Fig. 2

Morroniside improves the structural damage and TH levels in the substantia nigra of PD mice. (A) HE staining of the substantia nigra (n = 3 per group). (B) Ultrastructure of the substantia nigra under TEM (red arrows indicate mitochondrial fixation and blue arrows indicate nerve fiber lysis, n = 3 per group). (C) IHC for TH in the substantia nigra (n = 6 per group). (D) TH expression level statistics (n = 6 per group). Data are shown as mean values ± SD, *p < 0.05, **p < 0.01