活性蛋白C在埃米齐祖马布和活性蛋白质复合物缩剂的共存在中的耐药性
Yuto Nakajima1,2, Mitsumasa Osuna1, Kuniyoshi Mizumachi1
1Department of Pediatrics, Nara Medical University, Kashihara, Nara, Japan.
Research and practice in thrombosis and haemostasis
|August 8, 2024
概括
激活蛋白C (APC) 耐药性,由激活血栓复合物度 (APCC) 中的凝固因子FII和FIXa驱动,可能解释血友病A患者的静脉血栓塞栓事件,这些患者接受了埃米齐祖马布和APCC治疗.
科学领域:
- 血液学 血液学 血液学
- 血液静止和血栓形成
- 药理学 药理学是指药理学的学科.
背景情况:
- 在A型血友病中观察到的静脉血栓栓塞事件 (VTE) 患者接受埃米齐祖马布和活性血栓复合物缩剂 (APCC) 缺乏明确的机制解释.
- 活性蛋白C (APC) 和抗血素 (AT) 耐药性是这些不良事件的假设贡献者.
研究的目的:
- 为了研究与埃米齐祖马布和APCC联合使用时,在缺乏第八因子 (FVIIIdef) 血中APC和AT耐药性的潜力.
- 阐明APCC中可能诱导APC耐药性的特定凝固因子.
主要方法:
- 用聚合正常或FVIIIdef血治疗艾米齐祖马布和各种绕道剂 (重组FVIIa,APCC,血衍生FVIIa/FX) 进行了血栓生成试验.
- 评估了不同度的AT和APC的抑制作用.
- 在FVIIIdef血中进一步检查了APC的影响,并与埃米齐祖马布,FII和/或FIXa一起进行了进一步检查.
主要成果:
- 与埃米齐祖马布和任何绕过剂一起没有观察到显著的AT耐药性.
- 在正常和FVIIIdef血中,APC表现出与埃米齐祖马布和复合FVIIa或血衍生FVIIa/FX.的剂量依赖性抑制.
- 在FVIIIdef血中,APC与艾米齐祖马布和APCC对血栓生成的影响很小,这表明部分抗APC.
- 在FVIIIdef血中将FIXa,特别是FII和FIXa添加到埃米齐祖马布中,导致明显的APC耐药性.
结论:
- 在APCC中,因子II (FII) 和因子IXa (FIXa) 被确定为艾米齐祖马布治疗的FVIIIdef血中APC耐药性的关键贡献者.
- 这种APC耐药性可能在A型血友病患者的VTE发生中发挥重要作用,患者同时接受埃米齐祖马布和APCC治疗.
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