Two-Photon, Ratiometric, Quantitative Fluorescent Probe Reveals Fluctuation of Peroxynitrite Regulated by Arginase 1
Shiyu Chen, Beyza Vurusaner, Stephanie Pena, Chu T. Thu, Lara K. Mahal, Edward A. Fisher, James W. Canary
Abstract
Peroxynitrite, a transient reactive oxygen species (ROS), is believed to play a deleterious role in physiological processes. Herein, we report a two-photon ratiometric fluorescent probe that selectively reacts with peroxynitrite yielding a >200-fold change upon reaction. The probe effectively visualized fluctuations in peroxynitrite generation by arginase 1 in vivo and in vitro. This provides evidence that arginase 1 is a critical regulator of peroxynitrite.
Topics & Concepts
PeroxynitriteChemistryFluorescenceArginaseBiophysicsReactive oxygen speciesIn vivoPhotochemistryRegulatorIn vitroReactive nitrogen speciesBiochemistrySuperoxideEnzymeArginineGenePhysicsBiotechnologyAmino acidBiologyQuantum mechanicsNitric Oxide and Endothelin EffectsNeutrophil, Myeloperoxidase and Oxidative MechanismsMolecular Sensors and Ion Detection