优化了测量化学物质与甲状腺激素分发蛋白 transthyretin 和甲状腺素结合球蛋白的竞争性结合的方法
Yang Shen1, Toine F H Bovee2, Douwe Molenaar3
1Wageningen Food Safety Research (WFSR), Wageningen University and Research, Akkermaalsbos 2, 6708 WB, Wageningen, The Netherlands.
Archives of toxicology
|August 21, 2024
概括
对甲状腺激素 (TH) 结合蛋白 transthyretin (TTR) 和甲状腺素结合环球蛋白 (TBG) 进行了新的测定. 这些方法有效地选化学物质,揭示了PFOS和PFOA等化合物的明显结合差异.
科学领域:
- 生物化学 生物化学
- 内分泌学 在内分泌学.
- 毒理学 毒理学 毒理学
背景情况:
- 转激素 (TTR) 和甲状腺素结合型球蛋白 (TBG) 是分发甲状腺激素 (TH) 的关键血蛋白.
- 异生菌对TTR和TBG的结合可以破坏TH的稳态,递送和运输.
- 有效的选方法对于评估与这些蛋白质的化学相互作用至关重要.
研究的目的:
- 开发和验证快速,具有成本效益的测定方法,用于选与TTR和TBG的化学结合.
- 为了比较模型化合物对TTR和TBG的结合特性.
主要方法:
- 优化和预验证一个TTR结合试验.
- 开发一种新的TBG结合试验,利用光极化.
- 在两种测试中测试七种模型化合物,包括对照物.
主要成果:
- 确定了甲状腺素 (T4) 和竞争化合物的解离常数.
- 对于某些化学物质,在TTR和TBG之间观察到结合亲缘关系的显著差异.
- perfluorooctanesulfonic 酸 (PFOS) 和 perfluorooctanoic 酸 (PFOA) 显示出不同的结合模式.
结论:
- 开发的测试提供了有效的工具来评估与TH运输蛋白的异生菌相互作用.
- 像PFOS和PFOA这样的化学物质与TTR和TBG的结合差异凸显了对蛋白质特异性评估的需要.
- 这些方法支持对化学品进行潜在内分泌干扰效应的查.
相关概念视频
Protein-Drug Binding: Determination Methods
146
Determining protein-drug binding can be achieved through indirect and direct methods, each providing valuable insights into the interaction between proteins and drugs.
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...
146
The Equilibrium Binding Constant and Binding Strength
12.8K
The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
12.8K


