



@article {2571,
	title = {Flow cytometry analysis of effects of glass on response of osteosarcoma cells to plasma-sprayed hydroxyapatite/CaO-P                    2O
                    5 coatings
},
	journal = {Journal of Biomedical Materials ResearchJ. Biomed. Mater. Res.},
	volume = {47},
	year = {1999},
	note = {Cited By (since 1996): 22Export Date: 21 November 2012Source: ScopusCODEN: JBMRBdoi: 10.1002/(SICI)1097-4636(19991215)47:4<603::AID-JBM18>3.0.CO;2-6PubMed ID: 10497297Language of Original Document: EnglishCorrespondence Address: Olsen, I.; Department of Periodontology, Eastman Dental Institute, University of London, 256 Gray{\textquoteright}s Inn Road, London WC1X 8LD, United KingdomChemicals/CAS: Bone Substitutes; Coated Materials, Biocompatible; HydroxyapatitesReferences: Passuti, N., Daculsi, G., Martin, S., Macroporous calcium phosphate ceramics for long bone surgery in human and dogs - Clinical and histological studies (1990) Clinical Implant Materials, pp. 255-258. , Soltesz V, Lee A, editors. Amsterdam: Elsevier Sciesnce Publishers;Legeros, R., Calcium phosphate materials in restorative dentistry. A review (1988) Adv Dent Res, 2, pp. 164-180; 
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},
	month = {1999///},
	pages = {603 - 611},
	publisher = {John Wiley \& Sons Inc},
	abstract = {Multilayered coatings composed of mixtures of hydroxyapatite (HA) and P                        2O
                        5-based bioactive glasses offer potential clinical benefits in orthopedic and dental surgery. In this study double-layer plasma-sprayed coatings were prepared and the biological response evaluated in tissue culture using two human osteosarcoma cell lines, MG63 and HOS TE85 (HOS). The cells were cultured on the materials and the effects on cell growth were determined using a spectrophometric assay of a mitochondrial enzyme that is active in viable cells. While none of the materials influenced the growth of the MG63 cells, the HOS cells appeared to undergo less proliferation on all the HA materials. Flow cytometry analysis was carried out using rabbit antibodies against osteonectin, osteopontin, bone sialoprotein, fibronectin, and collagen type I to measure the effects of the materials on key cellular functions. The results showed that the materials downregulated the expression of these extracellular matrix antigens by MG63 cells whereas they had less effect on the HOS cells compared to the same cells incubated on a plastic surface. Notably, with both cell lines the composite with the higher percentage of glass restored the production of connective tissue proteins to levels that were more similar to those present in the control cells.
In this study, double-layer plasma-sprayed coatings were prepared and the biological response evaluated in tissue culture using two human osteosarcoma cell lines, MG63 and HOS TE85 (HOS). The materials downregulated the expression of the extracellular matrix antigens by MG63 cells whereas they had less effect on the HOS cells compared to the same cells incubated on a plastic surface. Notably, with both cell lines the composite with the higher percentage of glass restored the production of connective tissue proteins to levels that were more similar to those present in the control cells.
},
	keywords = {Animals, Antibodies, antigen expression, article, Bioassay, Biomaterials, Bone cells, Bone sialoprotein, Bone Substitutes, calcium phosphate, cancer cell culture, Cell Division, cell function, cell granule, cell growth, cell proliferation, Cell size, Cells, Coated Materials, Biocompatible, Collagen, collagen type 1, connective tissue, controlled study, dentistry, enzyme activity, Enzymes, Fibronectin, flow cytometry, Flow cytometry analysis, glass, Growth kinetics, human, human cell, Humans, hydroxyapatite, Hydroxyapatite-glass, Hydroxyapatites, Incubation, Mitochondrial enzyme, orthopedics, Osteoblasts, osteonectin, Osteopontin, Osteosarcoma, osteosarcoma cell, Osteosarcoma cells, Phosphates, Proliferation, Proteins, Rabbits, sialoprotein, Spectrophometric assay, Tissue culture, Tumor Cells, Cultured},
	isbn = {00219304 (ISSN)},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0031573504\&partnerID=40\&md5=c6bbcda19f6e76323d16484a9db1c0da},
	author = {Ferraz, M.P. and Knowles, J.C. and Olsen, I. and Monteiro, F.J. and Santos, J.D.}
}
