Fluorescein-Based Chromogenic and Ratiometric Fluorescence Probe for Highly Selective Detection of Cysteine and Its Application in Bioimaging
作者:Zhen-Hai Fu、Xiao Han、Yongliang Shao、Jianguo Fang、Zhi-Hong Zhang、Ya-Wen Wang、Yu Peng
DOI:10.1021/acs.analchem.6b04431
日期:2017.2.7
A dual mode fluorescent probe, which is based on an integration of fluorescein and coumarin fluorophores, was developed for the discrimination of Cys from Hcy and GSH. This probe (2) shows the advantage of quick reaction (5 min) with Cys, resulting in a strong fluorescence turn-on response when excited at 450 nm. Notably, it also demonstrates the ratiometric fluorescence property while excited by a
开发了一种基于荧光素和香豆素荧光团整合的双模式荧光探针,用于区分Hys和GSH中的Cys。该探针(2)显示了与Cys快速反应(5分钟)的优势,当在450 nm激发时,产生了很强的荧光开启响应。值得注意的是,它还展示了在较短波长(332 nm)激发下的比例荧光特性。所有结果表明,即使在存在其他氨基酸,阳离子和阴离子的情况下,探针2对Cys的选择性也很高。半胱氨酸的检出限经计算为0.084μM,远低于细胞内浓度。1个用1 H NMR,MS和DFT计算进一步揭示了检测机理。最后,这种低细胞毒性探针已成功应用于HepG2细胞内的生物成像。