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BACKGROUND Lysozymes and antibacterial peptides have been confirmed to protect humans against viral and bacterial infection, and accelerate wound healing. The study aimed to evaluate the effect of lysozyme-antimicrobial peptide fusion protein on the diabetic wound size reduction in streptozotocin (STZ)-induced diabetic rats. MATERIAL AND METHODS Diabetic rats were prepared via intraperitoneal injection of STZ, 70 mg/kg. A 2-cm circular incision with full thickness was made on the dorsum skin of the rats for preparation of diabetic wound model. The wounds were treated with the fusion protein or phosphate buffer saline. RESULTS The fusion protein markedly accelerated wound healing, decreased levels of proinflammatory cytokines such as interleukin (IL)-6 and tumor necrosis factor (TNF)-α, lipid peroxide (LPO) content, and expression of cyclooxygenase-2 (COX-2), and increased activities of antioxidant enzyme including superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) in serum, levels of pro-angiogenic cytokines such as vascular endothelial growth factor (VEGF) and intercellular adhesion molecule (ICAM-1), and expression of VEGF, FGF-2, p-ERK, and p-Akt protein in granulation. CONCLUSIONS The results of the present study suggested that the fusion protein accelerated wound healing by improving anti-inflammation and antioxidant, and increasing angiogenesis in granulation tissues of diabetic rats.

Lysozyme-Antimicrobial Peptide Fusion Protein Promotes the Diabetic Wound Size Reduction in Streptozotocin (STZ)-Induced Diabetic Rats