A fluorescent probe based on Cu(II) complex induced catalysis for repetitive detection of cysteine
作者:Wenjie Wang、Long Jiang、Wenjing Wang、Yanan Chen、Junqian Peng、Yuanbo Wang、Yanjun Jiao、Yajing Li、Xiaoming Jiang、Sheng Lu、Fang Wang、Xiaoqiang Chen
DOI:10.1016/j.saa.2023.122942
日期:2023.11
distinctive and correspond to a range of processes including Cys induced loss of Cu(II) from Lc-NBD-Cu(II) to form Lc-NBD, Cu(I) oxidation to reform Cu(II), Cys oxidation to form Cys-Cys, Cu(II) binding to Lc-NBD to reform Lc-NBD-Cu(II), and competitive binding of Cu(II) to Cys-Cys. The study also shows that Lc-NBD-Cu(II) maintains high stability during the sensing process and that it can be utilized
活细胞中生物硫醇的实时成像和监测对于了解病理生理过程至关重要。然而,设计对这些目标具有准确且可重复的实时监测能力的荧光探针极具挑战性。在本研究中,我们制备了一种荧光传感器Lc-NBD - Cu(II),其含有 N1, N1, N2-三-(吡啶-2-基甲基)乙烷-1,2-二胺作为 Cu(II)螯合单元和 7-硝基苯甲-2-氧杂-1,3-二唑荧光团来检测半胱氨酸 (Cys)。向该探针中添加 Cys 所促进的发射变化是独特的,并且对应于一系列过程,包括 Cys 诱导的 Cu(II) 从Lc-NBD-Cu(II)损失形成Lc-NBD, Cu(I) 氧化重新形成 Cu(II), Cys 氧化形成 Cys-Cys, Cu(II) 与Lc-NBD结合重新形成Lc-NBD-Cu(II) , 以及 Cu(II) 与 Lc-NBD 竞争性结合半胱氨酸-半胱氨酸。研究还表明,Lc-NBD-Cu(II)在传感过程