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Iron‐doped nanozymes with spontaneous peroxidase‐mimic activity as a promising antibacterial therapy for bacterial keratitis
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Iron‐doped nanozymes with spontaneous peroxidase‐mimic activity as a promising antibacterial therapy for bacterial keratitis
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Journal Article
Iron‐doped nanozymes with spontaneous peroxidase‐mimic activity as a promising antibacterial therapy for bacterial keratitis
2024
Overview
The development of non‐antibiotic pharmaceuticals with biocompatible and efficient antibacterial properties is of great significance for the treatment of bacterial keratitis. In this study, we have developed antibacterial iron‐doped nanozymes (Fe3+‐doped nanozymes, FNEs) with distinguished capacity to fight against bacterial infections. The iron‐doped nanozymes are composed of Fe3+ doped zeolitic imidazolate framework‐8 (Fe/ZIF‐8) and polyethylene imide (PEI), which were functionally coated on the surface of Fe/ZIF‐8 and imparted the FNEs with improved water dispersibility and biocompatibility. FNEs possess a significant spontaneous peroxidase‐mimic activity without the need for external stimulation, thus elevating cellular reactive oxygen species level by catalyzing local H2O2 at the infection site and resulting in bacteria damaged to death. FNEs eliminated 100% of Staphylococcus aureus within 6 h, and significantly relieved inflammation and bacterial infection levels in mice bacterial keratitis, exhibiting higher bioavailability and a superior therapeutic effect compared to conventional antibiotic eye drops. In addition, the FNEs would not generate drug resistance, suggesting that FNEs have great potential in overcoming infectious diseases caused by antimicrobial resistant bacteria. A functionalized antibacterial iron‐doped nanozyme with spontaneous peroxidase ‐mimic activity was fabricated to treat bacterial keratitis. The iron‐doped nanozymes could elevate cellular reactive oxygen species level and result in bacteria damaged to death, thus exhibiting an excellent therapeutic effect in bacterial keratitis.
