Different capability of N-methyl-D-aspartate antagonists to affect locomotor/exploratory activity of mice in a computerized on-line open field test.
The effects of the competitive N-methyl-D-aspartate (NMDA) antagonists CGS 19755 and CPP, and of the noncompetitive NMDA antagonists PCP, MK 801, and dextromethorphan (DM) have been studied on the locomotor/exploratory activity of mice in a computerized on-line open field test. CGS 19755 (12.5-25 mg/kg, IP) induced a dose-dependent decrease in the locomotor/exploratory activity of mice; CPP (25-50 mg/kg, IP) did not present such an effect. PCP (1.25-10 mg/kg, IP) induced a dose-dependent increase/decrease in the locomotor/exploratory activity of mice, and DM (25-50 mg/kg, IP) and MK 801 (0.125-0.250 mg/kg, IP) increased it. The data show that NMDA antagonists affect locomotor/exploratory activity of mice in different ways, inducing both potentiating and inhibitory effects.
Pharmacology Department, Istituto Superiore di Sanitá, Roma, Italy.
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Diana
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Sagratella
D000818:Animals; D004305:Dose-Response Relationship, Drug; D005106:Exploratory Behavior / Q000187:drug effects*; D008297:Male; D051379:Mice; D009043:Motor Activity / Q000187:drug effects*; D016202:N-Methylaspartate / Q000037:antagonists & inhibitors*; D009435:Synaptic Transmission / Q000187:drug effects
D016202:N-Methylaspartate