预测无形固体分散的释放机制:热力学建模和分子模拟的组合
Stefanie Walter1, Paulo G M Mileo2, Mohammad Atif Faiz Afzal3
1AbbVie Deutschland GmbH & Co. KG, Small Molecule CMC Development, Knollstraße, 67061 Ludwigshafen am Rhein, Germany.
调查无形固体分散 (ASD) 显示,药物负载显著影响释放机制和释放损失 (LoR). 结合热力学建模和分子模拟,为优化ASD配方和减少实验测试提供了强大的计算框架.
科学领域:
- 制药科学 制药科学
- 材料科学 材料科学 材料科学
- 计算化学的计算化学
背景情况:
- 无形固体分散 (ASDs) 中的药物负载严重影响溶解,释放机制和释放损失 (LoR).
- 由于药物负载的影响,ASD/水界面凝层的相位行为决定了释放动力学和LoR.
- 液-液相分离 (LLPS) 和在接口处的药物结晶是驱动ASD中LoR的关键转换.
研究的目的:
- 调查药物负载对释放机制和无形固体分散 (ASD) 的LoR的影响.
- 探索ASD/水界面凝层的相位行为及其对药物释放的影响.
- 应用一个结合的计算和实验方法来理解ASD溶解.
主要方法:
- 利用扰乱链统计关联流体理论 (PC-SAFT) 进行热力学建模.
- 在分子模拟中使用,以分析相位分离和分子行为.
- 进行微观侵蚀时间测试 (METT) 用于实验验证相图预测.
主要成果:
- 热力学建模,分子模拟和实验数据是一致的.
- 确定ASD/水相互作用和相分离是溶解和LoR的关键驱动因素,Ritonavir/PVPVA64ASD的药物负载为40 wt%的药物负载.
- 证实了界面凝层中的相分离对于控制药物释放至关重要.
结论:
- 热力学建模,分子模拟和实验研究的综合方法为ASD提供了全面的理解.
- 这种综合方法作为一个计算框架,用于ASD配方的in silico选,设计和优化.
- 开发的框架可以显著减少配方开发所需的实验测试的数量.
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