Mesenchymal stem cell-mediated paracrine signaling (MSC-mediated paracrine signaling)

Mesenchymal stem cell-mediated paracrine signaling refers to the process by which mesenchymal stem cells secrete bioactive molecules—such as growth factors, cytokines, chemokines, extracellular vesicles including exosomes—that act on neighboring cells. This secretion modulates immune responses by promoting anti-inflammatory macrophage polarization and regulatory T-cell induction. It also supports tissue repair through enhanced angiogenesis and inhibition of inflammatory pathways. The overall effect helps restore homeostasis in damaged tissues and has therapeutic potential in conditions like osteoarthritis and other inflammatory or degenerative diseases. The mechanism involves complex interactions between multiple secreted factors rather than targeting a single receptor or enzyme.[1][2][3]

Other names

Paracrine effect of mesenchymal stem cellsMSC secretome-mediated effectsMesenchymal stromal cell-derived paracrine signaling

Not applicable as this is not a drug target per se; however, mechanisms include secretion of soluble factors such as prostaglandin E2 (PGE2), indoleamine 2,3-dioxygenase (IDO), exosomes containing microRNAs and proteins that modulate immune responses and promote tissue repair.