Pulsed electromagnetic fields mediate sensory nerve regulation for bone formation in aging models.

ABSTRACT: Pulsed electromagnetic fields (PEMFs) enhance bone formation to combat osteoporosis, yet the mechanisms by which they promote bone health during aging remain unclear. This study shows PEMFs enhance new bone formation and innervation, promoting osteogenesis and reducing adipogenesis in mesenchymal stem cells (MSCs) in aging male mice. PEMF-induced osteogenesis is impaired by sensory nerve dysfunction in this model. Mechanistically, PEMFs stimulate sensory nerves to secrete semaphorin 3A (Sema3A), and depleting these nerves or knocking out Sema3a eliminates PEMFs' bone-forming effects. Sema3A interacts with neuropilin-1 (Nrp1) in MSCs that express the leptin receptor, aiding osteogenesis and inhibiting adipogenesis in aging male mice. The activation of the "Sema3A-Nrp1" pathway is central fo

SUBMITTER: Wang T 

PROVIDER: S-EPMC12479840 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature