大分子药物的局部耗尽是由于在组织间隙空间中的标结合导致的
Tatiana Zasedateleva1, Stephan Schaller1, Elizabeth C M de Lange2
1ESQlabs GmbH, Saterland, Germany.
CPT: pharmacometrics & systems pharmacology
|November 12, 2024
概括
目标介导药物排放 (TMDD) 显著影响组织药物度,即使具有线性血药理动力学. 了解TMDD对于准确预测药物度至关重要,特别是在组织中.
科学领域:
- 药理学 药理学是指药理学的学科.
- 药理动力学 药理动力学
- 生物技术是生物技术.
背景情况:
- 药物标结合影响药理动力学和药理动力学,这种现象被称为标介导药物排放 (TMDD).
- 对于表现出非线性血药理学的生物药物和药物来说,TMDD模型至关重要,重点关注未结合的药物度.
- 组织表达的点可能导致在血度中不明显的TMDD效应,影响局部药物水平和点占用.
研究的目的:
- 评估基于组织的TMDD对局部药物度和目标占用量的影响.
- 通过全身生理学基础药理动力学 (PBPK) 模型,审查典型的TMDD参数值及其影响.
主要方法:
- 对TMDD参数值的文献审查.
- 使用整体PBPK模型进行分析,包括TMDD.
- 对药物特定参数 (例如,Kd,kint,koff,水力动力半径) 的灵敏度分析.
主要成果:
- 在许多场景中,由于TMDD,组织中药物度显著减少.
- 血度的影响不那么明显,特别是在较小,不太透的器官中.
- 药物向复合体的内部化和分布可能是限制速度的,可能导致仅从血数据中过度预测局部度.
结论:
- 组织TMDD显著影响局部药物度和位占用,无论血的药物动力学线性.
- 准确预测药物处置需要考虑组织水平的TMDD,特别是针对组织表达分子的药物.
- 药物特异性参数对TMDD具有重要影响,需要在药物动力学建模中进行仔细评估.
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