Cartilaginous constructs using primary chondrocytes from continuous expansion culture seeded in dense collagen gels. Rosenzweig, D. H., Chicatun, F., Nazhat, S. N., & Quinn, T. M. Acta Biomaterialia, 9(12):9360–9369, 2013. doi abstract bibtex Cell-based therapies such as autologous chondrocyte implantation require in vitro cell expansion. However, standard culture techniques require cell passaging, leading to dedifferentiation into a fibroblast-like cell type. Primary chondrocytes grown on continuously expanding culture dishes (CE culture) limits passaging and protects against dedifferentiation. The authors tested whether CE culture chondrocytes were advantageous for producing mechanically competent cartilage matrix when three-dimensionally seeded in dense collagen gels. Primary chondrocytes, grown either in CE culture or passaged twice on static silicone dishes (SS culture; comparable to standard methods), were seeded in dense collagen gels and cultured for 3 weeks in the absence of exogenous chondrogenic growth factors. Compared with gels seeded with SS culture chondrocytes, CE chondrocyte-seeded gels had significantly higher chondrogenic gene expression after 2 and 3 weeks in culture, correlating with significantly higher aggrecan and type II collagen protein accumulation. There was no obvious difference in glycosaminoglycan content from either culture condition, yet CE chondrocyte-seeded gels were significantly thicker and had a significantly higher dynamic compressive modulus than SS chondrocyte-seeded gels after 3 weeks. Chondrocytes grown in CE culture and seeded in dense collagen gels produce more cartilaginous matrix with superior mechanical properties, making them more suitable than SS cultured cells for tissue engineering applications. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
@article{Rosenzweig20139360,
abstract = {Cell-based therapies such as autologous chondrocyte implantation require in vitro cell expansion. However, standard culture techniques require cell passaging, leading to dedifferentiation into a fibroblast-like cell type. Primary chondrocytes grown on continuously expanding culture dishes (CE culture) limits passaging and protects against dedifferentiation. The authors tested whether CE culture chondrocytes were advantageous for producing mechanically competent cartilage matrix when three-dimensionally seeded in dense collagen gels. Primary chondrocytes, grown either in CE culture or passaged twice on static silicone dishes (SS culture; comparable to standard methods), were seeded in dense collagen gels and cultured for 3 weeks in the absence of exogenous chondrogenic growth factors. Compared with gels seeded with SS culture chondrocytes, CE chondrocyte-seeded gels had significantly higher chondrogenic gene expression after 2 and 3 weeks in culture, correlating with significantly higher aggrecan and type II collagen protein accumulation. There was no obvious difference in glycosaminoglycan content from either culture condition, yet CE chondrocyte-seeded gels were significantly thicker and had a significantly higher dynamic compressive modulus than SS chondrocyte-seeded gels after 3 weeks. Chondrocytes grown in CE culture and seeded in dense collagen gels produce more cartilaginous matrix with superior mechanical properties, making them more suitable than SS cultured cells for tissue engineering applications. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.},
annote = {cited By 14},
author = {Rosenzweig, D. H. and Chicatun, F. and Nazhat, S. N. and Quinn, T. M.},
doi = {10.1016/j.actbio.2013.07.024},
issn = {17427061},
journal = {Acta Biomaterialia},
keywords = {Articular chondrocytes,Dense collagen,Hydrogel,Plastic compression,Tissue engineering},
number = {12},
pages = {9360--9369},
title = {{Cartilaginous constructs using primary chondrocytes from continuous expansion culture seeded in dense collagen gels}},
volume = {9},
year = {2013}
}
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The authors tested whether CE culture chondrocytes were advantageous for producing mechanically competent cartilage matrix when three-dimensionally seeded in dense collagen gels. Primary chondrocytes, grown either in CE culture or passaged twice on static silicone dishes (SS culture; comparable to standard methods), were seeded in dense collagen gels and cultured for 3 weeks in the absence of exogenous chondrogenic growth factors. Compared with gels seeded with SS culture chondrocytes, CE chondrocyte-seeded gels had significantly higher chondrogenic gene expression after 2 and 3 weeks in culture, correlating with significantly higher aggrecan and type II collagen protein accumulation. There was no obvious difference in glycosaminoglycan content from either culture condition, yet CE chondrocyte-seeded gels were significantly thicker and had a significantly higher dynamic compressive modulus than SS chondrocyte-seeded gels after 3 weeks. Chondrocytes grown in CE culture and seeded in dense collagen gels produce more cartilaginous matrix with superior mechanical properties, making them more suitable than SS cultured cells for tissue engineering applications. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.","annote":"cited By 14","author":[{"propositions":[],"lastnames":["Rosenzweig"],"firstnames":["D.","H."],"suffixes":[]},{"propositions":[],"lastnames":["Chicatun"],"firstnames":["F."],"suffixes":[]},{"propositions":[],"lastnames":["Nazhat"],"firstnames":["S.","N."],"suffixes":[]},{"propositions":[],"lastnames":["Quinn"],"firstnames":["T.","M."],"suffixes":[]}],"doi":"10.1016/j.actbio.2013.07.024","issn":"17427061","journal":"Acta Biomaterialia","keywords":"Articular chondrocytes,Dense collagen,Hydrogel,Plastic compression,Tissue engineering","number":"12","pages":"9360–9369","title":"Cartilaginous constructs using primary chondrocytes from continuous expansion culture seeded in dense collagen gels","volume":"9","year":"2013","bibtex":"@article{Rosenzweig20139360,\n abstract = {Cell-based therapies such as autologous chondrocyte implantation require in vitro cell expansion. However, standard culture techniques require cell passaging, leading to dedifferentiation into a fibroblast-like cell type. Primary chondrocytes grown on continuously expanding culture dishes (CE culture) limits passaging and protects against dedifferentiation. The authors tested whether CE culture chondrocytes were advantageous for producing mechanically competent cartilage matrix when three-dimensionally seeded in dense collagen gels. Primary chondrocytes, grown either in CE culture or passaged twice on static silicone dishes (SS culture; comparable to standard methods), were seeded in dense collagen gels and cultured for 3 weeks in the absence of exogenous chondrogenic growth factors. Compared with gels seeded with SS culture chondrocytes, CE chondrocyte-seeded gels had significantly higher chondrogenic gene expression after 2 and 3 weeks in culture, correlating with significantly higher aggrecan and type II collagen protein accumulation. 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