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Assessment of bioluminescence imaging signals evaluate whether ASCs-Exos can migrate to the wound site. Representative bioluminescence imaging of animals injected with fluorescent labeled exosomes. Dye or PBS after sufferring a back wound (2 × 1.5 cm) were collected at indicated time points of Day 1, 5, 7, 14, 21. To observe the metabolism of dyes in normal mice, dye was injected into the tail vein of the control group.
