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• W2042835119 abstract "In this investigation, the effect of the degree of acetylation (DA) of chitosan on the behavior of human osteoblastic MG-63 cells cultured in three-dimensional chitosan matrices was assessed. Chitosan sponges with DAs in the range of 4 to 49% were prepared and characterized in terms of microstructure, porosity, and pore size. Collagen sponges were used as 3D control. Cell proliferation was determined using the MTT assay while the retention of the osteoblastic phenotype was monitored by assaying alkaline phosphatase activity. Cell morphology, cytoskeletal organization, and viability were assessed using different microscopy techniques. Chitosan sponges showed a similar microstructure regardless the DA, except for the highest DA used, where a more heterogeneous pore distribution was observed. In terms of cell proliferation, alkaline phosphatase activity and cell viability, cells cultured in chitosan scaffolds performed as well as in the 3D control regardless the DA, except for the highest DA used, where an inhibitory effect on cell proliferation was found. However, while in sponges with DAs < or = 13% cells attached and spread displaying long cell filopodia and numerous cell-to-cell contacts, in sponges with higher DAs cells tended to remain spherical and grow into spheroid-like cellular aggregates. In the present study, the DA played a key role in determining the affinity of osteoblastic cells towards the substrates, possibly by influencing the nature of the initial adsorbed protein layer." @default.
• W2042835119 created "2016-06-24" @default.
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• W2042835119 creator A5031738953 @default.
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• W2042835119 date "2005-11-03" @default.
• W2042835119 modified "2023-10-17" @default.
• W2042835119 title "Three-dimensional culture of human osteoblastic cells in chitosan sponges: The effect of the degree of acetylation" @default.
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• W2042835119 doi "https://doi.org/10.1002/jbm.a.30522" @default.
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• W2042835119 hasPublicationYear "2005" @default.
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