Enzymatic–nonenzymatic cellular antioxidant defense systems response and immunohistochemical detection of MDMA, VMAT2, HSP70, and apoptosis as biomarkers for MDMA (Ecstasy) neurotoxicity
Journal of Neuroscience Research October 1, 2009 Irene Riezzo, Daniela Cerretani, Carmela Fiore et al. 47 citations
A single dose of MDMA (20 mg/kg) in rats rapidly disrupts the brain's antioxidant defenses within hours. Reduced and oxidized glutathione ratios decreased, and antioxidant enzyme activities fell significantly after 3 and 6 hours in the frontal cortex. Ascorbic acid levels rose sharply in the striatum, hippocampus, and frontal cortex after 3 and 6 hours. Malonaldehyde, a marker of oxidative damage, increased in the striatum after 3 and 6 hours and in the hippocampus and frontal cortex after 6 hours. Immunohistochemistry revealed strong antivesicular monoamine transporter 2 positivity in frontal sections, basal ganglia, and thalamus, and heat shock protein 70 appeared in the superficial cortical layer after 24 hours, indicating early neurotoxic changes.