Tracking Hepatic Ischemia-Reperfusion Injury in Real Time with a Reversible NIR-IIb Fluorescent Redox Probe

摘要

Hepatic ischemia-reperfusion injury (HIRI) is responsible for liver dysfunction, which involves reactive oxygen species (ROS) as the most critical marker. Realtime monitoring of ROS during HIRI can provide significant chance for early diagnosis and timely intervention. However, there is no probe available to track ROS fluctuationes during HIRI in vivo, as it is extremely challenging to design reversibly responsive fluorescent probe in near-infrared region. Here, a reversible redox probe REPOMs emitting beyond 1500 nm is proposed to fill the blank, using rare earth ions-doped nano-particles as emitter, and molybdenum-based polyoxome-talate nanoclusters as the ROS-recognition site and emission modulator. REPOMs exhibited excellent response towards the repeated cycle between ROS and glutathione, based on which the time-resolved ROS changes during HIRI were successfully obtained. This reversible probe may provide a powerful tool to promote the hepatology research in the future.