可调节的阿普坦分子毛细电泳及其对蛋白质分析的应用
Hongquan Zhang1, Xing-Fang Li, X Chris Le
1Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada T6G 2G3.
Journal of the American Chemical Society
|December 13, 2007
概括
这项研究引入了一种可调节的aptamer试验,用于使用毛细血管电泳检测高度敏感的蛋白质. 该方法允许在人类血清中同时识别多种蛋白质及其异构体.
科学领域:
- 生物化学 生物化学
- 分析化学 分析化学
- 分子生物学分子生物学
背景情况:
- 精确的蛋白质检测对于疾病诊断和生物标志物开发至关重要.
- 现有的蛋白质检测方法往往在灵敏度,特异性或多重化能力方面面临限制.
- 由于其稳定性和易于修改,DNA 体为抗体提供了一个有希望的替代品,作为识别元素.
研究的目的:
- 开发一种用于蛋白质检测的新型,高度敏感和多重测试方法.
- 为了利用DNA吸收体作为可调节的元素,用于蛋白质的电泳分离和光检测.
- 为了证明该试验在复杂的生物样本 (如人体血清) 中发现生物标志物的潜力.
主要方法:
- 开发一种可调节的基于aptamer的测定方法,整合毛细血管电泳 (CE) 和激光诱导光 (LIF) 检测.
- 设计具有不同核酸长度的光标记DNA体,以调节蛋白质电泳性移动性,并作为亲和力探针.
- 使用开发的aptamer-CE-LIF系统,同时分离和检测多个标蛋白及其异构体.
主要成果:
- 实现了对多种蛋白质和蛋白质异构体的高度敏感的光检测.
- 证明了同时确定目标蛋白质的皮科莫拉 (pM) 水平,包括人体免疫缺陷病毒逆转录酶,血栓素,人体免疫球蛋白E和两个血小板衍生的生生长因子异构体.
- 成功地应用了测试来分析稀释的人体血清中的蛋白质,展示了其实际实用性.
结论:
- 可调节的aptamer电泳测试为超敏感,同时检测多种蛋白质和同位素提供了一个强大的平台.
- 这种测试具有很大的潜力,可以促进生物标志物开发和诊断,特别是在复杂的生物矩阵中.
- 与CE和LIF集成的阿普坦体为高性能分子分析提供了一种多功能方法.
相关概念视频
Capillary 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,...
Capillary 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...
Electrophoresis: 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...

