脂质组成对囊泡蛋白吸附的影响:BSA病例研究
Roxana-Maria Amărandi1,2, Andrei Neamṭu2,3, Rareş-Ionuṭ Ştiufiuc1,4
1Nanotechnology Laboratory, TRANSCEND Research Center, Regional Institute of Oncology, 2-4 General Henri Mathias Berthelot Street, 700483 Iaşi, Romania.
ACS omega
|April 29, 2024
概括
脂质细胞组合显著影响蛋白质吸附. 阴离子DOTAP脂质体结合更多的牛血清白蛋白 (BSA),但也聚合,影响药物输送的纳米载体设计.
科学领域:
- 纳米医学是一种纳米医学.
- 生物物理化学 生物物理化学
- 材料科学 材料科学 材料科学
背景情况:
- 蛋白质对脂质体的吸附对于药物输送效率至关重要.
- 蛋白是最丰富的血蛋白,它迅速吸附到脂质体表面.
- 了解蛋白质 - 囊泡相互作用会影响纳米载体生物分布和治疗结果.
研究的目的:
- 为了全面调查牛血清白蛋白 (BSA) 在脂质体上的吸附.
- 为了比较BSA在由DPPC/CHOL组成的囊泡上的不同吸附率,与DPPC/DOTAP相比.
- 评估脂质体-蛋白质复合体和未结合蛋白质的分离技术.
主要方法:
- 紫外线光谱和SDS-PAGE用于量化蛋白质吸附.
- 动态光散射 (DLS) 和传输电子显微镜 (TEM) 来评估聚合.
- 离心和尺寸排除色谱 (SEC) 用于复杂的分离.
- 粗粒度分子动力学模拟用于膜参数分析.
主要成果:
- 脂质体膜的组成强烈影响蛋白质吸附.
- 含有DOTAP的脂质体表现出更强大的BSA吸附和聚合.
- 在分离未结合的蛋白质方面,尽管脂质损失,SEC比离心更有效.
结论:
- 表面电荷和膜流动性是蛋白质吸附到脂质体上的关键因素.
- 含有DOTAP的脂质体表现出明显的蛋白质结合和聚合行为.
- 对蛋白质 - 囊泡相互作用的更好的理解对于先进的纳米载体开发至关重要.
相关概念视频
01:35Asymmetric Lipid Bilayer
7.2K
Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
7.2K
01:26Membrane Fluidity
11.1K
Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
11.1K
01:28Assembly of the Lipid Bilayer in the ER
3.1K
Biological membranes are more than just a barrier separating cell cytoplasm from the outside environment. They are highly dynamic and help maintain the integrity and physiological stability of the cells as well as membrane-bound organelles. Membranes also play vital roles in cell-to-cell and intracellular communication.
A large chunk of any biological membrane is composed of phospholipids. These lipids have a heterogeneous distribution across different subcellular organelles and even between...
A large chunk of any biological membrane is composed of phospholipids. These lipids have a heterogeneous distribution across different subcellular organelles and even between...
3.1K