A ratiometric fluorescence sensor for HOCl based on a FRET platform and application in living cells
2016
Studies showed that the intravascular pH of neutrophils fell to 4.5–5.0 with stimulation for a few minutes. Under this condition, myeloperoxidase was activated to catalyze H2O2 and Cl− to form hypochlorous acid (HOCl). Therefore, it is of significance to develop fluorescence probes for sensing HOCl in acid conditions. In this work, we reported a ratiometric probe CRSH based on a fluorescence resonance energy transfer (FRET) platform for detecting HOCl under acid conditions. Probe CRSH exhibited excellent sensitivity, high selectivity and a rapid response toward HOCl and is suitable for imaging endogenous HOCl in living cells.
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