Endogenous level of oxidative stress biomarkers in brain tissue of scopolamine-induced amnesic models—C57BL/6N and C57BL/6J substrains: The lipid peroxidation (malondialdehyde, MDA) and antioxidant biomarkers (superoxide dismutase, SOD, catalase, CAT, glutathione peroxidase, GPx) levels in the (a) hippocampus and (b) cerebral cortex of mice were determined. Data are expressed as mean ± SD (n = 4; pooled biological replications). One-way ANOVA-Tukey’s multiple comparison test was performed where, * p < 0.05 scopolamine compared with the control group; $
p < 0.05 tacrine compared with scopolamine-treated group.