Abstract
Intercellular communication between cells within bone is essential for the regulation of bone homeostasis. Growing evidence reveals that semaphorins have crucial roles in this process, including osteoclastic bone resorption and osteoblastic bone formation. Semaphorin 4D (Sema4D), derived from osteoclasts, has a potent inhibitory effect on osteoblast differentiation without hampering osteoclastic bone resorption. Sema3A, which is highly expressed in osteoblast lineage cells, maintains bone homeostasis by simultaneously inhibiting osteoclast differentiation and promoting osteoblast differentiation. Sema3A also has a role in the regulation of innervation, indicating the importance of future studies on the interactions among bone cells and neurons. Other semaphorins and their receptors have also been implicated in bone metabolism. These studies provide a scientific basis for future therapeutic approaches to bone diseases.
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Hayashi, M., Nakashima, T., Takayanagi, H. (2015). Semaphorins in Bone Homeostasis. In: Kumanogoh, A. (eds) Semaphorins. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54385-5_8
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DOI: https://doi.org/10.1007/978-4-431-54385-5_8
Publisher Name: Springer, Tokyo
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