Comparative levels of CAT activity in different brain regions in samples from the CAT 15 min and CAT 15 min+MMP-9 groups expressed in IU/mg wet tissue. Abbreviations: OB = olfactory bulb, FC = frontal cortex, BS = brainstem, CB = cerebellum, MB = midbrain, HP = hippocampus and CT = cortex. All values are expressed as means ± SD with n = 3 rats per group (*significant difference between CAT-15 min and CAT+MMP-9–15 min groups; p ≤ 0.05).