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. 2024 Mar 27;628(8008):604–611. doi: 10.1038/s41586-024-07237-y

Extended Data Fig. 10. Summary of the neuro-immune-regenerative axis after acute injury in skin and muscle.

Extended Data Fig. 10

The schematic shows the proposed mechanisms by which nociceptors promote tissue healing via controlling neutrophils and monocytes/macrophages (Mo/Mϕ) in injured tissues. Following tissue injury, CGRP-expressing nociceptor endings grow into the granulation tissue. CGRP signalling in neutrophils and macrophages induces the release of the ECM protein TSP-1. TSP-1 is deposited in the injured tissue milieu inhibiting neutrophil and monocytes/macrophage migration and eventually accelerating the cell death response of neutrophils and macrophages to inflammatory cytokines. In addition, CGRP promotes efferocytosis and macrophage polarization into a M2-like phenotype via an autocrine or paracrine effect of TSP-1. Overall, nociceptors are critical for the transition of the injured tissue microenvironment towards a tissue healing phase. Blue line indicates inhibition, red line indicates induction. Dashed grey lines indicate that CGRP and TSP-1 may also promote tissue healing by acting on non-immune cells. Created with BioRender.com.