Ultrasound Trigger Ce-Based MOF Nanoenzyme For Efficient Thrombolytic Therapy
Advanced science (Weinheim, Baden-Wurttemberg, Germany)(2024)
摘要
The inflammatory damage caused by thrombus formation and dissolution can increase the risk of thrombotic complications on top of cell death and organ dysfunction caused by thrombus itself. Therefore, a rapid and precise thrombolytic therapy strategy is in urgent need to effectively dissolve thrombus and resist oxidation simultaneously. In this study, Ce-UiO-66, a cerium-based metal-organic framework (Ce-MOF) with reactive oxygen species (ROS) scavenging properties, encapsulated by low-immunogenic mesenchymal stem cell membrane with inflammation-targeting properties, is used to construct a targeted nanomedicine Ce-UiO-CM. Ce-UiO-CM is applied in combination with external ultrasound stimulation for thrombolytic therapy in rat femoral artery. Ce-UiO-66 has abundant Ce (III)/Ce (IV) coupling sites that react with hydrogen peroxide (H2O2) to produce oxygen, exhibiting catalase (CAT) activity. The multi-cavity structure of Ce-UiO-66 can generate electron holes, and its pore channels can act as micro-reactors to further enhance its ROS scavenging capacity. Additionally, the porous structure of Ce-UiO-66 and the oxygen produced by its reaction with H2O2 may enhance the cavitation effects of ultrasound, thereby improving thrombolysis efficacy. An inflammation-targeting nanodrug, Ce-MOF-CM, prepared by coating reactive oxygen species scavenging Ce-UiO-66 with low-immunogenic mesenchymal stem cell membranes, is applied in combination with external ultrasound stimulation for thrombolytic therapy in rat femoral artery. The porous structure of Ce-UiO-66 and the oxygen produced by its reaction with H2O2 may enhance the cavitation effects of ultrasound, thereby improving thrombolysis efficacy. image
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关键词
mesenchymal stem cell membrane,metal-organic framework,nanozyme,reactive oxygen species,thrombolysis
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