Cell adhesion and proliferation on RGD-modified recombinant spider silk proteins

Titelangaben

Wohlrab, Stefanie ; Müller-Herrmann, Susanne ; Schmidt, Andreas ; Neubauer, Stefanie ; Kessler, Horst ; Leal-Egaña, Aldo ; Scheibel, Thomas:
Cell adhesion and proliferation on RGD-modified recombinant spider silk proteins.
In: Biomaterials. Bd. 33 (2012) Heft 28 . - S. 6550-6559.
ISSN 0142-9612
DOI: https://doi.org/10.1016/j.biomaterials.2012.05.069

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Abstract

Due to the biocompatibility and biodegradability as well as the mechanical properties of the fibers, spider silk has become an attractive material for researchers regarding biomedical applications. In this study, the engineered recombinant spider silk protein eADF4(C16) was modified with the integrin recognition sequence RGD by a genetic (fusing the amino acid sequence GRGDSPG) as well as a chemical approach (using the cyclic peptide c(RGDfK)). Both modified silk proteins were processed into films, and thereafter characterized concerning secondary structure, water contact angle and surface roughness.
No influence of the RGD-modifications on any of these film properties could be detected. However, attachment and proliferation of BALB/3T3 mouse fibroblasts were significantly improved on films made of the RGDmodified silk proteins. Interestingly, the genetically created hybrid protein (with a linear RGD sequence) showed similar or slightly better cell adhesion properties as the silk protein chemically modified with the cyclic RGD peptide.