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08:01
Stimulation of Notch Signaling in Mouse Osteoclast Precursors
Published on: February 28, 2017
Cell adhesion signaling regulates RANK expression in osteoclast precursors
Ayako Mochizuki1, Masamichi Takami, Yoichi Miyamoto
1Department of Biochemistry, School of Dentistry, Showa University, Shinagawa, Tokyo, Japan.
Plos One
|November 10, 2012
Summary
Cell adhesion is crucial for osteoclast differentiation. Adherent conditions increase receptor activator of NF-κB (RANK) expression, enabling RANK ligand (RANKL) to induce osteoclast formation in precursors.
Area of Science:
- Cell Biology
- Immunology
- Biochemistry
Background:
- Osteoclast differentiation is essential for bone remodeling.
- Receptor activator of NF-κB (RANK) and its ligand (RANKL) are key regulators.
- The role of cell adhesion in this process is not fully understood.
Purpose of the Study:
- To investigate the mechanism by which cell adhesion signaling influences osteoclast differentiation.
- To determine if cell adhesion affects RANK expression in osteoclast precursors.
Main Methods:
- Mouse bone marrow-derived macrophages (BMMs) were cultured under adherent and non-adherent conditions.
- Osteoclast differentiation was induced by RANKL stimulation.
- RANK expression and NF-κB signaling pathways were analyzed.
- The effect of echistatin on cell adhesion and RANK expression was examined.
Main Results:
- Osteoclast differentiation was significantly reduced under non-adherent conditions.
- RANK expression was higher in adherent BMMs compared to non-adherent BMMs.
- Cell adhesion signaling interruption decreased RANK expression.
- Forced expression of RANK or TRAF6 induced osteoclast differentiation even without cell adhesion.
Conclusions:
- Cell adhesion signaling is critical for regulating RANK expression in osteoclast precursors.
- This regulation is essential for RANKL-induced osteoclast differentiation.
- Findings elucidate a novel mechanism linking cell adhesion to bone metabolism.
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