The in vitro characterization of a gelatin scaffold,prepared by cryogelation and assessed in vivo as a dermal replacement in wound repair |
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| Affiliation: | 1. Biomaterials and Medical Devices Research Group, School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton BN2 4GJ, UK;2. Pharmidex Pharmaceutical Services Ltd., London W1S 1YH, UK;3. StratiCELL SA/NV, Crealys Science Park, B-5032 Isnes, Belgium;4. Nazarbayev University, School of Engineering, Astana 010000, Kazakhstan;1. Department of Biotechnology, Lund University, Lund, Sweden;2. Indienz AB, Annebergs Gård PL 5520, Se-26873 Billeberga, Sweden;1. Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, People’s Republic of China;2. Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, People’s Republic of China;3. Department of Chemistry, Jinan University, Guangzhou 510632, People’s Republic of China;4. Department of Biomedical Engineering, Jinan University, Guangzhou 510632, People’s Republic of China;1. Department of Bioengineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA 16802, USA;2. Department of Bioengineering, The University of Texas at Arlington, Arlington, TX 76019, USA |
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| Abstract: | A sheet gelatin scaffold with attached silicone pseudoepidermal layer for wound repair purposes was produced by a cryogelation technique. The resulting scaffold possessed an interconnected macroporous structure with a pore size distribution of 131 ± 17 μm at one surface decreasing to 30 ± 8 μm at the attached silicone surface. The dynamic storage modulus (G′) and mechanical stability were comparable to the clinical gold standard dermal regeneration template, Integra®. The scaffolds were seeded in vitro with human primary dermal fibroblasts. The gelatin based material was not only non-cytotoxic, but over a 28 day culture period also demonstrated advantages in cell migration, proliferation and distribution within the matrix when compared with Integra®. When seeded with human keratinocytes, the neoepidermal layer that formed over the cryogel scaffold appeared to be more advanced and mature when compared with that formed over Integra®. The in vivo application of the gelatin scaffold in a porcine wound healing model showed that the material supports wound healing by allowing host cellular infiltration, biointegration and remodelling. The results of our in vitro and in vivo studies suggest that the gelatin based scaffold produced by a cryogelation technique is a promising material for dermal substitution, wound healing and other potential biomedical applications. |
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| Keywords: | Cryogel Macroporous scaffold Wound healing Dermal skin substitute Pig model |
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