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Fibronectin-mediated Adhesion Rescues Cell-Cycle Arrest Induced by Fibroblast Growth Factor-1 by Decreased Expression of p21cip/waf in Human Chondrocytes

Authors: Jun-Hyeog, Jang; Chong-Pyoung, Chung;

Fibronectin-mediated Adhesion Rescues Cell-Cycle Arrest Induced by Fibroblast Growth Factor-1 by Decreased Expression of p21cip/waf in Human Chondrocytes

Abstract

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.

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Keywords

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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Powered by OpenAIRE graph
citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
11
Average
Average
Average