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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received July 8, 2020
Accepted September 1, 2020
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Tyrosinase-mediated rapid and permanent chitosan/gelatin and chitosan/gelatin/nanohydroxyapatite hydrogel

Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Korea 1Department of Biotechnology and Bioinformatics, Korea University, Sejong 30019, Korea
biochoi@cnu.ac.kr
Korean Journal of Chemical Engineering, January 2021, 38(1), 98-103(6), 10.1007/s11814-020-0672-5
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Abstract

Chitosan/gelatin and chitosan/gelatin/nanohydroxyapatite hydrogels were rapidly and stably prepared without any crosslinking materials by using an engineered tyrosinase (mTyr-CNK) with high catalytic activity for tyrosine/ DOPA-tethered polymeric biomaterials throughout a broad pH range. A dual-barrel syringe with one part containing chitosan/mTyr-CNK solution and the other containing gelatin solution with/without nanohydroxyapatite was successfully used to form homogeneous hydrogels at room temperature followed by 37 °C to simulate an in situ injection approach. The obtained hydrogels exhibited an average pore size greater than 150 μm and high swelling ratios with similar mechanical properties to other chemically crosslinked chitosan/gelatin hydrogels. The in vitro degradation properties and cellular viability suggested that the hydrogels could be used as biodegradable and biocompatible scaffolds for biomedical applications, such as space filling biomaterials and delivery vehicles for bioactive molecules and cells. These results demonstrated that mTyr-CNK-mediated hydrogels have remarkable promise as an injectable scaffold biomaterial.

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