溶解介质pH值和药物的电离状态对无形固体分散物的释放性能的影响
Anura S Indulkar1, Samantha Alex1, Geoff G Z Zhang1
1Small Molecule CMC Development, Research and Development, AbbVie Inc., North Chicago, IL 60064, United States.
Journal of pharmaceutical sciences
|October 25, 2024
概括
溶解介质的pH显著影响可电离药物的无形固体分散 (ASD). 电离增强药物释放,并允许在ASD中增加药物负载,改善口服生物可用性.
科学领域:
- 制药科学 制药科学
- 材料科学 材料科学 材料科学
- 药物运输 药物运输 药物运输
背景情况:
- 无形固体分散 (ASD) 增强了难溶性药物的口服生物可用性.
- 基于聚烯烯酸乙烯 (PVPVA) 的ASD在低药物负载下表现最佳.
- 一致性极限 (LoC) 定义了药物负载,在此以上释放下降.
研究的目的:
- 研究溶解环境pH对可电离药物ASD释放性能的影响.
- 评估药物电离在克服自闭症的相称性极限中的作用.
- 了解自闭症的pH依赖溶解行为背后的机制.
主要方法:
- 阿塔萨纳维尔 (ATZ) 是一种较弱的基本药物,用PVPVA配制成ASD.
- 使用伍德的仪器测量了溶解速率,其pH值范围为1至6.8.
- 药物电离状态通过改变溶解介质的pH值来控制.
主要成果:
- 在pH 6.8 (联合ATZ) 时,释放量明显降低至6%以上的药物负载.
- 在pH1-3 (有离子的ATZ) 时,溶解速度更快,在较高的药物负载下保持释放 (在pH2时高达30%).
- 在较低的pH值下增强的溶解被归因于电离化的ATZ-PVPVA相的形成,增加了水友性和可混合性.
结论:
- 药物电离是提高ASD溶解性能和药物负载的关键因素.
- 电离药聚合物相的形成可以改善ASD的稳定性和溶解.
- 这项研究展示了一种战略,通过控制环境pH,在ASD中实现高药物负载和完全释放可电离药物.
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