



@article {2444,
	title = {Rat bone marrow stromal cell osteogenic differentiation and fibronectin adsorption on chitosan membranes: The effect of the degree of acetylation},
	journal = {Journal of Biomedical Materials Research - Part AJ. Biomed. Mater. Res. Part A},
	volume = {75},
	year = {2005},
	note = {Cited By (since 1996): 25Export Date: 21 November 2012Source: ScopusCODEN: JBMRCdoi: 10.1002/jbm.a.30436PubMed ID: 16092111Language of Original Document: EnglishCorrespondence Address: Amaral, I.F.; INEB-Instituto de Engenharia Biom{\'e}dica, Laborat{\'o}rio de Biomateriais, Rua do Campo Alegre, 823, 4150-180 Porto, Portugal; email: iamaral@ineb.up.ptChemicals/CAS: chitosan, 9012-76-4; fibronectin, 86088-83-7; polystyrene, 9003-53-6; Chitosan, 9012-76-4; Coated Materials, Biocompatible; FibronectinsReferences: VandeVord, P.J., Matthew, H.W.T., DeSilva, S.P., Mayton, L., Wu, B., Wooley, P.H., Evaluation of the biocompatibility of a chitosan scaffold in mice (2002) J Biomed Mater Res, 59 (3), pp. 585-590;Muzzarelli, R.A.A., Human enzymatic activities related to the therapeutic administration of chitin derivatives (1997) Cell Mol Life Sci, (53), pp. 131-140; 
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},
	month = {2005///},
	pages = {387 - 397},
	abstract = {Cell adhesion, migration, and proliferation of a few anchorage-dependent cells cultured on chitosan (Ch) matrices are influenced by the degree of N-acetylation (DA) of Ch. In the present work, we examined the influence of the DA on the attachment, spreading, proliferation, and osteogenic differentiation of rat bone marrow stromal cells (rBM-SCs). Ch membranes were characterized in terms of surface morphology, roughness, and wettability, and in terms of adsorption of an adhesive protein, fibronectin (Fn). Chs with DAs in the range of 4 to 49\% were used. Among the Ch samples, the DA of 4\% led to the highest Fn surface concentration, both from single protein solution and from diluted serum. Furthermore, the levels of Fn adsorbed from serum found for this DA were threefold higher than for the tissue culture polystyrene control, indicating that in the presence of competitive proteins Ch is more specific toward Fn adsorption than tissue culture polystyrene. rBMSCs cultured on Ch carrying a DA of 4\% were able to spread, proliferate, and differentiate, reaching a higher level of osteogenic differentiation than on the control, despite the lower cell attachment observed for all Ch samples. Because the Ch sample with a DA of 4\% showed the highest Fn adsorption from serum, we suggest that cell adhesion, spreading, and osteogenic differentiation of rBMSCs on Ch may be mediated by the adsorbed layer of Fn. {\textcopyright} 2005 Wiley Periodicals, Inc.},
	keywords = {Acetylation, Adhesion, Adsorption, animal cell, Animals, article, artificial membrane, binding affinity, binding competition, Bone, bone development, bone marrow cell, Bone Marrow Cells, Bone marrow stomal cells, Bone marrow stromal cells, cell adhesion, cell anchorage, Cell culture, cell differentiation, Cell membranes, cell migration, cell proliferation, Cell Shape, cell spreading, chitosan, Coated Materials, Biocompatible, controlled study, cytoskeleton, Degree of acetylation, Fibronectin, Fibronectins, male, materials testing, morphology, nonhuman, polystyrene, Proteins, rat, Rats, Rats, Wistar, roughness, stroma cell, Stromal Cells, Surface Properties, surface property, Tissue culture, wettability},
	isbn = {00219304 (ISSN)},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-26844551535\&partnerID=40\&md5=fa91e3e29d946053ae7bb231b6a2640e},
	author = {Amaral, I.F. and Lamghari, M. and Sousa, S.R. and Sampaio, P. and Barbosa, M.A.}
}
