TY - JOUR

T1 - A Synthetic Toolbox for the In Situ Formation of Functionalized Homo- and Heteropolysaccharide-Based Hydrogel Libraries

AU - Dibbert, Nick

AU - Krause, Andreas

AU - Rios-Camacho, Julio Cesar

AU - Gruh, Ina

AU - Kirschning, Andreas

AU - Dräger, Gerald

N1 - The work was funded by the Deutsche Forschungsgemeinschaft (Cluster of Excellence REBIRTH; “From Regenerative Biology to Reconstructive Therapy” EXC 62). Additionally, this work has been carried out as an integral part of the BIOFABRICATION FOR NIFE Initiative, which is financially supported by the ministry of Lower Saxony and the Volkswagen Stiftung (NIFE is the Lower Saxony Center for Biomedical Engineering, Implant Research and Development, a joint translational research center of the Hannover Medical School, the Leibniz Universität Hannover, the University of Veterinary Medicine Hannover and the Laser Center Hannover). J.-C.R.-C. was supported by The German Academic Exchange Service (Deutscher Akademischer Austauschdienst, DAAD).

PY - 2016/12/21

Y1 - 2016/12/21

N2 - A synthetic toolbox for the introduction of aldehydo and hydrazido groups into the polysaccharides hyaluronic acid, alginate, dextran, pullulan, glycogen, and carboxymethyl cellulose and their use for hydrogel formation is reported. Upon mixing differently functionalized polysaccharides derived from the same natural precursor, hydrazone cross-linking takes place, which results in formation of a hydrogel composed of one type of polysaccharide backbone. Likewise, hydrogels based on two different polysaccharide strands can be formed after mixing the corresponding aldehydo- and hydrazido-modified polysaccharides. A second line of these studies paves the way to introduce a biomedically relevant ligand, namely, the adhesion factor cyclic RGD pentapeptide, by using an orthogonal click reaction. This set of modified polysaccharides served to create a library of hydrogels that differ in the combination of polysaccharide strands and the degree of cross-linking. The different hydrogels were evaluated with respect to their rheological properties, their ability to absorb water, and their cytotoxicity towards human fibroblast cell cultures. None of the hydrogels studied were cytotoxic, and, hence, they are in principal biocompatible for applications in tissue engineering.

AB - A synthetic toolbox for the introduction of aldehydo and hydrazido groups into the polysaccharides hyaluronic acid, alginate, dextran, pullulan, glycogen, and carboxymethyl cellulose and their use for hydrogel formation is reported. Upon mixing differently functionalized polysaccharides derived from the same natural precursor, hydrazone cross-linking takes place, which results in formation of a hydrogel composed of one type of polysaccharide backbone. Likewise, hydrogels based on two different polysaccharide strands can be formed after mixing the corresponding aldehydo- and hydrazido-modified polysaccharides. A second line of these studies paves the way to introduce a biomedically relevant ligand, namely, the adhesion factor cyclic RGD pentapeptide, by using an orthogonal click reaction. This set of modified polysaccharides served to create a library of hydrogels that differ in the combination of polysaccharide strands and the degree of cross-linking. The different hydrogels were evaluated with respect to their rheological properties, their ability to absorb water, and their cytotoxicity towards human fibroblast cell cultures. None of the hydrogels studied were cytotoxic, and, hence, they are in principal biocompatible for applications in tissue engineering.

KW - aldehydes

KW - click chemistry

KW - gels

KW - hydrazones

KW - polysaccharides

UR - http://www.scopus.com/inward/record.url?scp=85002955809&partnerID=8YFLogxK

U2 - 10.1002/chem.201603748

DO - 10.1002/chem.201603748

M3 - Article

C2 - 27864999

AN - SCOPUS:85002955809

VL - 22

SP - 18777

EP - 18786

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

SN - 0947-6539

IS - 52

ER -