Wet-adhesive γ-PGA/ε-PLL hydrogel loaded with EGF for tracheal epithelial injury repair

An epidermal growth factor (EGF)-loaded gamma-polyglutamic acid (γ-PGA)/epsilon-poly- l -lysine (ε-PLL) hydrogel (PP), abbreviated as EGF@PP, promotes the repair of tracheal epithelial injury.