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Updated: May 29, 2026

Stimulation of Notch Signaling in Mouse Osteoclast Precursors
Published on: February 28, 2017
Stretch-inducible expression of connective tissue growth factor (CTGF) in human osteoblasts-like cells is mediated by
Li-Wei Xiao1, Min Yang, Jing Dong
1Stomatological Center, the Second Xiangya Hospital, Central South University, Changsha, China.
Abstract:
To explore the possible role for connective tissue growth factor (CTGF) during tooth movement, we evaluated CTGF gene and protein expression in MG-63 cells subjected to cyclic stretch. Cyclic stretch caused a time-dependent increase in CTGF mRNA and protein levels.Inhibition of p38 MAP kinase or ERK activation did not affect cyclic stretch-induced CTGF expression. Specific inhibitors of PI3K suppressed stretch -induced CTGF expression in a time-dependent manner. cyclic stretch activated JNK and ERK, but not p38 MAP kinase in osteoblast-like cells. PI3K inhibitors suppressed cyclic stretch-induced JNK, but not p38 MAP kinase activation. Finally, SP600125, a Specific Inhibitor of JNK, suppressed stretch -induced CTGF Expression. These results suggest that stretch-induced CTGF expression is mediated through the PI3K-JNK -dependent pathway, not by p38 MAP kinase and ERK pathways.
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