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CuCo2O4 Nanoflowers with Multiple Enzyme Activities for Treating Bacterium-Infected Wounds via Cuproptosis-like Death
Abstract
Nanozyme-driven catalytic therapy provides a promising treatment strategy for bacterial biofilm-infected wounds. However, the single functionality and limited catalytic efficiency of nanozyme-based materials often restrict the effectiveness of wound infection treatment. In this study, CuCo 2 O 4 nanoflowers with multiple enzymatic activities were prepared for antibacterial/antibiofilm treatment by cuproptosis-like death. CuCo 2 O 4 exhibited peroxidase-like (POD-like) and oxidase-like (OXD-like) dual enzyme activities that generated large amounts of •OH and O 2 •– . Moreover, the glutathione peroxidase-like (GSH-Px-like) activity of CuCo 2 O 4 was able to reduce the overexpression of GSH in the wound microenvironment, enhancing the therapeutic effects of reactive oxygen species (ROS). The morphology of CuCo 2 O 4 was modified using a hydrothermal method with PEG4000 as the solvent, resulting in the exposure of more active center sites and a significant improvement in enzyme catalytic activity. The in vitro results demonstrated the pronounced disruption effect of CuCo 2 O 4 on biofilms formed by bacteria. In vivo, CuCo 2 O 4 significantly promoted angiogenesis, collagen deposition, and cell proliferation. Transcriptome sequencing revealed that elevated ROS levels in bacteria led to cell membrane damage and metabolic disruption. In addition, Cu 2+ overload in bacteria induces lipid peroxidation accumulation and disrupts the respiratory chain and tricarboxylic acid (TCA) cycle, ultimately leading to bacterial cuproptosis-like death. This therapeutic strategy, which combines the synergistic effects of multiple enzyme-like activities with cuproptosis-like death, provides an approach for treating biofilm infections.
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Metadata
- Authors
- Wang, W., Cui, Y., Wei, X., Zang, Y., Chen, X., Cheng, L., & Wang, X.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2024-06-04
- Volume
- 18
- Issue
- 24
- Pages
- 15845-15863
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W4399324438
- Cited by
- 303
- References
- 36
- FWCI
- 28.76
- Type
- journal article
- Language
- en
- Open access
- closed
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