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Methamphetamine (MA) as an addictive psychostimulant drug affects the central nervous system. The present research aimed at evaluating the impact of Berberine-hydrochloride on cognitive function Improvement and neuroprotective effects in MA Addicted Rats. Methods: In this study, 27 Male Wistar rats were randomly assigned to three groups, including Control, MA addiction and MA addiction with Berberine Hydrochloride (100 mg/kg/day) per oral during the three-week period of withdrawal. Two groups received inhaled MA self-administration for two weeks (up to 10 mg/kg). Following the experimental procedures, Morris Water Maze (MWM) and shuttle box were used to assess memory and hippocampal sections from the animals were examined for caspase-3, ki-67 and GFAP expression. Results: The obtained results from MWM showed that Berberine Hydrochloride decreases (p&lt;0.01) the distance moved and spent time to reach the hidden platform in four-day learning trails phase and there were significant differences in the distance moved, spent time and frequency of motion in target quadrant on probe test day between groups. Berberine Hydrochloride reduced also the latency to enter animals into the dark chamber in the treated group in comparison with the control group (p&lt;0.05). A significant decrease in activation of caspases-3, higher percentages of Ki67 expression and increase in GFAP expression of cells in Addicted group was found to compare with Berberine-treated and control groups (p&lt;0.05). Conclusions: Berberine Hydrochloride administration for 3 weeks improves cognition function in MA addiction and it has a potential for neuroprotective efficacy.

basic and clinical neuroscience/iranian journal of neuroscience

Neuroprotective Effects of Berberine Hydrochloride on Methamphetamine-induced Cognitive Dysfunction: Immunohistochemical and Behavioral Studies in Rats