Mesenchymal stromal cell-mediated tissue regeneration via differentiation and paracrine signaling (MSC-mediated tissue regeneration)

The process described—“Tissue regeneration via differentiation/paracrine signaling by MSCs”—refers to a biological *mechanism* rather than a specific molecular target or receptor. **Mesenchymal stromal cells (MSCs)** are multipotent adult stem cells that contribute to tissue repair mainly through secretion of various paracrine factors (cytokines, growth factors, extracellular vesicles, exosomes) and, to a lesser extent, by differentiating into specialized cells within damaged tissues[1][2][3][4][5][6][7]. Their paracrine actions include modulation of immune responses (e.g., inducing anti-inflammatory macrophage phenotypes, secreting IL-10 and TGF-β), stimulation of angiogenesis, and recruitment of endogenous progenitor cells. While interest in harnessing or mimicking MSC paracrine activity for therapy is high, and several clinical trials target these processes, there is no discrete canonical molecular target that fits standard definitions (e.g., receptor, enzyme), making this entry incorrect if used as a pharmacological or molecular target. Instead, it reflects a complex, multi-factorial mechanism involving cell populations, not a single molecular entity[1][2][3][4].

Other names

MSC paracrine signaling in tissue regenerationMesenchymal stem cell differentiation for tissue repairMSC secretome activity

Secretion of trophic factors (e.g., VEGF, HGF, IGF-1, SDF-1) that promote tissue repair and angiogenesis[5][6] Immunomodulation via secreting anti-inflammatory cytokines (e.g., IL-10, TGF-β)[2][4] Paracrine delivery of proteins, nucleic acids, exosomes, and extracellular vesicles for cellular communication and regeneration[3][7] Direct differentiation into various tissue cell types (limited in vivo evidence)[1][3] Modulation of immune cell phenotype and recruitment (e.g., inducing M2 macrophages)[2][4]