在体外选择具有对神经Y的亲和力的体,使用毛细血管电泳
Shaun D Mendonsa1, Michael T Bowser
1Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, USA.
Journal of the American Chemical Society
|June 30, 2005
概括
这项研究成功地开发了用于神经Y (NPY) 的吸收体,使用毛细管电泳-通过指数式丰富 (CE-SELEX) 来系统地进化连接体. 这种方法即使胺体比小的NPY标分子大,也有效.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 分析化学 分析化学
背景情况:
- 毛细电泳-通过指数式丰富 (CE-SELEX) 系统地演化连接体,是一种强大的体选择技术.
- 对于CE-SELEX的一个主要局限性是,在目标绑定时需要显著的移动转移,这使得它对小目标具有挑战性.
- 使用CE-SELEX选择像神经Y (NPY) 这样的小分子的aptamers的可行性以前没有得到证实.
研究的目的:
- 使用CE-SELEX技术开发能够与神经Y (NPY) 结合的体.
- 为了证明CE-SELEX在选择体对比体本身小的标的有效性.
- 评估针对相关的选定体的特异性.
主要方法:
- 通过指数式丰富 (CE-SELEX) 采用了毛细管电泳-连接体的系统演化.
- 对神经Y (NPY) 进行了选择,这是一个36-氨基酸.
- 分离常数和特异性通过结合试验确定.
主要成果:
- 在四轮CE-SELEX后,具有300-1000nM的解离常数的aptamers成功地被选择.
- 选择的体表现出对NPY的高特异性.
- 对NPY的选择性达到了42倍,超过结构相似的类人胰腺多 (hPP).
结论:
- 通过CE-SELEX,可以有效地选择对像NPY这样的小蛋白标的阿马,克服了以前的局限性.
- 开发的NPY胺体具有很高的亲和力和特异性,适合潜在的诊断或治疗应用.
- 这项研究将CE-SELEX的适用性扩展到更广泛的分子点.
相关概念视频
01:20Electrophoresis: Overview
Electrophoresis is a powerful analytical separation technique that relies on the differential migration of charged species when subjected to an electric field. The core strength of electrophoresis lies in its ability to separate high-molecular-weight species in complex mixtures. It has found widespread use in biochemistry, molecular biology, and analytical chemistry, allowing the separation of compounds like amino acids, nucleotides, carbohydrates, and proteins with excellent resolution.
There...
There...
01:20Capillary Electrophoresis: Instrumentation
Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
01:30Capillary Electrophoresis: Applications
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...