Faster and More Specific: Excited-State Intramolecular Proton Transfer-Based Dyes for High-Fidelity Dynamic Imaging of Lipid Droplets within Cells and Tissues
作者:Gangwei Jiang、Yi Jin、Man Li、Huiling Wang、Mengyao Xiong、Weili Zeng、Hong Yuan、Changlin Liu、Zhuqing Ren、Chunrong Liu
DOI:10.1021/acs.analchem.0c00390
日期:2020.8.4
first class of excited-state intramolecular proton transfer (ESIPT) fluorescence dyes (Flp-(11–13, 19)) for dynamic imaging of LDs based on 3-hydroxyflavone (3HF) derivatives. Flp-(11–13, 19) display strong fluorescence from yellow to NIR in lipid but exhibit almost nonfluorescence in aqueous solution. Besides, they also show large Stokes shifts (>150 nm), narrow absorption and emission peaks, and good
脂质滴(LDs)是一种驻留在细胞脂质存储中心的动态细胞器,已经确定在多种生物过程,代谢紊乱和疾病中起重要作用。发现LD的高动态特性与其生理和病理功能相对应。因此,能够动态跟踪LDs的荧光探针对于更好地了解LDs涉及生物过程和疾病的机制应该非常有帮助。在此,我们以我们所知,介绍了用于基于3-羟基黄酮(3HF)的LDs动态成像的第一类激发态分子内质子转移(ESIPT)荧光染料(Flp-( 11-13,19))衍生品。Flp-(11-13、19)在脂质中显示出从黄色到NIR的强荧光,但在水溶液中几乎不显示荧光。此外,它们还显示出较大的斯托克斯频移(> 150 nm),窄的吸收和发射峰以及良好的油水分离效率,这使其特别针对活细胞和固定细胞中背景噪声极低的LD并对其进行染色。他们以非常低的剂量(低至500 nM)很快(在30 s内)染色细胞内LD。受益于这些优势,Flp-(11-13,19) 已成功