动态质子会极大地影响类似药物分子的膜透性
Zhi Yue1, Chenghan Li1, Gregory A Voth1
1Department of Chemistry, James Frank Institute, and Institute for Biophysical Dynamics , The University of Chicago , Chicago , Illinois 60637 , United States.
通过动态中和更好地了解带电的药物穿透膜. 这项研究揭示了propranolol如何在脂质接口中中和,改善了药物吸收和发育的模型.
科学领域:
- 生物物理
- 计算化学
- 药理学
背景情况:
- 生物膜透性对于药物吸收和发展至关重要.
- 了解充电药物透是有限的, 挑战传统模型.
- 证据表明充电物种可以透膜, 但机制尚不清楚.
研究的目的:
- 在原子层面研究可电离分子的质子合透.
- 评估动态质子对膜透性的影响 (P_m).
- 开发一个修订的pH合分区和透模型.
主要方法:
- 连续恒定的pH分子动力学模拟.
- 自由能量采样技术
- 研究一种微弱基的普拉诺洛 (PPL) 的透性.
主要成果:
- 甲醇 (PPL) 在脂尾界面上动态中和.
- 动态中和显著改变了无透的能量格局.
- 由于忽视动态中和,传统模型高估了内在的透性.
结论:
- 动态质子状态的变化对于电离分子透至关重要.
- 建议修订模型,以更好地描述pH合的分区和透.
- 这些发现需要对药物的膜透标准模型进行修订.
更多相关视频
12:15Single Liposome Measurements for the Study of Proton-Pumping Membrane Enzymes Using Electrochemistry and Fluorescent Microscopy
Published on: February 21, 2019
07:38Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane
Published on: March 30, 2015
相关概念视频
Factors Affecting Drug Distribution: Tissue Permeability
Small molecules with a molecular weight below 500 to 600 Daltons can easily pass through the capillary membrane, gaining access to different tissues. Larger...
Bioavailability Enhancement: Drug Permeability Enhancement
Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
Acid Suppressive Drugs for Peptic Ulcer Disease: Proton Pump Inhibitors
Gastric acid, a potent cocktail of hydrogen and chloride ions, is produced in specialized parietal cells within the...
Cellular Membranes and Drug Transport
Phospholipids arrange themselves into a bilayer, with hydrophilic heads oriented outward and hydrophobic tails facing inward.
The Resting Membrane Potential
