开发一种基于生理学的多用途综合性药理动力学模型用于crizotinib:口服溶液和小粒之间的生物等价性评估中的示例应用在儿科受试者中
Kazuko Sagawa1, Vivek Purohit2, Vu Le3
1Pharmaceutical Science, Drug Product Design, Pfizer Research and Development, Groton, Connecticut, 06340, U.S.A.. kazuko.sagawa@pfizer.com.
一个新的生理学基础的药理动力学 (PBPK) 模型证实了crizotinib颗粒与成人和儿童 (1-6岁) 的口服溶液具有生物等价性. 这种PBPK模型准确地预测了crizotinib配方的药物吸收和代谢.
科学领域:
- 药理动力学 药理动力学
- 药物代谢和药物相互作用
- 儿科药理学 儿科药理学
背景情况:
- 由于其作为CYP3A4基质,抑制剂和诱导剂的作用,crizotinib具有复杂的药物相互作用.
- 该药物还表现出延长的吸收阶段,使其药理动力学特征复杂化.
- 了解这些复杂性对于优化crizotinib剂量和配方至关重要.
研究的目的:
- 开发一种基于生理学的综合性药理动力学 (PBPK) 模型来描述crizotinib的吸收和代谢.
- 将成人PBPK模型推断到儿科人口 (年龄为1-6岁) 中,使用CYP3A4本体生成.
- 在成人和儿科人群中进行crizotinib配方的虚拟生物等价性 (BE) 试验.
主要方法:
- 开发一个成人PBPK模型用于crizotinib,包括CYP3A4相互作用和吸收特征.
- 通过调整CYP3A4本质生成,将PBPK模型推断到儿科患者群体.
- 模拟虚拟生物等价性试验,比较口服溶液和颗粒配方,包括人内变异性.
主要成果:
- 该PBPK模型准确地预测了成人和儿科受试者的crizotinib药理学.
- 虚拟BE试验表明生物等效的概率很高 (AUCinf为100%,成人为Cmax为90.3%,儿科为99.7%).
- 预计颗粒配方与成人和1-6岁儿童患者的口服溶液具有生物等价性.
结论:
- 开发的PBPK模型为评估crizotinib配方提供了一个强大的平台.
- 在成人和儿科患者 (1-6岁) 中,crizotinib颗粒与口服溶液具有生物等价性.
- PBPK建模是评估药物配方生物等价性的宝贵工具,特别是在儿科患者群体中.
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