In situ generating CO gas for destroying bacterial biofilms

: Zhuang, Pengzhen; Yang, Wu; Zhang, Yu; Chen, Yu; Ding, Tao; Chen, Yanyang; Wang, Fei; Rosenholm, Jessica; Li, Yingchuan; Zhang, Hongbo; Cui, Wenguo;

Publisher: Elsevier B.V.

: 2024

: Nano Today

: 102296

: 56

: 1748-0132

: 1878-044X

DOI: https://doi.org/10.1016/j.nantod.2024.102296

: https://doi.org/10.1016/j.nantod.2024.102296

: https://research.utu.fi/converis/portal/detail/Publication/457236964

The resistance and impermeability of bacterial biofilms lead to incurable infections. Interference with bacterial respiration is the key to the eradication of bacterial biofilm, but breaking the deep-tissue biofilm barrier to disrupt bacterial respiration still lacks effective means. Here, we report a hydrogel microsphere that disrupts bacterial respiration, supports in situ production of carbon monoxide gas (CO) to enhance the oxygen-depleted environment of biofilms and disrupts the bacterial respiratory chain, eliminating the bacterial biofilm ecotone (BRDMs). Under the specific interaction of α-helical structure and bacterial biofilm, BRDMs rapidly anchored and accumulated on the surface of bacterial biofilm within 8 h. Meanwhile, 8.64 μM CO gas was released in situ under an oxidative stress environment to deeply penetrate the biofilm and continuously destroy bacterial terminal oxidase, block bacterial respiration and finally disintegrate the biofilm. In a model of osteomyelitis, BRDMs disrupt the ecotopic colonization of MRSA biofilms in deep tissues, reduce inflammation, restore internal environmental homeostasis and accelerate tissue regeneration. BRDMs could be designed to remove drug-resistant biofilms from a wide range of deep tissues.

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This work was supported by the National Key Research and Development Program of China ( 2020YFA0908200 ), National Natural Science Foundation of China ( 81930051 ), National Natural Science Foundation of China (grant No. 82272245 ), Shanghai Municipal Health and Family Planning Commission ( 2022XD055 ), Research Fellow (Grant No. 353146 ), Project ( 347897 ), Solution for Health Profile ( 336355 ), and InFLAMES Flagship ( 337531 ) grants from Academy of Finland, Finland China Food and Health International Pilot Project funded by the Finnish Ministry of Education and Culture, and Guangci Professorship Program of Ruijin Hospital Shanghai Jiao Tong University School of Medicine. This study is part of the activities of the Åbo Akademi University Foundation (SÅA) funded Center of Excellence in Research "Materials-driven solutions for combating antimicrobial resistance (MADNESS).