Fig. 8.

Histological images of animal experiments. A, B) Representative images of H&E and Safranin O-fast green staining showing the histological changes of the NP tissues in different groups. C, D) Comparison of the histological grades in different groups at different time points. *p < 0.05 Vs. blank group, ^#p < 0.001 Vs. MS@MCL group, NS Vs. MS@MCL group, not significant. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)