作为人类单克隆抗体清除和生物可用性的预测模型的老鼠
Jason D Robarge1, Kevin M Budge1, Lucy Her1
1Eli Lilly and Company, Lilly Corporate Center Indianapolis, Indianapolis, IN 46285, USA.
Antibodies (Basel, Switzerland)
|January 23, 2025
概括
鼠标模型有效预测人类单克隆抗体 (mAb) 药理动力学,包括皮下生物可用性. 这为治疗性抗体发现提供了早期的,具有成本效益的评估,优于其他临床前模型.
科学领域:
- 药理动力学 药理动力学
- 药物开发 药物开发
- 单克隆抗体治疗药物 治疗药物
背景情况:
- 预测单克隆抗体 (mAbs) 的人类清除 (CL) 和皮下 (SC) 生物可用性对于临床开发至关重要.
- 子是人类CL预测的既定模型,但其他临床前物种的探索较少.
- 在人类中预测mAbs的SC生物可用性是具有挑战性的,因为人们对这些因素的理解不足,缺乏系统的临床前模型评估.
研究的目的:
- 评估大鼠和Cynomolgus子模型对预测人类单克隆抗体 (mAb) 药理动力学 (PK) 的有用性.
- 评估mAbs.的临床前和人类SC生物可用性之间的相关性.
- 确定大鼠模型在药物发现中早期评估mAb PK特性时的价值.
主要方法:
- 从公共和内部来源收集了老鼠,Cynomolgus和人类的非临床和临床PK数据.
- 在Sprague Dawley大鼠中确定了IV和SC PK,用于缺乏现有PK数据的14 mAbs.
- 分析了25mAbs的跨物种数据,以确定大鼠,和人类的CL和SC生物可用性之间的关系.
主要成果:
- 鼠和子的CL与人类的CL有显著的相关性,支持特定物种的全米缩放.
- 鼠的SC生物利用率与人类的SC生物利用率有显著的相关性,与子的SC生物利用率不同.
- 发现单克隆抗体的生物可用性与清除相关.
结论:
- 鼠标模型提供了对mAb PK特性的有效早期评估,有助于选择候选药物.
- 鼠的SC生物利用率与人类的SC生物利用率有显著的相关性,这一发现在其他物种中没有观察到.
- 在治疗性抗体发现中,老鼠为临床前PK预测提供了与子相比具有成本效益和效率的替代品.
相关概念视频
Physiological Pharmacokinetic Models: Assumption with Protein Binding
30
Physiological models with protein binding in pharmacokinetics offer a sophisticated approach to understanding drug disposition. These models consider drug-protein interactions, enabling them to effectively predict drug concentrations in different organs and tissues. This precision aids in accurate drug dosing, providing a significant advantage over conventional models. A key process within these models is equilibration, which ensures that drug concentrations achieve a steady state within the...
30
Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance
26
Drug transporters are critical in drug absorption, distribution, and excretion processes. They should be included in physiological-based pharmacokinetic (PBPK) models, which help predict human drug disposition. However, predicting this is challenging during drug development, especially when liver transport is involved. However, with a realistic representation of body transport processes, an accurate model may be possible.
A recent model describes pravastatin's hepatobiliary excretion,...
A recent model describes pravastatin's hepatobiliary excretion,...
26
Clearance Models: Noncompartmental Models
37
Clearance is a pharmacokinetic parameter traditionally defined by compartment models, signifying the rate at which a drug is expelled from the body. However, a noncompartmental model offers an alternative method for assessing clearance, primarily employing empirical data obtained after administering a single drug dose.
The noncompartmental approach capitalizes on extensive sampling data, correlating the volume of distribution to systemic exposure and the administered dosage. This method enables...
The noncompartmental approach capitalizes on extensive sampling data, correlating the volume of distribution to systemic exposure and the administered dosage. This method enables...
37
Clearance Models: Compartment Models
47
Clearance measures drug elimination from the central compartment, including plasma and highly perfused organs like kidneys and liver. Its calculation varies depending on pharmacokinetic models and administration routes. The one-compartment model, for instance, portrays the pharmacokinetics of polar drugs such as aminoglycoside antibiotics administered intravenously and readily excreted in urine. In this case, clearance is influenced by the terminal rate constant (λz) and the total volume...
47
Hepatic Drug Clearance: Effect of Protein Binding
145
Hepatic clearance is influenced by protein binding based on the drug's extraction ratio. Drugs with high extraction ratios are considered flow-limited and remain unaffected by protein binding during hepatic clearance. On the other hand, drugs with low extraction ratios may be impacted by plasma protein binding, although the extent of this influence depends on the fraction of the drug bound.
For low-extraction-ratio drugs that are less than 80% protein-bound, minor changes in protein binding...
For low-extraction-ratio drugs that are less than 80% protein-bound, minor changes in protein binding...
145


