Human articular chondrocytes suppress in vitro proliferation of anti-CD3 activated peripheral blood mononuclear cells.

Abstract : OBJECTIVE: To investigate whether mature human articular chondrocytes (AC) exhibit an antiproliferative effect on activated peripheral blood mononuclear cells (PBMC) and to compare this effect with other cells of mesenchymal origin. METHODS: AC from healthy cadaveric cartilage were grown for different passages, in the absence (control) or presence of factors enhancing cell de-differentiation (transforming growth factor (TGF)beta1, fibroblast growth factor (FGF)-2, and platelet derived growth factor (PDGF)bb-TFP medium). Cell ability to suppress PBMC proliferation driven by anti-CD3 antibody was measured by tritiated thymidine uptake following incubation for 48 h at different PBMC:AC ratios and expressed as percent of residual proliferation (RP). AC antiproliferative effect was compared to that of control dermal fibroblasts (DF) and bone marrow stromal cells (BMSC). RESULTS: AC exhibited a cell number-dependent antiproliferative effect. The strongest effect (up to 2% RP) was measured using the least expanded AC cultures. The use of TFP medium for AC expansion resulted in a significantly lower antiproliferative effect, in the range of that induced by BMSC (up to 18% RP). Also DF induced a marked antiproliferative effect (up to 11% RP). CONCLUSION: We report for the first time that human AC have a marked antiproliferative effect on anti-CD3 stimulated PBMC, which is reduced upon culture in medium-inducing extensive cell de-differentiation. These results reflect the immunosuppressive properties observed for other different mesenchymal cell types and raise the question of a potential common physiological role in local tissue protection.
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Journal of Cellular Physiology, Wiley, 2006, 209 (3), pp.732-4. 〈10.1002/jcp.20789〉
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Soumis le : jeudi 15 avril 2010 - 14:17:10
Dernière modification le : lundi 9 juillet 2018 - 13:12:02

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Chiara Bocelli-Tyndall, Andrea Barbero, Christian Candrian, Rhodri Ceredig, Alan Tyndall, et al.. Human articular chondrocytes suppress in vitro proliferation of anti-CD3 activated peripheral blood mononuclear cells.. Journal of Cellular Physiology, Wiley, 2006, 209 (3), pp.732-4. 〈10.1002/jcp.20789〉. 〈inserm-00473507〉

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