Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/20187

TitleModulating bone cells response onto starch-based biomaterials by surface plasma treatment and protein adsorption
Author(s)Alves, C. M.
Yang, Y.
Carnes, D. L.
Ong, J. L.
Sylvia, V. L.
Dean, D. D.
Agrawal, C. M.
Reis, R. L.
KeywordsStarch-based materials
Oxygen-based rfGD
Protein adsorption
Cell adhesion and proliferation
Issue date2007
PublisherElsevier Sci Ltd
JournalBiomaterials
Abstract(s)The effect of oxygen-based radio frequency glow discharge (rfGD) on the surface of different starch-based biomaterials (SBB) and the influence of proteins adsorption on modulating bone–cells behavior was studied. Bovine serum albumin, fibronectin and vitronectin were used in single and complex protein systems. RfGD-treated surfaces showed to increase in hydrophilicity and surface energy when compared to non-modified SBB. Biodegradable polymeric blends of cornstarch with cellulose acetate (SCA; 50/50 wt%), ethylene vinyl alcohol (SEVA-C; 50/50 wt%) and polycaprolactone (SPCL; 30/70 wt%) were studied. SCA and SCA reinforced with 10% hydroxyapatite (HA) showed the highest degree of modification as result of the rfGD treatment. Protein and control solutions were used to incubate with the characterized SBB and, following this, MG63 osteoblast-like osteosarcoma cells were seeded over the surfaces. Cell adhesion and proliferation onto SCA was found to be enhanced for non-treated surfaces and on SCA+10%HA no alteration was brought up by the plasma modification. Onto SCA surfaces, BSA, FN and VN single solutions improved cell adhesion, and this same effect was found upscaled for ternary systems. In addition, plasma treated SEVA-C directed an increase in both adhesion and proliferation comparing to non-treated surfaces. Even though adhesion onto treated and untreated SPCL was quite similar, plasma modification clearly promoted MG63 cells proliferation. Regarding MG63 cells morphology it was shown that onto SEVA-C surfaces the variation of cell shape was primarily defined by the protein system, while onto SPCL it was mainly affected by the plasma treatment.
TypeArticle
URIhttp://hdl.handle.net/1822/20187
DOI10.1016/j.biomaterials.2006.09.010
ISSN0142-9612
Peer-Reviewedyes
AccessOpen access
Appears in Collections:3B’s - Artigos em revistas/Papers in scientific journals

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