长链阴离子双子表面活性剂作为脂质体上的药物保留辅助剂. 与阿托瓦斯塔丁的方法方法方法
Yago Radziunas-Salinas1, Vicente Domínguez-Arca2, Alberto Pardo3
1Applied Physics Department, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain; Institute of Materials (iMATUS), University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
Biochimica et biophysica acta. Biomembranes
|April 5, 2025
概括
双子座表面活性剂增强二甲基酸丁胆 (DPPC) 脂质体,用于在心血管疾病中提供阿托瓦斯塔丁. 这些修改后的脂质体显示出改善的药物保留和稳定性,提供了一个有前途的药物递送平台.
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:
- 阿托瓦斯塔丁的水溶性差,限制了它对心血管疾病的有效性.
- 传统的脂肪体药物递送系统在药物封装和保留方面面临挑战.
- 双子座表面活性剂提供了改善脂质体配方稳定性和药物负载的潜力.
研究的目的:
- 开发和表征含有双子座表面活性剂 (14-14-14) 和阿托瓦斯塔丁的二甲基酸丁胆 (DPPC) 脂质体.
- 评估双子表面活性剂对脂质体特征,药物封装和保留的影响.
- 通过模拟研究双子-表面活性剂-修饰脂质体的分子相互作用和结构动力学.
主要方法:
- 动态光散射 (DLS) 用于粒子大小和多分散性分析.
- 差分扫描热量计 (DSC) 用于热性能和稳定性评估.
- 分子动力学 (MD) 模拟用于理解双层内的药物-表面活性剂-脂质相互作用.
- 谱光测量用于量化阿托瓦斯塔丁封装和保留效率.
主要成果:
- 双子座表面活性剂显著降低了脂质体大小和多分散性,表明结构更加均.
- DSC分析显示过渡温度降低和对称性改变,表明稳定性增强和药物释放有利.
- 医学模拟表明,双子座表面活性剂和阿托瓦斯塔丁通过极性相互作用在脂质体双层内相互结合.
- 与传统的脂质体相比,含有Gemini表面活性剂的脂质体的阿托瓦斯塔丁保留效率几乎是双倍.
结论:
- 结合双子表面活性剂的DPPC脂质体代表了阿托瓦斯塔丁的有前途的先进药物递送系统.
- 这些新型脂质体提供了增强的稳定性,改善了药物保留,并可能为心血管疾病提供更好的治疗结果.
- 这项研究为推动双子座表面活性剂修饰脂质体性能提高的分子机制提供了宝贵的见解.
更多相关视频
相关概念视频
01:20Lipid-Lowering Drugs: Statins and Miscellaneous Agents
475
Hyperlipidemia, a medical condition often referred to as high cholesterol, is characterized by abnormally elevated levels of lipids in the bloodstream. When present in excess, these lipids, specifically cholesterol and triglycerides, can lead to serious health complications, often involving cardiovascular diseases. Illnesses like atherosclerosis, heart attacks, and pancreatitis have all been linked to untreated hyperlipidemia. This means controlling and regulating cholesterol and triglyceride...
475
01:20Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
159
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...
159
01:22Factors Influencing Drug Absorption: Physicochemical Parameters
189
The physicochemical characteristics of drugs play a crucial role in formulating stable and bioavailable drug products. The solubility of a drug, governed by the varying pH along the GI tract and its dissociation constant (pKa), is pivotal in determining its ionization state and absorption rate. Notably, weak acids and bases remain unionized and are absorbed more rapidly.
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
189
01:21Factors Affecting Dissolution: Drug pKa, Lipophilicity and GI pH
832
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...
832
01:17Pore Transport and Ion-Pair Transport
316
Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
316
01:23Drug Absorption Mechanism: Passive Membrane Transport
3.3K
Passive transport is a method of drug absorption where small, lipid-soluble drugs can move across the cell membrane. This movement happens along the concentration gradient, which is a natural flow from higher to lower concentration areas. The speed at which the drug moves is directly related to its lipid–water partition coefficient. This means that the more a drug dissolves in lipids, the faster it diffuses or spreads throughout the body. It is important to note that most drugs are either...
3.3K