通过时间-温度转换了解无形固体分散中核化的效应
Rahul Lalge1, N S Krishna Kumar1, Raj Suryanarayanan1
1Department of Pharmaceutics, College of Pharmacy, University of Minnesota, 9-177 WDH, 308 Harvard Street S.E., Minneapolis, Minnesota 55455, United States.
Molecular pharmaceutics
|June 26, 2023
概括
这项研究确定了预防尼菲迪平 (NIF) 无形固体分散 (ASD) 核化的临界冷却速率. 聚烯利 (PVP) 和基烯基甲基纤维素酸盐酸盐 (HPMCAS) 聚合物影响了核化速率,而PVP显示出更强的相互作用.
科学领域:
- 制药科学 制药科学
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
背景情况:
- 无形固体分散 (ASD) 对于提高药物的溶解性和生物可用性至关重要.
- 控制自闭症患者的药物结晶对于维持其无形状态和治疗疗效至关重要.
- 之前的工作确定了临界冷却速率 (CRcrit) 以使用时间温度转换 (TTT) 图来防止尼菲迪平 (NIF) 在ASD中的结晶.
研究的目的:
- 在ASD准备过程中确定关键冷却速率以防止药物核化 (CRcrit N).
- 为了研究聚合物类型 (聚烯 - PVP,基甲基纤维素酸盐 - HPMCAS) 和度对核化的影响.
- 为了生成TTT图,专门用于NIF ASDs的核化动力学.
主要方法:
- 用不同的聚合物 (PVP,HPMCAS) 制备NIF ASD.
- 在促进核形成的条件下储存分散物,然后加热以诱导结晶.
- 使用差分扫描热度计 (DSC) 和同步射线X射线衍光计 (XRD) 确定结晶开始时间 (tC).
- 为核化动力学生成TTT图形.
主要成果:
- 成功生成了核化TTT图,确定了50°C的临界核化温度.
- 为了避免核化 (CRcrit N) 的临界冷却速率被确定为NIF ASDs.
- 药物聚合物相互作用强度和聚合物度显著影响了CRcrit N. PVP表现出比HPMCAS更强烈的相互作用.
- 无形NIF的CRcrit大约为17.5°C/分钟.
- 在20%重/重聚合物中,CRcrit值为~0.05°C/分钟 (PVP) 和~0.2°C/分钟 (HPMCAS).
- 相应的CRcrit N值为4.1°C/分钟 (PVP) 和8.1°C/分钟 (HPMCAS).
结论:
- 该研究成功地建立了一种方法来确定使用TTT图的NIF ASDs中预防核形成的临界冷却速率.
- 聚合物选择 (PVP与HPMCAS) 和度是控制NIF核化动态的关键因素.
- 了解和控制核化速率对于成功制定稳定的无形固体分散是必不可少的.
关键词:
无形固体分散的无形固体分散结晶化 结晶化的过程.药物 - 聚合物相互作用热挤出方式基甲基纤维素酸盐顺酸 (HPMCAS) 是一种尼菲迪平因 (nifedipine) 是一种尼菲迪平因 (nifedipine) 的一种药物.核化的核化.聚乙烯罗利 (PVP) 是一种聚乙烯.时间-温度转换的转换.更多相关视频
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