Biodegradable copper vanadate-based hydrogel with photocatalytic/photothermal therapy for infected diabetic wound healing

[Display omitted] •Cu2V2O7-based hydrogel effectively kills bacteria via the visible-light-induced photocatalytic effect.•Cu2V2O7-based hydrogel repairs high glucose-impaired angiogenesis via sustained copper/vanadium ions.•The near-infrared light-induced mild photothermal effect enhances both the antibacterial and tissue regeneration ability. In light of the clinical challenges posed by bacterial infection and vascular damage in chronic diabetic wounds, this study presents a novel bioactive copper vanadate-based hydrogel (CVH) with multiple functions including the sustained release of copper and vanadium ions, photocatalytic activity under visible (VIS) light, and photothermal ability under near-infrared (NIR) light. In vitro experiments demonstrated that CVH effectively repairs high glucose-impaired human umbilical vein endothelial cells (HUVECs) and exhibits potent antibacterial activity against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). Furthermore, the dual biological functions are augmented by the NIR-light-induced mild photothermal effect, demonstrating a synergistic effect. The infected diabetic wound model further substantiates the therapeutic efficacy of the CVH dressing in eliminating bacteria and promoting angiogenesis under VIS/NIR light irradiation. Collectively, the CVH dressing demonstrates significant potential as a therapeutic intervention for managing chronic diabetic wounds.