Bioactive multi-engineered hydrogel offers simultaneous promise against antibiotic resistance and wound damage

Wound healing is a complex process involved in repairing tissue damage and preventing infection. However, there is a lack of appropriate treatment solutions that can simultaneously promote tissue repair and protect againstbacteria, especially antibiotic-resistant bacteria. In this study, we have developed an injectable hydrogel encapsulating acidic fibroblast growth factor (aFGF) and bacteriophage, termed as ABgel, for combating antibiotic-resistant bacteria and enhancing wound regeneration. ABgel is composed of oxidized sodium alginate (OSA), gelatin and hyaluronic acid (HA), and can rapidly form hydrogel with an elastic modulus of 13 kPa, which mimics the skin tissues. In addition, ABgel can effectively load and stabilize bacteriophage and aFGF, allowing for preventing bacterial infections and improving regeneration of damaged dermal tissues. In vitro studies demonstrate that ABgel exhibits enormous antibacterial activity against antibiotic-resistant E. coli and enhanced angiogenetic activity. Importantly, ABgel can promote skin regeneration and prevent bacterial infections in mice, thereby promoting wound healing process. Therefore, ABgel represents a decent bioactive engineered hydrogel dressing with a broad application potential.