Fig. 7

Histological images of animal experiments. A Representative images of H&E staining. Scale bar = 800 µm. B Representative pictures of Safranin-O/Fast staining at different timepoints. Scale bar = 800 µm. C Representative images of Alcian Blue staining at 4 and 8 weeks after operation. Scale bar = 800 µm. D, E Histological grades at week 4 and week 8 post-surgery in five groups (n = 3, *P < 0.05, **P < 0.01, ***P < 0.001, ns not significant)