Paracrine Signaling Pathways

Paracrine signaling pathways are a form of cell-to-cell communication in which a cell produces and releases signaling molecules (paracrine factors) that act on nearby target cells, inducing changes in their behavior or function. Unlike endocrine signals, which travel long distances via the bloodstream, paracrine signals act locally and affect only cells within a short range of the secreting cell. Key features include local action, short-lived signals, and specificity. Major families of paracrine factors include Fibroblast Growth Factor (FGF), Hedgehog, Wnt, and TGF-beta Superfamily. Examples include synaptic signaling and growth factor signaling. These pathways are essential for coordinating complex behaviors such as localized tissue repair, immune response modulation, developmental patterning, and regulation of stem/progenitor cell niches.

Other names

Local signalingShort-range cell signaling