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  • Title: In situ forming and rutin-releasing chitosan hydrogels as injectable dressings for dermal wound healing.
    Author: Tran NQ, Joung YK, Lih E, Park KD.
    Journal: Biomacromolecules; 2011 Aug 08; 12(8):2872-80. PubMed ID: 21591793.
    Abstract:
    An in situ gel-forming system composed of rutin- and tyramine-conjugated chitosan derivatives, horseradish peroxidase (HRP), and hydrogen peroxide (H(2)O(2)) was prepared and applied to dermal wound repair. Rutin was employed to enhance production and accumulation of extracellular matrix in the healing process. In vitro study demonstrates that released rutin significantly enhanced cell proliferation as compared with media without rutin. In vivo wound healing study was performed by injecting hydrogels on rat dorsal wounds with a diameter of 8 mm for 14 days. Histological results demonstrated that rutin-conjugated hydrogel exhibited enhancement of wound healing as compared with treatments with PBS, hydrogel without rutin, and a commercialized wound dressing (Duoderm). More specifically, rutin-conjugated hydrogels induced better defined formation of neo-epithelium and thicker granulation, which is closer to the original epithelial tissue. As a result, this study suggests that the in situ gel-forming system can be a promising injectable gel-type wound dressing.
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