Prussian Blue Nanozyme with Multienzyme Activity Reduces Colitis in Mice

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Abstract

The overproduction of reactive oxygen species (ROS) is central to the progression of inflammatory bowel disease (IBD), which may be the potential therapeutic target. Prussian blue (PB) nanoparticles with good biosafety can act as an artificial nanozyme, effectively scavenging ROS. To date, PB-based nanomaterials have not been developed and utilized for treatment of IBD. In this study, poly(vinylpyrrolidone)-modified Prussian blue (PPB) nanoparticles are constructed with good physiological stability and biosafety by a simple and efficient method. The prepared PPBs with capabilities of scavenging ROS and inhibiting proinflammatory cytokine significantly reduce colitis in mice without distinct side effects via intravenous administration. This report provides a demonstration of the protective effect of PB-based nanomedicine against IBD in living animals, offering hope and a potential alternative treatment option for patients suffering from IBD.

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