Authors Zieris, A. ; Dockhorn, R. ; Röhrich, A. ; Zimmermann, R. ; Müller, M. ; Welzel, P. ; Tsurkan, M. ; Sommer, J.-U. ; Freudenberg, U. ; Werner, C.
Title Biohybrid networks of selectively desulfated glycosaminoglycans for tunable growth factor delivery
Date 03.11.2014
Number 44584
Abstract Sulfation patterns of glycosaminoglycans (GAG) govern the electrostatic complexation of biomolecules and thus allow for modulating the release profiles of growth factors from GAG-based hydrogels. To explore the related options, selectively desulfated heparin derivatives were prepared, thoroughly characterized and covalently converted with star-shaped poly(ethylene glycol) into binary polymer networks. The impact of the GAG sulfation pattern on network characteristics of the obtained hydrogels was theoretically evaluated by mean field methods and experimentally analyzed by rheometry and swelling measurements. Sulfation-dependent differences of reactivity and miscibility of the heparin derivatives were shown to determine network formation. A theory-based design concept for customizing growth factor affinity and physical characteristics was introduced and validated by quantifying the release of fibroblast growth factor 2 from a set of biohybrid gels. The resulting new class of cell-instructive polymer matrices with tunable GAG sulfation will be instrumental for multiple applications in biotechnology and medicine.
Publisher Biomacromolecules
Citation Biomacromolecules 15 (2014) 4439-446

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