吸入利 propionate 和沙米特醇新酸盐的药用动力学模型,以量化批量对批量的变化
Shuhui Li1, Kairui Feng2, Jieon Lee2
1Center for Translational Medicine, School of Pharmacy, University of Maryland, 20 North Pine Street, Baltimore, Maryland, 21201, USA.
在Advair Diskus (酸/沙米特醇氨基酸) 中的批量变异性会影响仿制药开发. 为了解决这一问题,制造了药理动力学模型,揭示了细颗粒物分数与药物暴露相关,有助于未来的生物等价性研究.
科学领域:
- 药理动力学和药物开发
- 吸入式药物输送系统 吸入式药物输送系统
- 制药科学 制药科学
背景情况:
- 阿德维尔·迪斯库斯 (Advair Diskus) 是一种流动松 propionate (FP) 和沙米特醇新酸 (SX) 的组合,对于喘和COPD的治疗至关重要.
- 在参考列表中的药物 (RLD) 中,大量的分批对分批的药物动力学变化给仿制药的开发带来了挑战.
- 了解和建模这种变异性对于成功的仿制生物等价性 (BE) 研究至关重要.
研究的目的:
- 开发吸入FP和SX的药理动力学 (PK) 模型,以考虑潜在的批量变化.
- 评估RLD批量变异性对生物等价性研究结果的影响.
- 探索吸入性皮质类固醇和长效β-agonists的体外特性和体内PK参数之间的关系.
主要方法:
- 一项4个周期,4个序列的交叉研究,涉及60名健康受试者,每人服用两批参考和测试Advair Diskus (100微克FP/50微克SX).
- 非线性混合效应建模 (NLME) 用于估计每个批次的FP和SX的种群平均PK参数.
- 在实验室中描述颗粒大小分布,重点关注细颗粒分数 (FPF).
主要成果:
- 参考批次 (R1,R2) 之间的生物等价性失败证实了RLD中批次间的高变化.
- 一个具有连续双零顺序吸收的两模型最能描述FP PK,而一个具有第一顺序吸收的两模型适合SX PK.
- 两种模型都充分捕捉了每个批次的血度,Cmax和AUCinf,从而使未来的BE研究模拟成为可能.
- 在较高的微粒分数 (<2μm) 与FP和SX的AUCinf增加之间观察到正相关性.
结论:
- 开发的PK模型有效地代表了吸入FP和SX的批量变异性,这对于通用Advair Diskus开发至关重要.
- 细粒度和AUCinf之间的相关性可以指导PK BE研究的批量选择.
- 通过建模和体外-体外相关性来解决RLD批量变异性是促进通用吸入产品批准的关键.
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