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Divalent metal cations stimulate skeleton interoception for new bone formation in mouse injury models
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Divalent metal cations stimulate skeleton interoception for new bone formation in mouse injury models
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Journal Article
Divalent metal cations stimulate skeleton interoception for new bone formation in mouse injury models
2022
Overview
Bone formation induced by divalent metal cations has been widely reported; however, the underlying mechanism is unclear. Here we report that these cations stimulate skeleton interoception by promoting prostaglandin E2 secretion from macrophages. This immune response is accompanied by the sprouting and arborization of calcitonin gene-related polypeptide-α
+
nerve fibers, which sense the inflammatory cue with PGE
2
receptor 4 and convey the interoceptive signals to the central nervous system. Activating skeleton interoception downregulates sympathetic tone for new bone formation. Moreover, either macrophage depletion or knockout of cyclooxygenase-2 in the macrophage abolishes divalent cation-induced skeleton interoception. Furthermore, sensory denervation or knockout of EP4 in the sensory nerves eliminates the osteogenic effects of divalent cations. Thus, our study reveals that divalent cations promote bone formation through the skeleton interoceptive circuit, a finding which could prompt the development of novel biomaterials to elicit the therapeutic power of these divalent cations.
Mechanisms underlying bone formation induced by divalent metal cations remain largely unknown. Here the authors show that these cations can activate the skeleton interoceptive circuit through the immune-neural axis to initiate new bone formation.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 13/51
/ 82/1
/ Animals
/ Cations
/ Circuits
/ Cyclooxygenase 2 - metabolism
/ Fibers
/ Humanities and Social Sciences
/ Ions
/ Mice
/ Musculoskeletal System - metabolism
/ Nerves
/ Science
/ Skeleton
