Fibronectin-mediated Adhesion Rescues Cell-Cycle Arrest Induced by Fibroblast Growth Factor-1 by Decreased Expression of p21cip/waf in Human Chondrocytes
doi: 10.1290/0412082 , 10.1290/0412082.1
pmid: 16153144
Fibronectin-mediated Adhesion Rescues Cell-Cycle Arrest Induced by Fibroblast Growth Factor-1 by Decreased Expression of p21cip/waf in Human Chondrocytes
In chondrocytes, fibroblast growth factors (FGFs) inhibit chondrocytes proliferation by upregulation of the cell cycle inhibitor p21(cip/waf). In this report, we first investigated the roles of fibronectin (FN)-mediated cell adhesion in the modulation of FGF-1's antiproliferative function in chondrocytes. In this study, we found that FN-mediated signaling could rescue cell cycle arrest induced by FGF-1 in primary human chondrocytes. This prevention of cell cycle arrest induced by FGF-1 was due to the suppression of the cell cycle inhibitor p21(cip/waf) expression on adhesion to FN and its downstream activation of signaling pathways. Finally, we showed that this rescue induced by FN-mediated adhesion is dependent on the extracellular regulated kinase (ERK) signaling pathway. Taken together, these studies support that, despite FGF-FGF receptor's growth-inhibitory function, the FN-mediated signaling can collaborate to compensate for its negative effect on chondrocytes proliferation, providing evidence for cross talk between signals emerging from these cell surface molecules in chondrocyte.
- Inha University Korea (Republic of)
- Seoul National University Korea (Republic of)
- New Generation University College Ethiopia
Cyclin-Dependent Kinase Inhibitor p21, Cell Cycle, Immunoblotting, Fibronectins, Chondrocytes, Gene Expression Regulation, Cell Adhesion, Fibroblast Growth Factor 1, Humans, Immunoprecipitation, Signal Transduction
Cyclin-Dependent Kinase Inhibitor p21, Cell Cycle, Immunoblotting, Fibronectins, Chondrocytes, Gene Expression Regulation, Cell Adhesion, Fibroblast Growth Factor 1, Humans, Immunoprecipitation, Signal Transduction
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