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Cartilage tissue engineering using pre-aggregated human articular chondrocytes

Wolf, F. and Candrian, C. and Wendt, D. and Farhadi, J. and Heberer, M. and Martin, I. and Barbero, A.. (2008) Cartilage tissue engineering using pre-aggregated human articular chondrocytes. European cells & materials, Vol. 16. pp. 92-99.

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Official URL: http://edoc.unibas.ch/dok/A5251319

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Abstract

In this study, we first aimed at determining whether human articular chondrocytes (HAC) proliferate in aggregates in the presence of strong chondrocyte mitogens. We then investigated if the aggregated cells have an enhanced chondrogenic capacity as compared to cells cultured in monolayer. HAC from four donors were cultured in tissue culture dishes either untreated or coated with 1% agarose in the presence of TGFbeta-1, FGF-2 and PDGF-BB. Proliferation and stage of differentiation were assessed by measuring respectively DNA contents and type II collagen mRNA. Expanded cells were induced to differentiate in pellets or in Hyaff-11 meshes and the formed tissues were analysed biochemically for glycosaminoglycans (GAG) and DNA, and histologically by Safranin O staining. The amount of DNA in aggregate cultures increased significantly from day 2 to day 6 (by 3.2-fold), but did not further increase with additional culture time. Expression of type II collagen mRNA was about two orders of magnitude higher in aggregated HAC as compared to monolayer expanded cells. Pellets generated by aggregated HAC were generally more intensely stained for GAG than those generated by monolayer-expanded cells. Scaffolds seeded with aggregates accumulated more GAG (1.3-fold) than scaffolds seeded with monolayer expanded HAC. In conclusion, this study showed that HAC culture in aggregates does not support a relevant degree of expansion. However, aggregation of expanded HAC prior to loading into a porous scaffold enhances the quality of the resulting tissues and could thus be introduced as an intermediate culture phase in the manufacture of engineered cartilage grafts.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Department of Biomedicine, University Hospital Basel > Tissue Engineering (Martin)
03 Faculty of Medicine > Bereich Operative Fächer (Klinik) > Bewegungsapparat und Integument > Plastische, rekonstruktive, ästhetische und Handchirurgie (Schaefer)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Operative Fächer (Klinik) > Bewegungsapparat und Integument > Plastische, rekonstruktive, ästhetische und Handchirurgie (Schaefer)
03 Faculty of Medicine > Bereich Operative Fächer (Klinik) > Ehemalige Einheiten Operative Fächer (Klinik) > Chirurgische Forschung (Heberer)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Operative Fächer (Klinik) > Ehemalige Einheiten Operative Fächer (Klinik) > Chirurgische Forschung (Heberer)
UniBasel Contributors:Heberer, Michael and Farhadi, Jian and Martin, Ivan
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:European Cells & Materials
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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Last Modified:31 Dec 2015 10:44
Deposited On:22 Mar 2012 13:39

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