Concentrations of neurotransmitters in the brain tissues of different groups of mice.

WT-CON: wild-type control, WT-OVX: wild-type ovariectomy, KO-CON: Nrf2−/− control, KO-OVX: Nrf2−/− ovariectomy. (a) Concentrations of 5-hydroxytryptamine (5-HT) in the brain tissues of different groups of mice at postoperative week 9. (b) Dopamine (DA) concentrations in the brain tissues of different groups of mice at postoperative week 9. Results are shown as mean ± SEM. *P < 0.05 analyzed by One-way ANOVA with Bonferroni's Multiple comparison test.