Injectable hyaluronic acid-dextran hydrogels and effects of implantation in ferret vocal fold

Authors

  • Ying Luo,

    Corresponding author
    1. Department of Biomedical Engineering, College of Engineering, Peking University, 60 Yan-Nan Yuan, Haidian District, Beijing, China 100871
    • Department of Biomedical Engineering, College of Engineering, Peking University, 60 Yan-Nan Yuan, Haidian District, Beijing, China 100871
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  • James B. Kobler,

    1. Department of Surgery, Harvard Medical School and the Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, Boston, Massachusetts 02114
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  • James T. Heaton,

    1. Department of Surgery, Harvard Medical School and the Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, Boston, Massachusetts 02114
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  • Xinqiao Jia,

    1. Department of Material Science and Engineering, University of Delaware, Newark, Delaware 19716
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  • Steven M. Zeitels,

    1. Department of Surgery, Harvard Medical School and the Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, Boston, Massachusetts 02114
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  • Robert Langer

    1. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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  • The work presented in this manuscript was conducted at the Massachusetts Institute of Technology, Cambridge of Massachusetts

Abstract

Injectable hydrogels may potentially be used for augmentation/regeneration of the lamina propria of vocal fold tissue. In this study, hyaluronic acid (HA) and dextran were chemically modified and subsequently crosslinked via formation of hydrazone bonds in phosphate buffer. Swelling ratios, degradation, and compressive moduli of the resulting hydrogels were investigated. It was found that the properties of HA-dextran hydrogels were variable and the trend of variation could be correlated with the hydrogel composition. The biocompatibility of three injectable HA-dextran hydrogels with different crosslinking density was assessed in the vocal fold region using a ferret model. It was found that HA-dextran hydrogels implanted for three weeks stimulated mild foreign-body reactions. Distinct tissue-material interactions were also observed for hydrogels made from different formulations: the hydrogel with the lowest crosslinking density was completely degraded in vivo; while material residues were visible for other types of hydrogel injections, with or without cell penetration into the implantation depending on the hydrogel composition. The in vivo results suggest that the HA-dextran hydrogel matrices can be further developed for applications of vocal fold tissue restoration. © 2010 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2010

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