A Facile, Versatile, and Highly Efficient Strategy for Peroxynitrite Bioimaging Enabled by Formamide Deformylation
作者:Xilei Xie、Guangzhao Liu、Xingxing Su、Yong Li、Yawen Liu、Xiaoyun Jiao、Xu Wang、Bo Tang
DOI:10.1021/acs.analchem.9b01175
日期:2019.5.21
Peroxynitrite (ONOO–) is attracting increasing attention due to its involvement in multiple facets of pathophysiological processes. However, ONOO– bioimaging is still challenging due to (1) the lack of highly specific reaction triggers, (2) the tedious and low-yielding synthesis of current sophisticated probes, and (3) the lack of availability of a versatile chemical strategy. To address these challenges, on the basis of amine formylation/deformylation chemistry, we have developed a novel strategy for ONOO– bioimaging. As proof of principle, we designed, synthesized, and evaluated four novel fluorescent probes equipped with the formamide functionality. Although they feature distinctly different fluorophore classes, all probes can be synthesized in one step in high yields and exhibit particularly specific, highly sensitive, and rapid responses to ONOO–. The bioimaging capability is well demonstrated by successfully visualizing ONOO– fluctuation in live cells and major organs of mice suffering from paraquat poisoning. The proposed strategy has proved to be a facile, versatile, and highly efficient methodology for ONOO– visualization, which will greatly facilitate ONOO– biochemistry and pathophysiology.
过氧亚硝酸盐(ONOO–)因其在病理生理过程中的多重作用而越来越受到关注。然而,由于(1)缺乏高特异性的反应触发剂,(2)目前复杂探针的合成过程繁琐且产率低,以及(3)缺乏通用的化学策略,ONOO–生物成像仍然面临挑战。为了解决这些问题,我们基于胺的甲酰化/去甲酰化化学,开发了一种用于ONOO–生物成像的新策略。作为原理的证明,我们设计、合成并评估了四种具有甲酰胺功能的荧光探针。尽管它们具有明显不同的荧光团类别,但所有探针均可在一步内高产率合成,并对ONOO–表现出特别特异、高灵敏和快速的响应。通过成功可视化因巴拉克毒素中毒的小鼠活细胞和主要器官中的ONOO–波动,生物成像能力得到了良好的验证。所提出的策略已证明是一种简单、多功能且高效的ONOO–可视化方法,将极大推动ONOO–生物化学和病理生理学的发展。