Chondrocytes; collagen type II; proteoglycans; knee joint; cytoskeleton
Abstract :
[en] For lack of sufficient human cartilage donors, chondrocytes isolated from various animal species are used for cartilage tissue engineering. The present study was undertaken to compare key features of cultured large animal and human articular chondrocytes of the knee joint. Primary chondrocytes were isolated from human, porcine, ovine and equine full thickness knee joint cartilage and investigated flow cytometrically for their proliferation rate. Synthesis of extracellular matrix proteins collagen type II, cartilage proteoglycans, collagen type I, fibronectin and cytoskeletal organization were studied in freshly isolated or passaged chondrocytes using immunohistochemistry and western blotting. Chondrocytes morphology, proliferation, extracellular matrix synthesis and cytoskeleton assembly differed substantially between these species. Proliferation was higher in animal derived compared with human chondrocytes. All chondrocytes expressed a cartilage-specific extracellular matrix. However, after monolayer expansion, cartilage proteoglycan expression was barely detectable in equine chondrocytes whereby fibronectin and collagen type I deposition increased compared with porcine and human chondrocytes. Animal-derived chondrocytes developed more F-actin fibers during culturing than human chondrocytes. With respect to proliferation and extracellular matrix synthesis, human chondrocytes shared more similarity with porcine than with ovine or equine chondrocytes. These interspecies differences in chondrocytes in vitro biology should be considered when using animal models.
Research center :
Department of Trauma and Reconstructive Surgery, Charité-Campus Benjamin Franklin, FEM, Krahmerstrasse 6-10, 12207 Berlin, Germany Department of Cell and Neurobiology, Centre of Anatomy, Charité-University of Medicine, Schumannstrasse 20-21, 10098 Berlin, Germany Equine Clinic, Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Bd de Colonster, 20, 4000 Sart Tilman, Belgium Institute of Veterinary Anatomy, Freie Universität Berlin, Koserstrasse 20, 14195 Berlin, Germany Department of Orthopedic Surgery, Denver Health Medical Center, Denver, CO, USA
Disciplines :
Orthopedics, rehabilitation & sports medicine Human health sciences: Multidisciplinary, general & others
Differing in vitro biology of equine, ovine, porcine and human articular chondrocytes derived from the knee joint: an immunomorphical study.
Publication date :
2009
Journal title :
Histochemistry and Cell Biology
ISSN :
0948-6143
eISSN :
1432-119X
Publisher :
Springer Science & Business Media B.V., New York, United States - New York
Volume :
131
Pages :
219-229
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Rahel Hirsh program of the Charité Medical School, Berlin, Germany Hypatia Program of the Technical University of Applied Sciences Berlin Deutsche Arthrosehilfe e.V. Sonnenfeld Foundation, Berlin
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