在时间分辨率的体免疫试验和发光显微镜中,兰坦化物对量子点的共振能量转移
Loïc J Charbonnière1, Niko Hildebrandt, Raymond F Ziessel
1Laboratoire de Chimie Moléculaire, UMR 7509 CNRS, ECPM 25 rue Becquerel, 67087 Strasbourg cedex 02, France. charbonn@chimie.u-strasbg.fr
Journal of the American Chemical Society
|September 28, 2006
概括
这项研究引入了一种时间解析的-免疫试验,使用兰坦化物复合物和量子点来检测高度敏感的生物素-链维丁. 这种新方法实现了皮科莫尔灵敏度,使先进的生物分析应用成为可能.
科学领域:
- 生物化学 生物化学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 开发敏感的生物分析工具对于诊断和研究至关重要.
- 兰化物复合体和量子点为检测提供独特的光物理特性.
研究的目的:
- 开发一种时间解析的-免疫试验 (TR-FIA),使用在兰化物复合体和量子点之间传递共振能量.
- 为了利用生物素-斯特雷普塔维丁识别用于空间近距离和信号生成.
- 量化这个新型试验的灵敏度和能量转移参数.
主要方法:
- 使用欧和兰化物复合物作为能量捐赠者和CdSe/ZnS量子点作为接受者.
- 采用生物涂层量子点 (Biot-QD) 和以兰化物标记的链状维丁 (Ln-strep) 进行生物识别.
- 测量时间分辨率的发光,包括排放灭,敏感化和发光衰变时间.
主要成果:
- 证明了显著的共振能量传输,由供体火和受体敏感化证明.
- 实现了量子点发光衰变时间的1000倍增加,达到微秒状态.
- 量化了生物 - 斯特雷普塔维丁的相关性,灵敏度极限为1.2 pM,并计算出了大Förster半径.
- 在用聚合复合物的显微镜实验中观察到明显的发光变化.
结论:
- 开发的化物-量子点混合系统是TR-FIA和发光显微镜的高度敏感的分析工具.
- 这种方法提供了一个强大的平台来检测具有高灵敏度和特异性的生物相互作用.
- 该方法的灵敏度和可调节的光谱特性对各种生物分析应用具有前景.
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