Near-infrared Light-accelerated Glucose Oxidase-MoS2 Cascade Catalytic Chemodynamic Therapy in Synergistic Cationic Polymer Hydrogels to Combate Multibacterial Infection

Given the poor antibacterial activity of hydrogels, a multimodal synergistic antibacterial hydrogel based on dopamine-modified oxidized hyaluronic acid was developed, and its antibacterial activity and biocompatibility were demonstrated. First, dopamine-modified oxidized hyaluronic acid (OHA-DA) was used as the hydrogel backbone. A dual-dynamically cross-linked injectable hydrogel was constructed by mixing OHA-DA, Fe3+ with cationic antimicrobial peptide polylysine (EPL) via Schiff base and coordination complexation. Next, glucose oxidase-loaded MoS2 nanosheets were synthesized through electrostatic interaction and loaded into the hydrogel through physical mixing. Finally, a multimodal synergistic antibacterial hydrogel OD/EPL/GM was obtained. Antibacterial experiments show that the hydrogel has good antibacterial activity against E. coli and S. aureus, and the antibacterial rate can reach 99.99%.

Automated summary

A multimodal synergistic antibacterial hydrogel based on dopamine-modified oxidized hyaluronic acid was developed, showing good antibacterial activity against E. coli and S. aureus with an antibacterial rate of 99.99%. The hydrogel was constructed by mixing dopamine-modified oxidized hyaluronic acid with cationic antimicrobial peptide polylysine via Schiff base and coordination complexation, and loading glucose oxidase-loaded MoS2 nanosheets into the hydrogel. This research demonstrates the potential of the developed hydrogel in antibacterial applications.