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Identification of human umbilical cord mesenchymal stem cells exosomes (HUC‐MSCs‐Exos). (A) Morphology and microstructure of HUC‐MSCs‐Exos under transmission electron microscopy. (B) Diameter and concentration count of HUC‐MSCs‐Exos. (C) Western blot results of HUC‐MSCs‐Exos markers. (D) EdU assay for the effect of HUC‐MSCs‐Exos on human fibroblasts. Blue, DAPI; Green, EdU. E: Percentage of EdU positive cells counted in D. EX, HUC‐MSCs‐Exos. ***, p < 0.001.
