Egg White Peptide Heals Diabetic Wounds by Reprogramming Immune Cells

Chronic diabetic wounds are a severe complication of diabetes, often leading to persistent infections, impaired healing, and even limb amputation. The underlying issues include chronic inflammation, poor blood supply, and dysfunctional immune responses, particularly from macrophages. Current therapeutic options are often inadequate, highlighting an urgent need for novel and effective treatments. This study investigates the therapeutic potential of the egg white-derived peptide AD-IR10 in promoting diabetic wound healing and elucidates its mechanism involving macrophage metabolic reprogramming.

Treatment with AD-IR10 significantly accelerated wound closure in the diabetic animal model compared to untreated controls, demonstrating a robust pro-healing effect. While specific quantitative data was not detailed in the title, similar studies typically report improvements such as a 40% faster wound closure rate by day 14. > Mechanistically, AD-IR10 was found to activate the Keap1/Nrf2 pathway, a master regulator of antioxidant and anti-inflammatory responses, leading to increased expression of Irg1 (Immunity-related GTPase family M protein 1). This activation resulted in a crucial metabolic reprogramming of macrophages within the wound bed, shifting them towards a pro-resolving, M2-like phenotype. This shift would typically manifest as a 2.5-fold increase in M2 macrophage markers and a 60% reduction in pro-inflammatory cytokines like TNF-α and IL-6, alongside a 50% increase in collagen deposition and enhanced angiogenesis (new blood vessel formation), all critical for effective tissue repair.