Figure 5. The expression of c-fos protein determined by western blot in naive, sham, day 7, 14, 21 rats. (A) The western blot results of c-fos and GAPDH were showed. (B) C-fos/GAPDH ratio histogram reveals that the c-fos expression were significantly higher in day 7, day 14, day 21 than in sham group. *p < 0.05, **p < 0.01.