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• W2066966215 abstract "Preservation of the chondrocytic phenotype in vitro requires a 3D (three-dimensional) culture model. Diverse biomaterials have been tested as scaffolds for culture of animal chondrocytes; however, to date, none is considered a gold standard in regenerative medicine. Here, we studied the fine structure and the GAGs (glycosaminoglycans) content of human chondrocytes encapsulated in alginate beads by using electron microscopy and radioactive sulfate [35S] incorporation, respectively. Cells were obtained from human cartilage, encapsulated in alginate beads and cultured for 28 days. [35S]Na2SO4 was added to the culture media and later isolated for quantification of the sulfated GAGs found in three compartments: IC (intracellular), IB (intra-bead) and EB (extra-bead). Round cells were seen isolated or forming small groups throughout the alginate. Human chondrocytes presented the features of active cells such as euchromatic nuclei, abundant RER (rough endoplasmic reticulum) and many transport vesicles. We observed an extracellular matrix rich in collagen fibres and electrondense material adjacent to the cells. Most of the GAGs produced (74%) were found in the culture medium (EB), indicating that alginate has a limited capacity to retain the GAGs. CS (chondroitin sulfate), the major component of aggrecan, was the most prominent GAG produced by the encapsulated cells. Human chondrocytes cultured in alginate can sustain their phenotype, confirming the potential application of this biomaterial for cartilage engineering." @default.
• W2066966215 created "2016-06-24" @default.
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• W2066966215 date "2011-02-08" @default.
• W2066966215 modified "2023-09-28" @default.
• W2066966215 title "Fine structure and molecular content of human chondrocytes encapsulated in alginate beads" @default.
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• W2066966215 doi "https://doi.org/10.1042/cbi20100273" @default.
• W2066966215 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20874706" @default.
• W2066966215 hasPublicationYear "2011" @default.
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