脂质氧化途径在由活性氧物种介导的脂质体载荷释放中的作用
Olga Lem1, Roosa Kekki2, Artturi Koivuniemi2
1Tampere University, Engineering and Natural Science, Materials Science and Environmental Engineering Tampere Finland nikita.durandin@tuni.fi alexandre.efimov@tuni.fi.
Materials advances
|October 24, 2024
概括
活性氧物种 (ROS) 介导的光氧化使药物从脂质体中释放出来. 脂质氧化成化物对于释放大分子至关重要,而氧化程度较低的脂质释放小分子.
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
- 纳米技术纳米技术
背景情况:
- 反应性氧物质 (ROS) 介导的光氧化是一种有前途的策略,用于控制脂质体中的药物释放.
- 虽然对小分子有效,但从ROS敏感脂质体中释放大宏分子的机制尚不清楚.
- 了解脂质氧化对货物释放的影响对于优化药物输送系统至关重要.
研究的目的:
- 阐明从ROS敏感脂质体中释放大宏分子的机制.
- 研究不同脂质氧化状态对货物释放效率的影响.
- 为了将特定的脂质氧化产品与不同大小的分子的释放相关联.
主要方法:
- 利用高性能液体染色学-高分辨率质谱法 (HPLC-HRMS) 来分析氧化脂质.
- 在不同的光照照射时间 (1-9分钟) 下,研究了脂质体中的DOTAP脂质氧化.
- 采用分子动力学模拟来了解膜行为和孔隙形成.
主要成果:
- 短时间的辐射 (1-2分钟) 产生了氧化物和副酒精,促进了小分子 (素) ~90%的释放.
- 经过较长时间的辐射 (9分钟) 产生了化物,使大宏分子 (10-70kDa dextrans) 的释放率达到30%左右.
- 脂质氧化成化物对于孔隙形成和膜破坏至关重要,与氧化物不同,它只增加了小分子的透性.
结论:
- 脂质氧化的程度决定了ROS敏感脂质体释放的分子的大小.
- 化物形成对大宏分子的释放至关重要,而氧化物足以释放小分子.
- 这项研究提供了关键的见解,用于针对特定药物输送应用的ROS敏感脂质体的定制.
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