在中消除工程纳米颗粒的电荷障碍
Yingyu Huang1, Mengxiao Yu1, Jie Zheng1
1Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX 75080.
概括
纳米颗粒的脏过是临床使用的关键. 带电纳米颗粒面临的壁垒在靠近的管道和毛细血管,而不是质细胞,由于特定的表面相互作用,指导纳米医药设计.
科学领域:
- 纳米医学是一种纳米医学.
- 脏生理学 脏生理学
- 生物材料科学 生物材料科学
背景情况:
- 脏清除对于纳米粒子的安全性和有效性至关重要.
- 纳米粒子大小会影响膜过,但电荷效应尚不清楚.
- 了解脏障碍对于有针对性的纳米医学开发至关重要.
研究的目的:
- 研究纳米粒子电荷在运输中的作用.
- 为了识别影响充电纳米粒子分布的障碍.
- 为了告知脏向纳米药物的设计.
主要方法:
- 通过静脉注射使用不同表面电荷的工程黄金纳米粒子 (AuNPs).
- 多模式成像用于跟踪部件中的AuNP分布和保留.
- 对纳米粒子与近接管道和周周毛细血管相互作用的分析.
主要成果:
- 靠近管道和周周毛细血管作为主要电荷屏障.
- 邻近管道中的AuNP保留取决于库伦比相互作用,而不是泽塔潜力.
- 增强的正电荷增加了对外毛细血管的结合,减缓了球通过.
结论:
- 脏纳米粒子运输由近道管和周管毛细血管电荷屏障控制.
- 表面电荷相互作用,而不仅仅是泽塔电位,决定了保留.
- 这些发现为设计向脏纳米药物用于治疗脏疾病提供了基础.
相关概念视频
Drug Elimination by Renal Route: Tubular Reabsorption
3.4K
During the process of renal excretion, as the glomerular filtrate progresses to the distal convoluted tubule (DCT), drugs that are highly permeable, lipophilic, and nonionized undergo passive reabsorption from the tubular fluid into the surrounding peritubular capillaries. This reabsorption process restricts their elimination through the kidneys. However, the majority of drugs are either weak acids or weak bases, and their ionization level is dependent on pH. By altering the pH of urine, the...
3.4K
Drug Elimination by Renal Route: Tubular Secretion
2.3K
Once the process of glomerular filtration is completed, blood carrying unfiltered drug molecules traverses through efferent arterioles and makes its way into the peritubular capillaries in the proximal tubule. A variety of carriers play a pivotal role in actively secreting drugs from these peritubular capillaries into the tubular fluid. The organic anion transporter transfers acidic drugs, against an electrochemical gradient, from the peritubular capillaries into the renal tubule cells and...
2.3K
Drug Elimination by Renal Route: Glomerular Filtration
5.6K
The kidney serves as the primary organ responsible for eliminating drugs and their metabolites from the body. This process, known as renal elimination, starts with glomerular filtration and results in urine formation. Each kidney houses millions of functional units called nephrons, where urine production takes place. A nephron has two main components: a renal corpuscle and a renal tubule. Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent...
5.6K
Renal Drug Excretion: Tubular Reabsorption
166
Tubular reabsorption, a process occurring post-glomerular filtration of drugs in the renal tubule, is a critical determinant of drug half-life. During the process of renal excretion, as the glomerular filtrate progresses to the distal convoluted tubule (DCT), drugs that are highly permeable, lipophilic, and nonionized undergo passive reabsorption from the tubular fluid into the surrounding peritubular capillaries. This reabsorption process restricts their elimination through the kidneys. This...
166
Renal Drug Excretion: Glomerular Filtration
251
The kidney serves as the primary organ responsible for eliminating drugs and their metabolites from the body. This process, known as renal elimination, starts with glomerular filtration and results in urine formation. Each kidney houses millions of functional units called nephrons, where urine production occurs. A nephron has two main components: a renal corpuscle and a renal tubule.
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
251
Renal Drug Excretion: Overview
148
As primary excretory organs, the kidneys maintain homeostasis by removing waste substances from the bloodstream. They comprise over a million units called nephrons, which serve as the kidney's functional units.
A nephron consists of two primary structures: the renal corpuscle and the renal tubule. The renal corpuscle contains the glomerulus, a network of capillaries where the first step of renal excretion, glomerular filtration, occurs. Blood pressure forces water, ions, and small molecules...
A nephron consists of two primary structures: the renal corpuscle and the renal tubule. The renal corpuscle contains the glomerulus, a network of capillaries where the first step of renal excretion, glomerular filtration, occurs. Blood pressure forces water, ions, and small molecules...
148


