High-entropy alloy Janus artificial enzymes for pH-gated sequential redox therapy of drug-resistant bacterial infection.

ABSTRACT: Drug-resistant bacterial infections in chronic wounds remain a critical challenge, particularly under persistent inflammation. Here, we report the de novo design of high-entropy alloy (HEA, PtFeCuCoNi)-based Janus artificial enzymes with pH-gated redox biocatalysis for sequential antibacterial and repair functions. The multi-metal synergy stabilizes the d-band center, allowing acidic oxidase/peroxidase-like activity and neutral antioxidase-like activity. In infection, the enzymes generate bactericidal reactive oxygen species (ROS) to eliminate methicillin-resistant Staphylococcus aureus (MRSA) and biofilms at ultralow concentrations (8 μg/mL). During healing, they scavenge ROS, alleviate oxidative injury and support cellular proliferation. In MRSA-infected wounds, this dual-action system c

SUBMITTER: Han C 

PROVIDER: S-EPMC12868632 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature