经过50年的肝脏清除模型,我们应该从这里走到哪里? 对生理学基础的药理动力学建模的改进和影响
K Sandy Pang1, Weijia Ivy Lu2, Gerard J Mulder2
1Leslie Dan Faculty of Pharmacy, University of Toronto, Ontario, Canada (K.S.P., W.I.L.) and Department of Toxicology, Leiden Academic Centre for Drug Research, Leiden University, The Netherlands (G.J.M.) ks.pang@utoronto.ca.
概括
迷你平行管模型 (miniPTM) 比精心的模型 (WSM) 更好地预测肝脏药物清除. 这个模型模仿了肝脏的血液流动,改善了药物代谢和清除的体内预测.
科学领域:
- 药理动力学和药物新陈代谢
- 生理学基础的药理动力学 (PBPK) 建模
- 肝脏生理学和药物清除情况
背景情况:
- 精心的模型 (WSM) 是广泛用于肝脏药物清除预测由于计算的简单性,尽管它的非生理性质.
- 肝脏的血流本质上是分散的,比WSM更好地用分散模型 (DM) 来表示.
- 目前的模型通常需要在体外扩展到体外扩展,从而引入药物清除预测中的潜在不准确性.
研究的目的:
- 为了比较精心调模型 (WSM),微平行管模型 (miniPTM) 和区域肝脏模型 (ZLMs) 对于肝脏药物清除的预测性能.
- 评估miniPTM的适用性,作为肝脏建模中的分散模型 (DM) 的生理相关替代方案.
- 用不同的肝脏模型评估酶分布和活性对药物清除预测的影响.
主要方法:
- 开发了基于生理学的药理动力学 (PBPK) 模型,其中包括WSM,miniPTM和ZLMs.
- 使用这些模型模拟了harmol的动力学,harmol是一种流量有限的基质.
- 通过比较不同基质度和酶活性的预测肝抽取比率 (E_H) 来评估模型的性能.
主要成果:
- 与miniPTM和ZLM (>0.68) 相比,WSM始终低估了肝脏提取比率 (E_H = 0.5).
- 迷你PTM显示出与分散模型 (DM) 相似的预测模式,涉及E_H,基质度和组织到输出血液度的比率.
- 在miniPTM和ZLM中调整硫化和葡萄化活动导致E_H值升高,与实验观测一致.
结论:
- 迷你PTM,一个三间隔式坦克系列模型,准确地模仿分散模型,并提供优越的肝脏药物清除预测比WSM.
- miniPTM的数学可控性和适应酶区分的能力使其成为肝脏和PBPK建模中WSM的合适替代品.
- 建议采用miniPTM作为生理学相关肝脏建模的新标准,以改善体内药物清除预测.
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