来自基于环极德的多态形态复合物的客服药物的受控化率及其与分子动态的相关性,通过固态NMR探测
Sudeshna Kundu1, Kenjirou Higashi1, Makoto Takamizawa1
1Graduate School of Pharmaceutical Sciences, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba 260-8675, Japan.
Molecular pharmaceutics
|February 16, 2024
概括
将酸 (SA) 封装在环氧德克斯/聚乙烯甘醇 (polypseudorotaxane) 复合物中,提高了其物理稳定性. 与升华率直接相关的分子流动性,在不同的多态形式中有所不同,为药物输送系统设计提供了洞察力.
科学领域:
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
- 制药科学 制药科学
背景情况:
- 活性药物成分 (API) 的封装改变了它们的分子动力学和物理性质.
- 由环极素 (CD) 和聚乙烯糖醇 (PEG) 形成的多伪多素 (PPRX) 提供了独特的宿主-客户环境.
- 对于药物输送来说,了解在封闭的超分子结构中的API行为至关重要.
研究的目的:
- 为了研究胺酸 (SA) 的分子动力学和物理稳定性,在不同的多态形式内封装的胺-环氧德素 (γ-CD) /基于PEG的多伪多达 (PPRX) 对分子动力学的影响.
- 为了确定封装SA的分子流动性及其升华倾向之间的相关性.
- 为基于超分子宿主结构的药物递送系统的合理设计提供见解.
主要方法:
- 基于g-CD/PEG的PPRX复合物的三种多态形式 (单临床柱状,六角柱状,四角柱状) 的合成和表征.
- 从每个复合体中测量酸 (SA) 升华率.
- 固态核磁共振 (NMR) 光谱 (C和H MAS) 探测分子动力学和相互作用.
- 确定 C 旋转格的放松时间 (T) 来量化分子运动.
主要成果:
- 在封装后,SA升华率显著下降 (3.0-6.6倍),其速度因多态形式 (MC > HC > TC) 不同.
- 固态NMR表明封装的SA存在于MC < HC < TC顺序中具有增加分子流动性的单体.
- 在SA分子流动性和其升华率之间观察到正相关性,受宿主结构的客驱动动力学影响.
结论:
- 基于g-CD/PEG的PPRX多态结构中的复合增强了SA的物理稳定性,减少了其升华倾向.
- 封装的API的分子流动性是其物理稳定性的关键决定因素,宿主结构多态性起着关键作用.
- 这项研究表明了多态超分子宿主结构在提高API稳定性的潜力,并为先进药物递送系统的设计提供了信息.
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