如何PBPK可以帮助理解老药物,并告知老年人的剂量:阿曼塔丁病例研究
Olha Shuklinova1,2, Sibylle Neuhoff2, Sebastian Polak2,3
1Doctoral School of Medical and Health Sciences, Jagiellonian University Medical College, Kraków, Poland.
Clinical pharmacology and therapeutics
|April 26, 2024
概括
这项研究模拟了老年人群中阿曼塔丁的药理动力学,揭示了脏输送活性下降. 这种理解对于在老年人和特殊人群中安全使用阿曼塔丁剂量至关重要.
科学领域:
- 药理动力学和药物新陈代谢
- 老年人药理学 老年人药理学
- 生理学基础的药理动力学 (PBPK) 建模
背景情况:
- 用于帕金森病和COVID-19的阿曼塔丁,对药物动力学知之甚少,特别是关于脏消除和年龄等共变量的药物动力学.
- 需要了解阿曼塔丁在特殊人群,特别是老年人群中的行为,以确保安全有效的治疗用途.
研究的目的:
- 在健康受试者中机械地描述阿曼塔丁的药理动力学,并比较健康志愿者和老年人群之间的药物行为.
- 利用生理学基础的药理动力学 (PBPK) 建模和模拟来阐明与年龄相关的药理动力学差异.
主要方法:
- 开发一个中间的PBPK模型,包括通过有机阴离子载体 (OCT) 2和多药物和有毒化合物挤出 (MATE) 的脏排泄的机制描述1.
- 模型验证使用来自18项独立研究的血和尿液数据,这些研究涉及健康志愿者和老年患者,经过单次和多次阿曼塔丁剂量后.
- 通过比较预测与观察到的最大血度 (Cmax) 和度-时间曲线 (AUC) 下的面积值来评估模型性能.
主要成果:
- 该PBPK模型准确地预测了阿曼塔丁的药理动力学,预测/观察的Cmax和AUC比率在1.25倍之内.
- 模型模拟表明,健康的老年人与年轻的健康志愿者相比,运输活性 (OCT2) 降低.
- 该模型已成功应用于评估各种老年人年龄组中阿曼塔丁诱导的毒性风险.
结论:
- 开发的PBPK模型为阿曼塔丁的脏排泄及其与年龄相关的变化提供了强大的机制理解.
- 研究结果表明,老年人运输功能下降,需要仔细考虑阿曼塔丁在这个人群中的剂量.
- 这种PBPK方法有助于预测不同年龄组的阿曼塔丁暴露和潜在的毒性风险,支持个性化医疗.
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