



@article {2381,
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	journal = {Journal of Biomaterials Science, Polymer EditionJ. Biomater. Sci. Polym. Ed.},
	volume = {18},
	year = {2007},
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},
	month = {2007///},
	pages = {469 - 485},
	abstract = {Chitosan (Ch) is being actively investigated as a non-protein template for the growth of an increasing number of anchorage-dependent cells, including chondrocytes and bone cells. In the present work, Ch films with degrees of N-acetylation (DAs) in the range of 4 to 49\% were evaluated with respect to the attachment, spreading and short-term proliferation of osteoblasts, using human osteoblastic MG-63 cells. The films were characterized in terms of surface morphology and surface charge by atomic force microscopy and streaming potential measurements, respectively. Cell attachment was assessed after 3 and 24 h of cell culture. After 24 h of incubation, cell attachment was found to be dependent on the DA, lower DAs favouring cell adhesion. With time, cell spreading and cytoskeleton organization were only attained for DAs <= 13\%. Regarding cell proliferation, cells grown on films with the lowest DA (4\%) revealed a higher specific growth rate as compared to those grown on films with higher DAs. Films with a DA of 49\% failed to sustain cell proliferation. In addition, a longer lag-phase was observed on Ch, as compared to TCPS, in accordance to an observed delay of cell spreading. The present findings revealed that differences in the DA as small as 9\% may be critical in terms of the osteoblast response to two-dimensional Ch-based matrices. {\textcopyright} 2007 VSP.},
	keywords = {Acetylation, AFM, article, Atomic force microscopy, Biocompatible Materials, biofilm, Biofilms, biomaterial, bone cell, cartilage cell, cell adhesion, cell anchorage, Cell culture, cell growth, Cell Line, Tumor, cell proliferation, Cell Shape, cell spreading, cell survival, Chemical structure, chemistry, Chitin, chitosan, comparative study, controlled study, cytoskeleton, Degree of acetylation, drug effect, Growth kinetics, human, human cell, Humans, incubation time, metabolism, Microscopy, Atomic Force, osteoblast, Osteoblast-like cells, Osteoblasts, Pathology, priority journal, Surface charge, Surface Properties, surface property, Surface treatment, tumor cell line, Zeta potential},
	isbn = {09205063 (ISSN)},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-34347375992\&partnerID=40\&md5=437b9ed270e859425b76aa3655c611be},
	author = {Amaral, I.F. and Cordeiro, A.L. and Sampaio, P. and Barbosa, M.A.}
}
