使用不同的生理学基础的药理动力学建模平台对单克隆抗体处置预测的比较
Pieter-Jan De Sutter1, Elke Gasthuys2, An Vermeulen2
1Laboratory of Medical Biochemistry and Clinical Analysis, Department of Bioanalysis, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium. pieterjan.desutter@ugent.be.
基于生理学上的药理动力学 (PBPK) 模型显示了跨平台的类似单克隆抗体 (mAb) 血清预测. 然而,组织度预测有显著的差异,强调在模拟mAb组织配置时需要谨慎.
科学领域:
- 药理动力学和药物新陈代谢
- 生物药物和单克隆抗体治疗疗法
- 计算机建模和模拟
背景情况:
- 基于生理学的药理动力学 (PBPK) 模型整合了生理学和体外数据,用于预测单克隆抗体 (mAb) 血清和组织度.
- 跨不同PBPK建模平台的mAb配置预测的一致性仍然没有表征.
研究的目的:
- 在三个PBPK建模平台:Simcyp,PK-Sim和GastroPlus中比较mAb配置预测的一致性.
- 根据文献数据,评估预测血清和组织度的准确性.
- 评估生理和mAb特定输入参数对模型预测的影响.
主要方法:
- 用Simcyp,PK-Sim和GastroPlus进行了IgG,阿达利穆马布和因弗利西马布的PBPK模拟.
- 预测的血清和组织度与文献中观察到的数据进行了比较.
- 进行了灵敏度分析,以评估输入参数变化对模型输出的影响.
主要成果:
- 在低剂量 (1 mg/kg) 时,IgG的血清动力学在不同平台之间显示出极小的差异,但在较高剂量 (>100 mg/kg) 和改变的生理参数时有差异.
- 艾达利马布和因弗力西马布的血清度在不同平台上是可比的,但与观察到的值相比,通常预测过高.
- 在平台之间预测的总和间歇性液体 (ISF) 组织度中观察到显著的差异. 总组织度是观察值的三倍之内,除了脑组织. GastroPlus提供了最准确的ISF度预测.
结论:
- 虽然PBPK平台在预测mAb血清度方面表现出普遍一致,但在组织度预测方面存在相当大的变化.
- 对于模拟mAb组织度的PBPK模型的准确性,特别是在效应部位,由于平台依赖的差异,需要对经验数据进行仔细的验证.
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