Fig. 3

In vivo tracing of PKH26 fluorescent dye-labeled MSCs and exosomes. a Localization of PKH26 dye after the injection of PKH26-labeled MSC (arrow). White box showed the magnified image of the place where PKH was observed in the lung. b Presence of PKH26 dye in the liver specimen and their co-localization with FITC-stained F4/80-positive cells after the injection of PKH26-labeled exosomes (arrow). i) PKH26 after the injection of PKH26 labeled-exosomes, ii) FITC-stained F4/80-positive cells, iii) merged image of FITC-stained F4/80-positive cells and PKH-labeled exosomes, and iv) merged image of PKH26, F4/80-positive cells, PKH26, and DAPI