Controlled Release of the α-Tocopherol-Derived Metabolite α-13′-Carboxychromanol from Bacterial Nanocellulose Wound Cover Improves Wound Healing / Jessica Hoff, Berit Karl, Jana Gerstmeier, Uwe Beekmann, Lisa Schmölz, Friedemann Börner, Dana Kralisch, Michael Bauer, Oliver Werz, Dagmar Fischer, Stefan Lorkowski and Adrian T. Press

Abstract: Inflammation is a hallmark of tissue remodeling during wound healing. The inflammatory response to wounds is tightly controlled and well-coordinated; dysregulation compromises wound healing and causes persistent inflammation. Topical application of natural anti-inflammatory products may improve wound healing, in particular under chronic pathological conditions. The long-chain metabolites of vitamin E (LCM) are bioactive molecules that mediate cellular effects via oxidative stress signaling as well as anti-inflammatory pathways. However, the effect of LCM on wound healing has not been investigated. We administered the α-tocopherol-derived LCMs α-13′-hydroxychromanol (α-13′-OH) and α-13′-carboxychromanol (α-13′-COOH) as well as the natural product garcinoic acid, a δ-tocotrienol derivative, in different pharmaceutical formulations directly to wounds using a splinted wound mouse model to investigate their effects on the wounds’ proinflammatory microenvironment and wound healing. Garcinoic acid and, in particular, α-13′-COOH accelerated wound healing and quality of the newly formed tissue. We next loaded bacterial nanocellulose (BNC), a valuable nanomaterial used as a wound dressing with high potential for drug delivery, with α-13′-COOH. The controlled release of α-13′-COOH using BNC promoted wound healing and wound closure, mainly when a diabetic condition was induced before the injury. This study highlights the potential of α-13′-COOH combined with BNC as a potential active wound dressing for the advanced therapy of skin injuries. Keywords: biocompatible nanocellulose; wound healing; drug delivery; controlled release; inflammation; tocopherols; natural products

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Persons: Hoff, Jessica [Author]; Karl, Berit [Author]; Gerstmeier, Jana Karin [Author]; Beekmann, Uwe Sven [Author]; Schmölz, Lisa [Author]; Börner, Friedemann [Author]; Kralisch, Dana [Author]; Bauer, Michael [Author]; Werz, Oliver [Author]; Fischer, Dagmar [Author]; Lorkowski, Stefan [Author]; Press, Adrian Tibor [Author]
Format: eArticle
Publication:28 July 2021
Part of:Nanomaterials 11(2021,8) Artikel-Nummer 1939, 16 Seiten