温度依赖的黄素释放的机械分析从多样乳酸-co-甘油酸) /多样乳酸) 聚合物纳米粒子
Yushi Sunazuka1,2, Keisuke Ueda1, Kenjirou Higashi1
1Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan.
Molecular pharmaceutics
|February 7, 2024
概括
这项研究揭示了聚合物特性如何影响纳米颗粒中的黄素释放. 降低poly (乳糖-co-糖醇酸) 和poly (乳酸) 纳米粒子的玻璃化过渡温度和颗粒大小可以增强药物释放.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 药品制造 药品制造 药品制造
背景情况:
- 聚合物纳米粒子 (NP) 对药物输送系统至关重要.
- 了解这些NP的药物释放机制对于有效的治疗结果至关重要.
- 黄素 (CUR) 是一种强大的治疗剂,通常被封装在NP中.
研究的目的:
- 调查黄素 (CUR) 从多乳-协同甘油酸 (PLGA) 和多乳酸 (PLA) 纳米粒子 (NP) 的温度依赖释放机制.
- 评估聚合物特性,如乳酸:糖分比 (L:G) 和分子量,对NP特征和CUR释放动力学的影响.
- 为了将NP的物理化学特性,包括湿玻璃过渡温度 (Tg) 和粒子大小,与CUR释放行为相关联.
主要方法:
- 纳米沉方法用于制备具有不同聚合物组成的PLGA/PLANP.
- 描述了NP的粒子大小和湿玻璃过渡温度 (Tg).
- 进行了温度依赖的CUR释放研究,并使用数学模型进行了分析.
主要成果:
- 增加聚合物分子重量减少了NP粒子大小.
- NP的湿Tg低于内在聚合物Tg,受水吸收和纳米化影响;较低的L:G比率和分子重量导致Tg减少.
- 随着温度的增加,CUR释放增加,其特点是最初的爆发释放,其次是扩散控制的释放,两者都受到NP湿Tg和粒子大小的显著影响.
结论:
- PLGA/PLA NPs的湿Tg和颗粒大小是初始爆发和扩散控制的CUR释放的关键决定因素.
- 较高的温度和较低的湿Tg/较小的颗粒大小促进了更大的CUR释放.
- 选择合适的PLGA/PLA聚合物对于在特定的应用温度下开发具有所需药物释放特征的NP至关重要.
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