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. 2020 Apr 16;10:6693. doi: 10.1038/s41598-020-63068-7

Figure 2.

Figure 2

ASCs-Exos promoted collagen expression and secretion during wound healing in vivo. Evaluation of collagen synthesis secretion of wounds following treatment with PBS, injected locally or intravenously with exosomes at Day 1, 7, 14, 21 post-wounding, untreated animals served as control (A). Immunohistochemical and RT-PCR analysis of collagen synthesis of fibroblasts. The results of immunohistochemical analysis of collagen I (B) and collagen III (C) were same as above (arrows indicate Col I or Col III positive), with collagen I (D) and collagen III (E) were obviously upregulated in the early stage. *P ≤ 0.05; NS: no significant difference.