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Mesenchymal stem cell-derived secretome and extracellular vesicles. IL: interleukin; TGF-β: transforming growth factor beta; PGE2: prostaglandins E2; VEGF: vascular endothelial growth factor; BDNF: brain-derived neurotrophic factor; NGF: nerve growth factor; HGF: hepatocyte growth factor; IGF: insulin-derived growth factor; STC-1: stanniocalcin-1; SFRP2: secreted frizzled-related protein 2.
