Fig. 4

Hippocampal gene expression analysis. Quantitative real-time PCR was performed for the effector genes gli1, hes5, and lef1 of the sonic hedgehog, Notch, and Wnt signaling pathways, respectively, and for the neurogenic factors neuroD6 and ngn1 in short-term- (a) and long-term-treated (b) mice. Gene expression is displayed as fold changes of mRNA levels in relation to CTR + vehicle. N = 5/group. A two-way ANOVA with factors neurotoxin, drug, and their interaction was performed. A significant interaction was followed by a Bonferroni post hoc test: *p ≤ 0.05, **p ≤ 0.01. CTR: control; MPTP: 1-methyl-4-(2′-methylphenyl)-1,2,3,6-tetrahydropyridine hydrochloride