Safety, Pharmacokinetic and Pharmacodynamic Studies of Batifiban Injection Following Single-and Multiple-Dose Administration to Healthy Chinese Subjects

Batifiban, a synthetic cyclic peptide, is a potent platelet glycoprotein GPⅡb/Ⅲa antagonist which may be useful in the treatment and prevention of acute coronary syndromes. The pharmacokinetics and pharmacodymanic （inhibition of platelet aggregation） effects, and tolerability of batifiban were investigated in healthy subjects following single bolus injection with doses of 55, 110, or 220 μg/kg, or multiple doses of an bolus followed intravenous infusion for 24 h （180 μg/kg plus 2.0 μg/minokg, and 220 μg/kg plus 2.5μg/minokg） in this phase I clinical trial. Plasma levels of batifiban and areas under the curve were found to be proportional to doses. Batifiban was rapidly eliminated with a half-life of approximately 2.5 h. Significant differences were noted for plasma levels of batifiban and areas under the curve between males and females. No significant differences in the terminal half-life were found between males and females. Batifiban reversibly inhibited ex vivo platelet aggregation in a dose- and concentration-dependent manner, consistent with its mechanism as a GPⅡ b/Ⅲa antagonist. Single and multiple intravenous doses of batifiban were found to be safe and well tolerated in healthy subjects. These results support a bolus injection plus intravenous infusion regimen of batifiban for the treatment and prevention of acute coronary syndromes.

半量替罗非班在老年急性心肌梗死急诊经皮冠状动脉介入治疗的疗效和安全性

目的 探讨半量替罗非班对老年急性ST段抬高心肌梗死（STEMI）患者急诊PCI的疗效及安全性.方法 入选STEMI行急诊PCI老年患者114例,随机分为标准剂量组56例和半量组58例.标准剂量组给予替罗非班0.10~0.15 μg/（kg·min）静脉滴注48 h,半量组给予0.05~0.075 μg/（kg·min）静脉滴注24 h.比较2组TIMI及心肌染色分级（MBG）2~3级血流率,术后90 min的ST段回落百分比（sumSTR）、LVEF、左心室舒张末和收缩末内径变化及主要心脏不良事件、出血、消化道不良反应的发生率.结果 标准剂量组TIMI及MBG 2~3级血流率较半量组虽有升高趋势,但差异无统计学意义（P〉0.05）;2组术后90 min的sumSTR〉50%比例及患者住院期间不良事件发生率比较,差异无统计学意义（P〉0.05）;半量组出血发生率低于标准剂量组（3.45% vs 16.07%,P〈0.05）.结论 半量替罗非班在预防缺血方面的疗效与标准剂量相当,但在出血风险方面的安全性明显升高.

冠状动脉内注射替罗非班对急诊介入治疗中慢血流现象的临床疗效

目的探讨冠状动脉内注射血小板膜糖蛋白Ⅱb/Ⅲa受体拮抗剂治疗急诊PCI中出现冠状动脉慢血流现象(CSF)患者的临床疗效及安全性。方法入选99例急诊PCI中出现CSF的患者,根据是否冠状动脉内注射替罗非班,分为替罗非班组44例和对照组55例;比较2组PCI术后即刻TIMI血流,术后90min完全ST段回落率、住院期间以及3个月随访LVEF、主要不良心血管事件(MACE)和出血事件。结果与对照组比较,替罗非班组术后ST段回落率明显增加(84.1%vs 65.5%,P=0.036),LVEF改善情况明显提高[(7.74±4.21)%vs(5.17±3.63)%,P=0.002],2组术后3个月MACE发生率无明显差异(P=0.466);出血事件差异无统计学意义(P=0.302)。结论急诊PCI中出现CSF情况时,冠状动脉内注射替罗非班可改善心肌灌注,加快LVEF的恢复。