Food-Derived Tripeptide-Copper Self-Healing Hydrogel for Infected Wound Healing.
This study developed a composite hydrogel wound dressing (termed "GEK") by combining two food-derived biomaterials — oxidized konjac glucomannan (OKGM) from konjac and egg white (EW) proteins — cross-linked via Schiff base bonds to create a self-healing scaffold. The natural tripeptide-copper complex glycyl-l-histidyl-l-lysine-Cu (GHK-Cu) was incorporated into this hydrogel matrix. Researchers characterized the material's mechanical, self-repairing, and adhesive properties, then evaluated its biological performance in vitro and in vivo (likely using rodent infected wound models). The study reports that the GEK hydrogel demonstrated antibacterial and anti-inflammatory activity, promoted hemostasis through tissue adhesion, and supported neovascularization and skin regeneration. The all-natural composition was highlighted for its biocompatibility and biodegradability, with the authors proposing it as a cost-effective clinical strategy for infected wound management. Key limitations include that this is a preclinical materials science study with no human clinical data; evidence of efficacy is derived from laboratory and animal experiments. The translation of these findings to human wound care remains to be established through clinical trials.
Why this grade: The study combines in vitro characterization and animal wound-model experiments with no human subjects, placing it in the preclinical-mixed category despite its promising findings.
The field of infected wound management continues to face challenges, and traditional methods used to cope with wounds include debridement, gauze coverage, medication, and others. Currently, synthetic and natural biomaterials are readily available today, enabling the creation of new wound dressings that substantially enhance wound healing. Considerable attention is being paid to hydrogels based on natural materials, which have good biocompatibility and degradability properties, while exhibiting higher similarity to natural extracellular matrix as compared to synthetic materials. In this study, we extracted the active ingredients of oxidized konjac glucomannan (OKGM) and fresh egg white (EW) from 2 foods, konjac, and egg, respectively, and formed a self-repairing hydrogel based on the cross-linking of a Schiff base. Subsequently, a natural active peptide, glycyl-l-histidyl-l-lysine-Cu (GHK-Cu), was loaded, and an all-natural composite hydrogel dressing, EW/OKGM@GHK-Cu (GEK), was developed. The GEK hydrogel, exhibiting both antibacterial and anti-inflammatory properties, plays a hemostatic role by adhering to tissues and promoting neovascularization and serves as an optimal dressing for skin regeneration. Taken together, GEK hydrogel dressings derived from natural food sources therefore constitute an efficient and cost-effective strategy for managing infected wound healing and have significant potential for clinical application and transformation.
Educational summary of published research — not medical advice. License: cc by. Full text is shown only where licensing permits.