Figure 8. Prx II−/−DMSC-Exos promoted skin wound healing more effectively than Prx II+/+ DMSC-Exos. (A) Overall observed morphological changes in wound healing after treatment. (B) Wound-area changes during wound healing are shown. *p < 0.05, when compared with Prx II−/− DMSC-Exos. The data shown represent the mean ± SD (n = 6). (C) Histological images (H&E staining) of the wound. Wounds are indicated with dashed lines.