%0 Journal Article
%T Dual NIR-channel fluorescent probe for detecting ONOO- in vitro and vivo.
%A Hou X
%A Xue Y
%A Liu C
%A Li Z
%A Xu Z
%J Spectrochim Acta A Mol Biomol Spectrosc
%V 320
%N 0
%D 2024 Nov 5
%M 38897059
%F 4.831
%R 10.1016/j.saa.2024.124665
%X As one of endogenous reactive oxygen species (ROS), peroxynitrite (ONOO-) performs various functions in both pathological and physiological mechanisms. In this work, an optical and near-infrared (NIR) fluorescent probe (NX), which based on 3-dihydro-1H-xanthene and 2-dicyanomethylene-3-cyano-4,5,5-trimethyl-2,5-dihydrofuran (TCF) group was designed and prepared to detect ONOO-. This probe revealed an obvious optical and a fluorescent response when ONOO- was present and it exhibited higher selectivity over other ROS. Especially, the dual NIR fluorescence changes at 660 and 800 nm allowed quantitative detection of ONOO- in the range of 15-40 μM, and the detection limit was 82 nM. Finally, the probe was effectively employed to visualize exogenous and endogenous ONOO- in HepG2 cells and zebrafish, respectively. All the results indicated the dual NIR-channel probe could serve as a potent detecting tools in studying ONOO- in vitro and in vivo.