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于歡工作發表在Advanced Healthcare Materials-2
來源:石恒沖研究員個人網站 發布日期:2023-06-09

Abstract:

Bacterial infections and multiple encrustations are life-threatening complications in patients implanted with urological devices. Limited by time-consuming procedures and substrate dependence, it is difficult to simultaneously prevent the aforementioned complications. Herein, is reported the design of a salt-triggered chondroitin sulfate complex (CS/Si-N+) coating with adaptive dissociation, which realizes the dual functions of antibacterial and anti-multiple encrustations in urological devices with arbitrary shapes. The existence of covalent interactions between the complex and the interface ensures the formation of a robust coating, especially in harsh environments. Benefiting from the adaptive dissociation of the ion pairs in the CS/Si-N+ coating in urine electrolytes, the exposed ion groups and enhanced hydrophilicity are more conducive to the inhibition of bacterial infection and multiple encrustations simultaneously. The coating exhibits broad-spectrum bactericidal effects. As a proof of concept, in a simulated metabolic encrustation model, the coating exhibits significant advantages in resisting calcium oxalate encrustation, with a reduction in the calcium content by over 90%. In addition, this non-leachable all-in-one coating shows good biocompatibility in a pig in vivo model. Such a coating strategy is expected to be a practical approach for preventing urological medical device-related complications.

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