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Enhancing the biocompatibility of silicone-polycarbonate urethane based implant materials

  • Polyurethane-bases block copolymers (TPCUs) are block-copolymers with systematically varied soft and hard segments. They have been suggested to serve as material for chondral implants in joint regeneration. Such applications may require the adhesion of chondrocytes to the implant surface, facilitating cell growth while keeping their phenotype. Thus, aims of this work were (1) to modify the surface of soft biostable polyurethane-based model implants (TPCU and TSiPCU) with high-molecular weight hyaluronic acid (HA) using an optimized multistep strategy of immobilization, and (2) to evaluate bioactivity of the modified TPCUs in vitro. Our results show no cytotoxic potential of the TPCUs. HAbioactive molecules (Mw =700kDa) were immobilized onto the polyurethane surface via polyethylenimine (PEI) spacers, and modifications were confirmed by several characterization methods. Tests with porcine chondrocytes indicated the potential of the TPCU-HA for inducing enhanced cell proliferation.

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Author of HS ReutlingenAthanasopulu, Kiriaki; Kutuzova, Larysa; Thiel, Joana; Lorenz, Günter; Kemkemer, Ralf
Erschienen in:Current directions in biomedical engineering
Publisher:De Gruyter
Place of publication:Berlin
Document Type:Journal article
Publication year:2019
Page Number:4
First Page:453
Last Page:456
DDC classes:570 Biowissenschaften, Biologie
Open access?:Ja
Licence (German):License Logo  Creative Commons - CC BY-ND - Namensnennung - Keine Bearbeitungen 4.0 International