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| 1 | Biomimetic copper single-atom nanozyme system for self-enhanced nanocatalytic tumor therapy显示文摘Single-atom nanozymes(SAZs)with peroxidase(POD)-like activity have good nanocatalytic tumor therapy(NCT)capabilities.However,insufficient hydrogen peroxide(H2O2)and hydrogen ions in the cells limit their therapeutic effects.Herein,to overcome these limitations,a biomimetic single-atom nanozyme system was developed for self-enhanced NCT.We used a previously described approach to produce platelet membrane vesicles.Using a high-temperature carbonization approach,copper SAZs with excellent POD-like activity were successfully synthesized.Finally,through physical extrusion,a proton pump inhibitor(PPI;pantoprazole sodium)and the SAZs were combined with platelet membrane vesicles to create PPS.Both in vivo and in vitro,PPS displayed good tumor-targeting and accumulation abilities.PPIs were able to simultaneously regulate the hydrogen ion,glutathione(GSH),and H2O2 content in tumor cells,significantly improve the catalytic ability of SAZs,and achieve self-enhanced NCT.Our in vivo studies showed that PPS had a tumor suppression rate of>90%.PPS also limited the synthesis of GSH in cells at the source;thus,glutamine metabolism therapy and NCT were integrated into an innovative method,which provides a novel strategy for multimodal tumor therapy. | Daoming Zhu Ruoyu Ling Hao Chen Meng Lyu Haisheng Qian Konglin Wu Guoxin Li Xianwen Wang | 2022 | Nano Research2022，15，8： | 0 |
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