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Huber D, Tegl G, Mensah A, Beer B, Baumann M, Borth N, Sygmund C, Ludwig R, Guebitz GM. A Dual-Enzyme Hydrogen Peroxide Generation Machinery in Hydrogels Supports Antimicrobial Wound Treatment. ACS APPLIED MATERIALS & INTERFACES 2017; 9:15307-15316. [PMID: 28429928 DOI: 10.1021/acsami.7b03296] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The aging population and accompanying diseases like diabetes resulted in an increased occurrence of chronic wounds. Topical wound treatment with antimicrobial agents to inhibit bacterial invasion and promote wound healing is often associated with difficulties. Here, we investigated the potential of succinyl chitosan (SC)-carboxymethyl cellulose (CMC) hydrogels which constantly release clinically relevant levels of hydrogen peroxide (H2O2). CMC hydrogel matrix was in situ converted by limited hydrolysis by a cellulase into substrates accepted by cellobiose dehydrogenase (CDH) for continuous production of H2O2 (30 μM over 24 h). This dual-enzyme catalyzed in situ H2O2 generation system proved its antimicrobial activity in a zone of inhibition (ZOI) assay best simulating the application as wound dressing and was found to be biocompatible toward mouse fibroblasts (95% viability). The hydrogels were thoroughly characterized regarding their rheological properties indicating fast gel formation (<3 min) and moderate cross-linking (1.5% strain, G' = 10 Pa). Cooling (fridge conditions) was found to be the simple on/off switch of the enzymatic machinery which is of great importance regarding storage and applicability of the bioactive hydrogel. This robust and bioactive antimicrobial hydrogel system overcomes dosing issues of common topical wound treatments and constitutes a promising wound healing approach for the future.
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Affiliation(s)
- Daniela Huber
- Institute of Environmental Biotechnology, BOKU-University of Natural Resources and Life Sciences , Konrad Lorenz Straße 20, 3430 Tulln an der Donau, Austria
| | - Gregor Tegl
- Institute of Environmental Biotechnology, BOKU-University of Natural Resources and Life Sciences , Konrad Lorenz Straße 20, 3430 Tulln an der Donau, Austria
| | - Anna Mensah
- Institute of Environmental Biotechnology, BOKU-University of Natural Resources and Life Sciences , Konrad Lorenz Straße 20, 3430 Tulln an der Donau, Austria
| | - Bianca Beer
- Institute of Environmental Biotechnology, BOKU-University of Natural Resources and Life Sciences , Konrad Lorenz Straße 20, 3430 Tulln an der Donau, Austria
| | - Martina Baumann
- ACIB-Austrian Centre of Industrial Biotechnology , Konrad Lorenz Straße 20, 3430 Tulln, Austria
| | - Nicole Borth
- ACIB-Austrian Centre of Industrial Biotechnology , Konrad Lorenz Straße 20, 3430 Tulln, Austria
- Department of Biotechnology, University of Natural Resources and Life Sciences (BOKU) , Muthgasse 18, 1190 Vienna, Austria
| | - Christoph Sygmund
- Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences , Muthgasse 18, 1190 Vienna, Austria
| | - Roland Ludwig
- Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences , Muthgasse 18, 1190 Vienna, Austria
| | - Georg M Guebitz
- Institute of Environmental Biotechnology, BOKU-University of Natural Resources and Life Sciences , Konrad Lorenz Straße 20, 3430 Tulln an der Donau, Austria
- ACIB-Austrian Centre of Industrial Biotechnology , Konrad Lorenz Straße 20, 3430 Tulln, Austria
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Bratek-Skicki A, Żeliszewska P, Ruso JM. Fibrinogen: a journey into biotechnology. SOFT MATTER 2016; 12:8639-8653. [PMID: 27722513 DOI: 10.1039/c6sm01895e] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Fibrinogen has been known since the mid-nineteenth century. Although initially its interest had been within the field of physiology over time its study has spread to new disciplines such as biochemistry, colloids and interfaces or biotechnology. First, we will describe the bulk properties of the molecule as well as its supramolecular assembly with different ligands by using different techniques and theoretical models. In the next step we will analyze the interfacial properties, an important topic because fibrinogen is considered to be a major inhibitor of lung surfactants' function at the lining layer of alveoli. The final step will be devoted to its main application in biotechnology. Thus, the adsorption of fibrinogen at solid/electrolyte interfaces and at carrier particles will be discussed. The reversibility of adsorption, fibrinogen molecule orientation, and maximum coverage will be thoroughly discussed. The stability of fibrinogen monolayers formed at these surfaces with respect to pH and ionic strength cyclic changes will also be presented. Based on the physicochemical data, adsorption kinetics and colloid particle deposition measurements, probable adsorption mechanisms of fibrinogen on solid/electrolyte interfaces will be defined.
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Affiliation(s)
- Anna Bratek-Skicki
- J. Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland
| | - Paulina Żeliszewska
- J. Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland
| | - Juan M Ruso
- Soft Matter and Molecular Biophysics Group, Department of Applied Physics, University of Santiago de Compostela, Spain.
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