“…Among those, EVs produced by stem cells are the most extensively studied. 120 In the UVBtriggered photoaging and natural senescence models, EVs released by human induced pluripotent stem cells (iPSCs) activated the proliferation and migration of fibroblasts, restored the collagen type I expression, as well as reduced the expression of MMP-1/3 and senescenceassociated β-galactosidase (SA-β-gal), a marker of senescence, in aged human dermal fibroblasts (HDFs), 70 indicating the therapeutic potential of iPSCs-derived EVs in the skin senescence. Mesenchymal stem cells (MSCs) are multipotent stem cells derived from various tissues, including the adipose, bone marrow, and umbilical cord.…”