Paracrine Signaling (Cytokine-Mediated Regenerative Response) (None)

Paracrine signaling is a form of cell-to-cell communication in which cells produce signals—such as cytokines—that affect nearby target cells within the same tissue or microenvironment. In the context of regeneration, paracrine signaling refers to the release of biologically active molecules (notably cytokines and growth factors) by one cell type, such as stem or immune cells, to influence neighboring cells and orchestrate tissue repair and regeneration. Key cytokines involved include interleukins (e.g., IL-6), chemokines, VEGF, and FGF. Paracrine cytokine signaling is critical for promoting proliferation and differentiation of resident progenitor/stem cells, enhancing cytoprotection/survival after injury, stimulating neovascularization/angiogenesis, modulating inflammatory responses, and limiting fibrosis/scarring by influencing fibroblast activity. The composition of the paracrine secretome adapts over time following injury. Early phases are dominated by pro-inflammatory signals; later phases shift toward anti-inflammatory/regenerative cues.

Other names

Cytokine-mediated cell communicationParacrine signaling in tissue regenerationRegenerative paracrine signaling

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