Multicolor Activatable Raman Probes for Simultaneous Detection of Plural Enzyme Activities
作者:Hiroyoshi Fujioka、Jingwen Shou、Ryosuke Kojima、Yasuteru Urano、Yasuyuki Ozeki、Mako Kamiya
DOI:10.1021/jacs.0c09200
日期:2020.12.9
Raman probes based on alkyne or nitrile tags hold promise for highly multiplexed imaging. However, sensing of enzyme activities with Raman probes is difficult because few mechanisms are available to modulate the vibrational response. Here we present a general strategy to prepare activatable Raman probes that show enhanced Raman signals due to electronic preresonance (EPR) upon reaction with enzymes
基于炔烃或腈标签的拉曼探针有望用于高度多重成像。然而,用拉曼探针检测酶活性很困难,因为很少有机制可用于调节振动响应。在这里,我们提出了一种制备可激活拉曼探针的一般策略,该探针在生理条件下与酶反应时,由于电子预共振 (EPR) 显示增强的拉曼信号。我们鉴定了一种在 9 位带有腈基的呫吨衍生物 (9CN-JCP) 作为合适的支架染料,并合成了四种可激活的拉曼探针,它们针对不同的酶(三种氨肽酶和一种糖苷酶)并调整到不同的振动通过腈基的同位素编辑频率。我们验证了目标酶对这些探针的拉曼信号的激活,并成功地同时对活细胞中的四种酶活性进行了成像。不同的细胞系显示出这些酶活性的不同模式。