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Endothelial cell adhesion on polyurethanes containing covalently attached RGD-peptides
H B Lin1, C García-Echeverría, S Asakura
1Department of Chemical Engineering, University of Wisconsin, Madison 53706.
Biomaterials
|January 1, 1992
Summary
Researchers grafted cell-adhesive peptides, Arg-Gly-Asp-Ser (RGDS) and Arg-Gly-Asp-Val (RGDV), onto polyurethane. The modified surfaces enhanced human umbilical vein endothelial cell (HUVEC) adhesion and spreading, showing potential for biomaterial applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Cell Biology
Background:
- Polyurethane materials lack inherent cell-adhesion properties, limiting their use in biomedical applications.
- Cell adhesion is mediated by specific peptide sequences found in extracellular matrix proteins like fibronectin and vitronectin.
- Modifying polymer surfaces with cell-adhesive peptides can improve biocompatibility and promote cellular interactions.
Purpose of the Study:
- To covalently graft Arg-Gly-Asp-Ser (RGDS) and Arg-Gly-Asp-Val (RGDV) peptides onto a polyurethane backbone.
- To characterize the peptide-grafted polyurethane surfaces using various spectroscopic and surface analysis techniques.
- To evaluate the effect of peptide grafting on human umbilical vein endothelial cell (HUVEC) attachment and spreading.
Main Methods:
- Covalent grafting of RGDS and RGDV peptides to polyurethane via amide bonds.
- Characterization using Nuclear Magnetic Resonance (NMR), Fourier-transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and dynamic contact angle analysis.
- Assessment of HUVEC adhesion and spreading on modified and unmodified polyurethane surfaces.
Main Results:
- Successful covalent attachment of peptides to the polyurethane backbone was confirmed.
- Surface analysis indicated successful peptide grafting and enrichment at the polymer-water interface.
- Peptide-grafted polyurethanes significantly enhanced HUVEC attachment and spreading, even in serum-free conditions.
- The RGDV-grafted substrate showed superior cell adhesion and spreading compared to the RGDS-grafted substrate.
Conclusions:
- Covalent grafting of RGD-containing peptides onto polyurethane creates a more polar and cell-adhesive surface.
- These peptide-grafted polyurethanes effectively support endothelial cell adhesion and spreading.
- The RGDV-grafted polyurethane demonstrates promising potential as a biomaterial for tissue engineering and regenerative medicine applications.