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N-methyl-D-aspartate Receptors are Involved in the Effect of Lithium on Passive Avoidance Memory in Mice

Published online by Cambridge University Press:  16 April 2020

M.-R. Zarrindast
Affiliation:
Department of Pharmacology and Iranian National Center for Addiction Studies, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran School of Cognitive Science, Institute for studies Theoretical Physics and Mathematics, Tehran, Iran Institute for Cognitive Sciences, Tehran, Tehran, Iran
H. Niasari
Affiliation:
Department of Pharmacology and Iranian National Center for Addiction Studies, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
S. Ahmadi
Affiliation:
Department of Biology, Faculty of Science, University of Kurdistan, Sanandai, Tehran, Iran
B. Shafaghi
Affiliation:
Department of Pharmacology, Faculty of Pharmacy, Shahid Beheshti University, Tehran, Iran

Abstract

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In the present study, the effects of intracerebroventricular (i.c.v.) injections of N-methyl-D-aspartate (NMDA) receptor agonist and antagonist on the lithium state-dependent memory have been investigated. For memory assessment, one-trial step-down passive avoidance task was used in adult male NMRI mice. Post-training intraperitoneal (i.p.) administration of lithium (10 mg/kg) impaired the memory of passive avoidance task. Pre-test administration of the same dose of the drug (10 mg/kg) restored impairment of memory by lithium given after training. This is known as state-dependent memory. In addition, pre-test administration of both NMDA receptor agonist (NMDA; 0.01 and 0.1 ng/mouse, i.c.v.) and the non-competitive NMDA receptor antagonist, MK-801 (0.1 and 0.5 mg/mouse, i.c.v) also restored impairment of memory induced by post-training lithium. On the other hand, pre-test co-administration of ineffective dose of NMDA (0.001 ng/mouse, i.c.v.) or MK-801 (0.001 mg/mouse, i.c.v) with lower doses of lithium (1.25, 2.5 and 5 mg/kg, i.p.) increased the restoration of memory by lithium. The results suggest that NMDA receptors are involved, at least partly, in the lithium state-dependent memory of passive avoidance task.

Type
P02-160
Copyright
Copyright © European Psychiatric Association 2009
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