探索各种zwitterionic表面修饰对基于脂质的纳米载体的粘液扩散和膜透性的影响
Antonio Spennacchio1,2, Luca Maurice Richter1, Daniel Stengel1
1Department of Pharmaceutical Technology, Institute of Pharmacy, Center for Chemistry and Biomedicine, University of Innsbruck, Innsbruck, Austria.
Drug delivery and translational research
|October 9, 2025
概括
兹威特基表面活性剂结构显著影响脂质纳米乳液的性能. 不同的头组影响稳定性,细胞毒性和细胞吸收,指导制剂用于制药应用.
科学领域:
- 制药科学 制药科学
- 材料科学 材料科学 材料科学
- 生物技术是生物技术.
背景情况:
- 基于脂质的纳米乳液是有前途的药物输送系统.
- 基表面活性剂对于纳米乳液的稳定性和功能至关重要.
- 了解表面活性剂的结构-性质关系是优化纳米乳液的关键.
研究的目的:
- 为了研究六种zwitterionic表面活性剂的结构变化如何影响脂质纳米乳液性能.
- 为了评估不同Zwitterionic头组对纳米乳液稳定性,细胞毒性,粘液扩散和细胞吸收的影响.
- 为了确定纳米级制药配方的最佳zwitterionic表面活性剂.
主要方法:
- 基于脂质的纳米乳液的标准化配方,使用六种不同的zwitterionic表面活性剂.
- 在生物相关介质中评估物理稳定性.
- 使用基于细胞的测定来评估细胞毒性.
- 使用猪粘液模型测量粘液扩散.
- 人类细胞系中细胞吸收的量化.
主要成果:
- 根据zwitterionic表面活性剂结构观察到显著的性能变化.
- 尽管有中度的细胞毒性,但可卡米多烯氧苏塔因显示出良好的粘液扩散和细胞吸收.
- N-dodecylphosphocholine提供了卓越的稳定性和低细胞毒性.
- 劳里尔二甲基胺氧化物提供了稳定性,粘液扩散和细胞吸收的平衡.
- 劳里尔贝他因表现出低细胞毒性,但粘液透和细胞吸收不佳.
结论:
- 兹威特的表面活性剂结构极大地影响了纳米乳液的特性.
- 像n-dodecylphosphocholine和lauryldimethylamine氧化物这样的特定表面活性剂显示出稳定配方具有理想的生物相互作用的前景.
- 这些发现指导了用于先进的纳米级药物输送系统的zwitterionic表面活性剂的选择.
相关概念视频
01:23Factors Affecting Dissolution: Particle Size and Effective Surface Area
1.5K
Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are...
1.5K
01:27Bioavailability Enhancement: Drug Permeability Enhancement
163
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...
163
01:16Bioavailability Enhancement: Drug Solubility Enhancement
194
Body:Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
194
01:20Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
475
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...
475
01:17Passive Diffusion: Overview and Kinetics
1.2K
Passive diffusion is a critical process that allows small lipophilic drugs to cross the cell membrane along a concentration gradient. This mechanism's efficiency depends on four primary factors: the membrane's surface area, the drug's lipid-water partition coefficient, the concentration gradient, and the membrane's thickness.
When administered orally, drugs establish a substantial concentration gradient between the gastrointestinal (GI) lumen and the bloodstream, expediting...
When administered orally, drugs establish a substantial concentration gradient between the gastrointestinal (GI) lumen and the bloodstream, expediting...
1.2K
01:21Factors Affecting Dissolution: Drug pKa, Lipophilicity and GI pH
3.0K
Drug absorption within the gastrointestinal (GI) tract is a complex process influenced by several critical factors, including the site pH, the drug's dissociation constant (pKa), and the drug's lipophilicity. The GI tract exhibits a pH gradient, with an acidic environment in the stomach and a more alkaline environment in the small intestine. This pH variation directly affects the ionization state of drugs.
A drug's pKa and the pH of the gastrointestinal (GI) tract play crucial roles...
A drug's pKa and the pH of the gastrointestinal (GI) tract play crucial roles...
3.0K