Fig. 7

Local administration of PEG-CeONP-hUCMSCs effectively promotes recovery of patellar tendon defection. A A schematic drawing of animal experiments. B The appearance of tendon-injured areas. C Masson and HE staining of the tendon with PTD, PTD + hUCMSCs and PTD + PEG-CeONP-hUCMSCs treatment. D Representative fluorescence imaging of intracellular ROS evaluated by DHE probes and mean fluorescence intensity (n = 6). E, F Representative fluorescence imaging of immunofluorescence of TNMD, SCX, COL3A1 and COL1A1 (n = 6). G, H mean fluorescence of immunofluorescence image. NS means not significant versus PTD (n = 6), **p < 0.01 versus Sham, ^##p < 0.01 versus PTD, ^&p < 0.01 versus PTD + hUCMSCs, ^&&p < 0.01 versus PTD+ hUCMSCs