在动物等离子体中比较血栓生成:对人类XIa因子和组织因子的敏感性
Yideng Liang1, Ivan Tarandovskiy1, Stepan S Surov1
1Office of Tissues and Advanced Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993, USA.
International journal of molecular sciences
|August 26, 2023
概括
动物血对人类血栓生成 (TG) 触发物的敏感性差异很大,这使得临床前药物试验结果直接转化为人体研究变得复杂. 触发度的优化对于准确的解释至关重要.
科学领域:
- 凝血科学是一门凝血科学.
- 翻译医学是一种翻译医学.
- 临床前研究 临床前研究
背景情况:
- 动物模型对于临床前药物评估和选择人类临床试验标记物至关重要.
- 血栓生成 (TG) 试验用于评估凝血.
- 了解TG试验中的跨物种差异对于翻译研究至关重要.
研究的目的:
- 通过评估动物血对人类组织因子 (TF) 和激活因子XI (FXIa) 的敏感性来评估动物血生成 (TG) 试验的实用性.
- 为了比较各种动物物种和人类的TG检测参数.
- 为了确定将动物模型结果推断到人体试验的可行性.
主要方法:
- 使用了来自人类和多种动物 (老鼠,老鼠,几内亚猪,子,牛,绵羊,山羊) 的血.
- 使用光和光学密度测量TF-和FXIa触发的TG和凝血.
- 分析的关键参数包括血栓峰值高度 (TPH),血栓时间 (TPT),凝块时间 (CT) 和纤维素凝块密度 (FCD).
- 触发因素的灵敏度边界 (LSB和HSB) 根据最大参数值或基线活动来定义.
主要成果:
- 与大多数动物等离子体相比,人类血对TF和FXIa触发剂的TPH HSB水平较低.
- 除小鼠外,动物血与人类相比,对FXIa具有较低的TPT LSB.
- 动物和子等离子体经常显示基线TG,表明预激活.
- 在所有测试的等离子体中,纤维素凝块密度 (FCD) 对TF和FXIa都不敏感.
- 在动物血中观察到TF和FXIa敏感性的显著变化.
结论:
- 动物等离子体对人类TF和FXIa表现出高度可变的敏感性.
- 在一些动物等离子体中,凝血的预激活需要仔细的测试解释.
- 在临床应用之前,动物TG测定需要优化触发度.
- 这种变异性使得将动物模型的研究结果推断到人类研究中变得复杂,突出了需要谨慎解释的需要.
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