Nano-Micro Letters ›› 2024, Vol. 16 ›› Issue (1): 156-. doi: 10.1007/s40820-024-01353-0

• ARTICLE • Previous Articles     Next Articles

ROS Balance Autoregulating Core-Shell CeO2@ZIF-8/Au Nanoplatform for Wound Repair

Xi Zhou1, Quan Zhou1, Zhaozhi He1, Yi Xiao3, Yan Liu3, Zhuohang Huang1, Yaoji Sun2, Jiawei Wang2, Zhengdong Zhao4, Xiaozhou Liu4, Bin Zhou5, Lei Ren1, Yu Sun4,*(), Zhiwei Chen2,*(), Xingcai Zhang3,*()   

  1. 1 The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province, Research Center of Biomedical Engineering of Xiamen, Department of Biomaterials, College of Materials, Xiamen University, Xiamen, 361005, People’s Republic of China
    2 Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance Research, School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005, People’s Republic of China
    3 John A Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
    4 Department of Otorhinolaryngology, Union Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, People’s Republic of China
    5 NO.1 Middle School Affiliated to Central China Normal University, Wuhan, 430223, People’s Republic of China
  • Received:2023-10-23 Accepted:2024-01-08 Online:2024-01-01 Published:2024-03-21
  • Contact: Yu Sun, Zhiwei Chen, Xingcai Zhang

Abstract:

Reactive oxygen species (ROS) plays important roles in living organisms. While ROS is a double-edged sword, which can eliminate drug-resistant bacteria, but excessive levels can cause oxidative damage to cells. A core-shell nanozyme, CeO2@ZIF-8/Au, has been crafted, spontaneously activating both ROS generating and scavenging functions, achieving the multi-faceted functions of eliminating bacteria, reducing inflammation, and promoting wound healing. The Au Nanoparticles (NPs) on the shell exhibit high-efficiency peroxidase-like activity, producing ROS to kill bacteria. Meanwhile, the encapsulation of CeO2 core within ZIF-8 provides a seal for temporarily limiting the superoxide dismutase and catalase-like activities of CeO2 nanoparticles. Subsequently, as the ZIF-8 structure decomposes in the acidic microenvironment, the CeO2 core is gradually released, exerting its ROS scavenging activity to eliminate excess ROS produced by the Au NPs. These two functions automatically and continuously regulate the balance of ROS levels, ultimately achieving the function of killing bacteria, reducing inflammation, and promoting wound healing. Such innovative ROS spontaneous regulators hold immense potential for revolutionizing the field of antibacterial agents and therapies.

Key words: Metal-organic framework (MOF), Reactive oxygen species (ROS), Cerium dioxide, Au nanoparticles, Wound healing