Peptide-modified p(AAm-co-EG/AAc) IPNs grafted to bulk titanium modulate osteoblast behavior in vitro

Interpenetrating polymer networks (IPNs) of poly(acrylamide‐co‐ethylene glycol/acrylic acid) (p(AAm‐co‐EG/AAc) applied to model surfaces prevent protein adsorption and cell adhesion. Subsequently, IPN surfaces functionalized with the RGD cell‐binding domain from rat bone sialoprotein (BSP) modulated...

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Bibliographic Details
Published in:Journal of biomedical materials research 2003-01, Vol.64A (1), p.38-47
Main Authors: Barber, Thomas A., Golledge, Stephen L., Castner, David G., Healy, Kevin E.
Format: Article
Language:English
Subjects:
Amino Acid Sequence
Animals
Biological and medical sciences
Cell Adhesion
Cell Division
Cells, Cultured
Electron Probe Microanalysis
In Vitro Techniques
interpenetrating polymer network
Medical sciences
Microscopy, Fluorescence
Molecular Sequence Data
Osteoblasts - cytology
PEG
Peptides - chemistry
Polymers - chemistry
Rats
RGD
surface modification
Surface Properties
titanium
Titanium - chemistry
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Summary:Interpenetrating polymer networks (IPNs) of poly(acrylamide‐co‐ethylene glycol/acrylic acid) (p(AAm‐co‐EG/AAc) applied to model surfaces prevent protein adsorption and cell adhesion. Subsequently, IPN surfaces functionalized with the RGD cell‐binding domain from rat bone sialoprotein (BSP) modulated bone cell adhesion, proliferation, and matrix mineralization. The objective of this study was to utilize the same biomimetic modification strategy to produce functionally similar p(AAm‐co‐EG/AAc) IPNs on clinically relevant titanium surfaces. Contact angle goniometry and X‐ray photoelectron spectroscopy (XPS) data were consistent with the presence of the intended surface modifications. Cellular response was gauged by challenging the surfaces with primary rat calvarial osteoblast (RCO) surfaces in serum‐containing media. IPN modified titanium and negative control (RGE‐IPN) surfaces inhibit cell adhesion and proliferation, while RGD‐modified IPNs on titanium supported osteoblast attachment and spreading. Furthermore, the latter surfaces supported significant mineralization despite exhibiting lower levels of proliferation than positive control surfaces. These results suggest that with the appropriate optimization, this approach may be practical for surface engineering of osseous implants. © 2002 Wiley Periodicals, Inc. J Biomed Mater Res 64A: 38–47, 2003
ISSN:1549-3296
0021-9304
1552-4965
1097-4636
DOI:10.1002/jbm.a.10321