Dual-Color Visualization of Hepatic Fibrosis and Multidimensional Assessment of Therapeutic Drugs by a Multifunctional Single-Molecular Fluorescent Probe

There is a high relevance between changes in ClO^- levels/mitochondrial morphology and the development of hepatic fibrosis; however, the efficient tools that are capable of real-time monitoring both of them and exploring their interrelations are extremely rare. Herein, we developed a multifunctional fluorescent probe based on a "three-in-one" strategy, named <b>Mito-XS</b>, which is firmly anchored in mitochondria, allowing for the ratiometric detection of ClO^- and the accurate analysis of mitochondrial morphology. Probe <b>Mito-XS</b> can sensitively capture the changes of ClO^- levels in mitochondria and successfully achieve simultaneous real-time monitoring of ClO^- levels and mitochondrial morphology during oxidative stress. Utilizing probe <b>Mito-XS</b>, the evaluations of three therapeutic drugs (silymarin, methyl ferulic acid, and puerarin) on protecting cells from CCl₄-induced damage were visualized by assessing their capabilities of inhibiting ClO^- levels and maintaining mitochondrial morphology. Furthermore, dual-color imaging in hepatic fibrosis mice models revealed the exacerbation of hepatic fibrosis, and the therapeutic effect of puerarin can be tracked by the fluctuation of ClO^- levels. Therefore, probe <b>Mito-XS</b> is an effective imaging tool to monitor mitochondrial morphology and ClO^- levels at the same time and has the potential to work as an evaluation tool to screen therapeutic drugs for hepatic fibrosis treatment.