Abstract
Herein, we report the preparation and evaluation of a new composite consisting of gelatin matrix, oxidized carboxymethyl cellulose (OCMC), and hyperbranched polylysine (PL) components for full-thickness wound treatment. To enhance the antimicrobial activity of the gelatin matrix, OCMC/PL was successfully combined with this matrix via the Schiff base reaction. Moreover, allantoin (Alla) as a drug model was loaded by this composite and the optimal formulation for wound healing (PLOCG-Alla) was obtained. The structural properties, thermal stability, crystallinity and interactions between materials were investigated using SEM, TGA, XRD and FTIR techniques. Cytotoxicity and antibacterial capacity were evaluated by MTT assay and colony counting methods, respectively. The release behavior was investigated at two different pH values. Blood coagulation and wound healing potential were also evaluated in vivo. PLOCG-Alla exhibited high antibacterial capacity, pH-dependent release behavior, biocompatibility and high blood clotting ability. It also accelerated wound healing in vivo.
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