Preparation of a two-photon fluorescent probe for imaging H2O2 in lysosomes in living cells and tissues

Abstract

Hydrogen peroxide (H2O2) plays important roles in many physiological and pathological processes. At the cellular organelle level, the abnormal concentrations of H2O2 in the lysosomes may cause redox imbalance and the loss of the critical functions of the lysosomes. Herein, we describe the preparation of a potent lysosome-targeted two-photon fluorescent probe (Lyso-HP) for the detection of H2O2 in the lysosomes in the living cells. This unique fluorescent probe can also be employed to effectively detect H2O2 in the living tissues using two-photon fluorescence microscopy.