Effect of QO58-lysine on locomotor activity in mice. Mice were intraperitoneally administered different doses of QO58-lysine (5, 10, and 20 mg/kg, ip), retigabine (5 mg/kg, ip) or vehicle (10% Tween-80 in 0.9% NaCl) (top panel). Locomotion was observed for 60 min. Column graphs depicting the cumulative distance of locomotion within the 60 min period (bottom panel), and the data were analyzed by one-way ANOVA. The data are expressed as the mean±SEM (n=10).