构地区：[1]南方医科大学附属南海医院血液内科,广东佛山528200 [2]中山大学附属第二医院血液内科,广东广州510120

出　　处：《中外医疗》2014年第10期14-15,共2页China & Foreign Medical Treatment

摘　　要：目的探讨GPⅡb/Ⅲa拮抗剂RGDS和钙通道拮抗剂Nifedipine对ADP诱导的血小板GPⅡb/Ⅲa活化的影响。方法 GP II b/11I a特异性抗体PAC-1标记活化GP II b/11I a,流式细胞仪检测静息及ADP(5μmol/L)诱导的血小板PAC-1表达率。结果静息状态下的血小板PAC-1表达率为(0.80±0.85)%;在ADP(5μmol/L)激动下,PAC-1表达率为(77.27±9.47)%;RGDS以浓度依赖性的方式抑制PAC-1表达率,IC50值为206μmol/L;Nifedipine能以浓度依赖性的方式抑制PAC-1表达率,IC50值为178μmol/L;RGDS联合Nifedipine对PAC-1表达的联合抑制率为(60.15±16.35)%,二者的交互效应差异有统计学意义(P<0.05)。结论 GPIIb/IIIa受体拮抗剂RGDS和Ca2+拮抗剂Nifedipine均抑制ADP诱导的血小板GPIIb/IIIa活化,其抑制作用呈浓度依赖性,随拮抗剂浓度增加抑制作用增强;两者对血小板GPIIb/IIIa活化的抑制存在协同作用。Objective This study is to find out the effect of GPIIb/IIIa antagonist RGDS and calcium channel antagonist Nifedipine on platelet GPⅡb/Ⅲa activation. Methods GPⅡb/Ⅲa activation was determined by the expression of PAC-1, an antibody against activated GPⅡb/Ⅲa, expression of PAC-1 stimulated with ADP （5μmol/L） was analyzed by a flow cytometer. Results To the healthy platelets, PAC-1 expression rate was （0.80±0.85） %; PAC-1 expression rate was （77.27±9.47） % on platelets induced by ADP （5μmol/L）. RGDS could inhibit PAC-1-expression in a dose-dependent manner, the concentration producing 50% inhibition rate （IC50） is 206μmol/L. Nifedipine could inhibit PAC-1-expression in a dose-dependent manner , the concentration producing 50%inhibition rate （IC50） is 178μmol/L;The combined inhibition rate of RGDS and Nifedipine on PAC-1 binding was （60.15± 16.35）%, the interaction between Nifedipine and RGDS to PAC-1 binding was significant （P〈0.05）, both could strengthen each other＆#39;s effect. Conclusion Both GPIIb/IIIa antagonist RGDS and Ca2＋ antagonist Nifedipine could inhibit GPIIb/IIIa activation in a dose-dependent manner. The inhibition rate increases when the concentration of RGDS or Nifedipine becomes higher. Both could strengthen each other＆#39;s effect on inhibiting platelet aggregation.

关 键 词：血小板活化 GPⅡb Ⅲa拮抗剂 钙通道拮抗剂 PAC-1 

分 类 号：R96[医药卫生—药理学]