脂肪酸不和调节了胆汁盐小粒中的阿斯丁封装:洞察自我组装机制和分子相互作用
Qianer Zhu1, Xiaoyan Liu1, Weiqiang Pan1
1Institute of Biomedical Engineering, College of Life Sciences, Qingdao University, Qingdao 266071, Shandong, China.
Journal of colloid and interface science
|September 25, 2025
概括
脂肪酸不和度的程度显著影响了基于脂质的输送系统中的阿斯丁 (Asta) 封装. 多不和脂肪酸增强了Asta负载和菌根内稳定性,从而提高了生物可用性.
科学领域:
- 生物物理化学 生物物理化学
- 营养药物输送系统 营养药物输送系统
- 材料科学 材料科学 材料科学
背景情况:
- 阿斯塔桑丁 (Asta) 是一种疏水性胡卜素,由于水溶性较低和肠道吸收有限,因此具有较差的生物利用性.
- 基于脂质的输送系统,特别是由脂肪酸 (FFAs) 和胆盐 (BS) 形成的混合,可以增强阿斯塔的吸收.
- 脂肪酸不和在调节这些细胞系统内的阿斯塔封装中的作用仍然不完全理解.
研究的目的:
- 系统地调查脂肪酸 (FFA) 不和程度如何影响胆汁盐 (BS) 微粒内的阿斯塔山丁 (Asta) 封装.
- 阐明控制阿斯塔-FFA-BS相互作用和细胞结构的基本机制.
- 为优化基于脂质的纳米载体提供一种机械基础,以改善脂友营养药的输送.
主要方法:
- 使用不同程度的FFA不和 (油性,亚麻酸,亚麻酸) 的二元 (FFA-BS) 和三元 (FFA-BS-Asta) 微粒模型的形成和表征.
- 异热定位热度计 (ITC) 用于评估结合亲和力和化热力学.
- 谱学技术 (循环二元化,拉曼谱学) 和石英晶体微平衡与消散 (QCM-D) 用于分析状结构,界面特性和分子相互作用.
- 分子动力学 (MD) 模拟以可视化封装动力学和负载能力.
主要成果:
- 脂肪酸扩大了BS菌根的疏水核,增强了稳定性,但没有改变球形态.
- 多不和FFAs表现出更高的结合亲和力到BS,由静电相互作用驱动.
- 光谱和QCM-D分析显示,Asta和不和FFAs之间增强了结和疏水相互作用,导致分子包装更紧密,并增加了界面稳定性.
- 模拟MD显示更快的Asta封装和更高的负载能力在林酸粒,与增加的键形成相关.
结论:
- FFA不和度的程度是FFA-BS系统中细胞结构和界面相互作用的关键决定因素.
- 增强的FFA不和促进了与Asta的更强的相互作用,促进了微细胞内的更好的封装和分子包装.
- 这些发现为设计先进的胆汁盐-脂质纳米载体提供了关键的机制理解,以提高像阿斯塔克桑丁这样的疏水性营养品的生物可用性.
相关概念视频
Biosynthesis of Lipids
531
Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis...
531
Assembly of the Lipid Bilayer in the ER
4.0K
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...
4.0K
Membrane Fluidity
173.0K
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
173.0K
Bioavailability Enhancement: Drug Permeability Enhancement
186
Body:After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt...
186
Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
505
Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
505
Asymmetric Lipid Bilayer
9.6K
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%...
9.6K


