Sema3A secreted by sensory nerve induces bone formation under mechanical loads / 国际口腔科学杂志·英文版
International Journal of Oral Science
; (4): 5-5, 2024.
Article
in En
| WPRIM
| ID: wpr-1010718
Responsible library:
WPRO
ABSTRACT
Bone formation and deposition are initiated by sensory nerve infiltration in adaptive bone remodeling. Here, we focused on the role of Semaphorin 3A (Sema3A), expressed by sensory nerves, in mechanical loads-induced bone formation and nerve withdrawal using orthodontic tooth movement (OTM) model. Firstly, bone formation was activated after the 3rd day of OTM, coinciding with a decrease in sensory nerves and an increase in pain threshold. Sema3A, rather than nerve growth factor (NGF), highly expressed in both trigeminal ganglion and the axons of periodontal ligament following the 3rd day of OTM. Moreover, in vitro mechanical loads upregulated Sema3A in neurons instead of in human periodontal ligament cells (hPDLCs) within 24 hours. Furthermore, exogenous Sema3A restored the suppressed alveolar bone formation and the osteogenic differentiation of hPDLCs induced by mechanical overload. Mechanistically, Sema3A prevented overstretching of F-actin induced by mechanical overload through ROCK2 pathway, maintaining mitochondrial dynamics as mitochondrial fusion. Therefore, Sema3A exhibits dual therapeutic effects in mechanical loads-induced bone formation, both as a pain-sensitive analgesic and a positive regulator for bone formation.
Full text:
1
Database:
WPRIM
Main subject:
Osteogenesis
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Cell Differentiation
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Trigeminal Ganglion
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Bone Remodeling
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Semaphorin-3A
Limits:
Humans
Language:
En
Journal:
International Journal of Oral Science
Year:
2024
Document type:
Article