相关实验视频
Updated: Jul 24, 2025

07:58
Nephrotoxin Microinjection in Zebrafish to Model Acute Kidney Injury
Published on: July 17, 2016
8.9K
微生理系统 (MPS) 中吸和毒药物的毒性之间的关系
Ryohei Ueno1,2, Masahiro Kuninori2, Takumi Sumi3
1Department of Micro Engineering, Kyoto University, Kyoto 615-8540, Japan.
Micromachines
|July 8, 2023
概括
微生理系统 (MPS) 提供先进的药物查,但在药物吸附方面面临挑战. 这项研究强调了环烯聚合物 (COP) 作为一种低吸附材料,强调了为准确的药物毒性评估仔细选择粘合剂.
科学领域:
- 生物医学工程 生物医学工程
- 材料科学 材料科学 材料科学
- 药物发现 药物发现 药物发现
背景情况:
- 微生理系统 (MPS) 是先进的微流体设备,模仿人体器官进行药物查.
- 药物吸附到MPS材料上,如聚二甲基 (PDMS) 极大地影响了药物度和毒性评估.
- 环烯聚合物 (COP) 是PDMS的有希望的低吸附替代品,但面临着粘合挑战.
研究的目的:
- 评估MPS材料中的药物吸附和毒性,重点是使用COP开发低吸附系统.
- 为了比较PDMS和MPS中的COP的药物吸附和细胞毒性.
- 确定最佳的材料组合,以在MPS中进行准确的药物查.
主要方法:
- 在PDMS和COP材料上评估了疏水性药物环素A的吸附作用.
- 在基于PDMS和基于COP的MPS中评估药物诱导的细胞毒性.
- 研究了粘合带对药物可用性和细胞毒性的影响.
主要成果:
- 疏水性环素A显著吸附到PDMS上,导致PDMS-MPS中观察到的细胞毒性较低.
- 与PDMS-MPS相比,COP-MPS显示了最小的药物吸附和较高的药物诱导细胞毒性.
- 用于MPS制造的带吸附了大量的药物,减少了药物的可用性并表现出细胞毒性.
结论:
- 对于MPS来说,COP是一种可行的低吸附材料,但其粘合需要仔细考虑.
- 材料选择至关重要:对于基于COP的MPS,建议使用疏水性药物和低细胞毒性结合剂.
- 优化MPS材料成分对于药物发现中准确的药物疗效和毒性预测至关重要.
相关概念视频
Drug Elimination by Renal Route: Tubular Reabsorption
3.5K
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...
3.5K
Drug Elimination by Renal Route: Tubular Secretion
2.5K
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...
2.5K
Renal Drug Excretion: Tubular Reabsorption
226
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...
226
Renal Drug Excretion: Effect of Urine pH, Flow Rate, and Drug pKa
206
The pH of urine, the drug's pKa, and the urine flow rate are vital parameters for drug reabsorption and excretion. Urinary pH varies between 4.6 and 8.0 and is influenced by diet, drug intake, and the patient's pathophysiology. It affects a drug's ionization state and reabsorption. For instance, carbohydrate-rich food produces alkaline urine promoting drug excretion, while proteins and certain medications like ascorbic acid lead to acidic urine enhancing reabsorption.
The pKa of a...
The pKa of a...
206
Toxic Reactions: Overview
1.0K
When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
1.0K
Factors Affecting Renal Clearance: Drug's Physicochemical Properties and Plasma Levels
269
Renal clearance of a drug is influenced by various factors, including its physicochemical properties and plasma levels. These factors play a significant role in determining how efficiently the kidneys eliminate a drug.
One important factor is the drug's molecular size. The kidneys readily excrete smaller molecules below 300 Daltons (Da). On the other hand, molecules weighing between 300 and 500 Da are excreted through both urine and bile. Larger molecules above 500 Da tend to be excreted...
One important factor is the drug's molecular size. The kidneys readily excrete smaller molecules below 300 Daltons (Da). On the other hand, molecules weighing between 300 and 500 Da are excreted through both urine and bile. Larger molecules above 500 Da tend to be excreted...
269

