Journal
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volume 366, Issue 2, Pages 471-475Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2007.11.140
Keywords
TAZ; fibroblast growth factor-2; osteoblast differentiation; MAP kinase signaling
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Transcriptional coactivator with PDZ-binding motif (TAZ) protein is a coactivator of Runx2 and corepressor of PPAR gamma. It also induces differentiation of mesenchymal cells into osteoblasts. In this study, we found that FGF-2, which inhibits bone mineralization and stimulates cell proliferation, reduced the TAZ protein expression level in osteoblast-like cells, MC3T3-E1. This reduction was recovered by removing FGF-2 from the culture medium, which also restored the osteoblastic features of MC3T3-E1 cells. Furthermore, FGF2-induced reduction of TAZ is blocked by a SAPK/JNK-specific inhibitor. These findings suggest that the expression of TAZ protein is involved in osteoblast proliferation and differentiation. This may help elucidate the discrepancies in the effect of FGF-2 and contribute to the understanding of FGF/FGFR-associated craniosynostosis syndrome etiology and treatment. (c) 2007 Elsevier Inc. All rights reserved.
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