Fig. 4From: Effect study of exosomes derived from platelet-rich plasma in the treatment of knee cartilage defects in ratsA HE staining results of cartilage defect repair tissue. Scale bar 100 μm, B chondrocyte counted at 5 weeks, C chondrocyte counted at 10 weeks. *P < 0.05 compared to control group. #P < 0.05 compared with PRP-exos (50 μg/ml) group. & P < 0.05 compared with PRP-exos (5 μg/ml) groupBack to article page