刷式聚乙烯甘醇聚合物与特定脂质的功能化通过与天然脂质贩运途径的结合,延长了它们的消除半衰期
Mohammad Abdallah1, Lihuan Lin1, Ian K Styles1
1Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia.
Acta biomaterialia
|December 12, 2023
概括
将刷毛聚乙烯甘醇 (PEG) 聚合物与脂质相结合会改变它们的药理动力学特性. 脂质结合,特别是与dialkyl脂质和胆固醇,增强与脂质通路的关联,延长治疗半衰期以改善药物输送.
科学领域:
- 生物材料科学 生物材料科学
- 药物输送系统 药物输送系统
- 聚合物化学 聚合物化学
背景情况:
- 聚合物前药物和脂质结合被用于控制治疗输送和延长全身暴露.
- 现有的方法主要集中在控制药物释放和通过蛋白结合延长血半衰期.
研究的目的:
- 为了研究与各种脂质成分的合刷聚乙烯甘醇 (PEG) 聚合物的对血药理学影响.
- 评估这些脂质-PEG合物的整合到内源性脂质贩运途径中,包括白蛋白和脂蛋白.
主要方法:
- 合成的刷PEG聚合物与不同的脂质结合:短链 (1C2),中链 (1C12) 单尾,胆固醇 (Cho) 和二甲基甘油 (2C12,2C18).
- 脂质-PEG合物通过静脉注射 (IV) 和皮下注射 (SC) 给入的老鼠.
- 分析了血的药理动力学,包括消除半衰期和生物可用性.
- 评估了脂质-PEG结合物的与大鼠血清白蛋白 (RSA),牛血清白蛋白 (BSA) 和脂蛋白 (例如HDL) 的相关性.
主要成果:
- 与胆固醇 (Cho-PEG),2C12-PEG和2C18-PEG的脂质-PEG结合物显示,与1C2-PEG和1C12-PEG相比,IV和SC清除半衰期显著延长.
- 1C2-PEG和1C12-PEG表现出比Cho-PEG,2C12-PEG和2C18-PEG (23-25%) 更高的皮下生物利用率 (40-52%).
- 聚合物与专蛋白和脂蛋白的关联模式各不相同,2C18-PEG在高密度脂蛋白 (HDL) 分数中显示出最高的恢复率.
结论:
- 刷PEG聚合物的药理动力学可以通过结合不同的脂质成分来有效调整.
- 脂化通过调节与白蛋白和脂蛋白通路的相互作用来影响消除半衰期,生物分布和治疗疗效.
- 这些脂质聚合物为开发具有量身定制的药物动力学特征的先进药物递送系统提供了多功能平台.
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