Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 507133
Title Nanofibrillar hydrogel scaffolds from recombinant protein-based polymers with integrin- and proteoglycan-binding domains
Author(s) Wlodarczyk-Biegun, Gosia; Werten, Marc W.T.; Posadowska, Urszula; Storm, Ingeborg M.; Wolf, Frits A. de; Beucken, Jeroen J.J.P. van den; Leeuwenburgh, Sander C.G.; Cohen Stuart, Martien; Kamperman, Marleen
Source Journal of Biomedical Materials Research Part A 104 (2016)12. - ISSN 1549-3296 - p. 3082 - 3092.
Department(s) FBR Bioconversion
Physical Chemistry and Soft Matter
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) KRSR cell-adhesive domain - Pichia pastoris - Protein-based polymers - Self-assembled hydrogel - Tissue engineering

This study describes the design, production, and testing of functionalized variants of a recombinant protein-based polymer that forms nanofibrillar hydrogels with self-healing properties. With a view to bone tissue engineering applications, we equipped these variants with N-terminal extensions containing either (1) integrin-binding (RGD) or (2) less commonly studied proteoglycan-binding (KRSR) cell-adhesive motifs. The polymers were efficiently produced as secreted proteins using the yeast Pichia pastoris and were essentially monodisperse. The pH-responsive protein-based polymers are soluble at low pH and self-assemble into supramolecular fibrils and hydrogels at physiological pH. By mixing functionalized and nonfunctionalized proteins in different ratios, and adjusting pH, hydrogel scaffolds with the same protein concentration but varying content of the two types of cell-adhesive motifs were readily obtained. The scaffolds were used for the two-dimensional culture of MG-63 osteoblastic cells. RGD domains had a slightly stronger effect than KRSR domains on adhesion, activity, and spreading. However, scaffolds featuring both functional domains revealed a clear synergistic effect on cell metabolic activity and spreading, and provided the highest final degree of cell confluency. The mixed functionalized hydrogels presented here thus allowed to tailor the osteoblastic cell response, offering prospects for their further development as scaffolds for bone regeneration.

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