基于双排放碳点的粒子内FRET探针用于分析检测人类血红蛋白和分子对接分析
Mengying Zhang1, Yuwei Guan1, Yun Wei1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|November 12, 2025
概括
使用碳点 (CD) 的新型比度光探针能够简单而灵敏地检测人体血红蛋白 (Hb). 这种探测器实现了低检测极限,并成功应用于真实血液样本,为基于Hb的生物传感提供了一种新的方法.
科学领域:
- 生物医学工程 生物医学工程
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 基于碳点 (CD) 的光共振能量转移 (FRET) 探针为生物传感应用提供高灵敏度和生物相容性.
- 现有的FRET探头开发受到复杂的修改和精确的距离调节要求的阻碍.
- 需要简化,高度敏感的探针来检测像人体血红蛋白 (Hb) 这样的生物标志物.
研究的目的:
- 设计和开发一种简单,灵敏的比度光探针,用于检测人体血红蛋白 (Hb).
- 调查开发的Hb.探针的相互作用机制和选择性.
- 为设计基于Hb的新型生物传感器提供参考.
主要方法:
- 使用基于o-phenylenediamine和2,2'-dipicolylamine的光共振能量转移 (FRET) 的比度光探针 (DP-CD) 的设计.
- 使用DP-CDs探针确定Hb的检测极限 (LOD).
- 在真实的人类血液样本中检测Hb探针的应用.
- 通过光反应分析和分子对接模拟来探索相互作用机制.
主要成果:
- 开发的DP-CDs探头实现了Hb的低检测极限,低至1.33nM.
- 该探测器在实际人体血液样本中成功检测Hb的应用.
- 在Hb结合时观察到增强的FRET效应,降低了供体排放 (435 nm) 和增加了接受体排放 (550 nm).
- 与其他蛋白质相比,Hb的分子对接揭示了丰富的相互作用点和显著较低的结合自由能量 (ΔG = -46.94 KJ/mol),证实了探针的选择性.
结论:
- 开发的比度光探针 (DP-CDs) 提供了一种简单,敏感和选择性的方法来检测人类血红蛋白.
- 这项研究阐明了FRET增强机制和分子相互作用,这些相互作用是探针对Hb.的选择性的基础.
- 这项工作为未来基于Hb的生物传感器和诊断工具提供了有价值的设计策略.
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