Abstract:
:Memantine (1-amino-3,5-dimethyl-adamantane) is the only clinically used NMDA (N-methyl-D-aspartate) glutamate receptor antagonist. The present experiments were carried out to compare the dose-response for memantine's predictive therapeutic and side-effects in a variety of tests in C57BL/6J/Han mice, and to elucidate if tolerance may develop to them. Memantine produced a dose-dependent (2.5-15 mg/kg) antidepressant-like effect in the tail-suspension test (TST); this anti-immobility effect of 15 mg/kg of memantine appeared to persist with its sub-chronic administration (3 days, twice daily). Treatment with the same doses of memantine produced no effects on locomotor activity, and sub-chronic treatment with 15 mg/kg did not affect locomotor activity. Exploratory activity was assessed in the open field. Given acutely 5 min before the test, memantine reduced rearing (1.875-30 mg/kg), ambulation (7.5 and 30 mg/kg) and grooming (30 mg/kg). These effects were more pronounced 35 min after its administration. As measured in three different tests, ataxia and stereotypy appeared only at the single dose of 30 mg/kg, 5 and 35 min after administration. In mice treated sub-chronically with 30 mg/kg, the dose of 30 mg/kg increased ambulation, and continued to decrease rearing and grooming, but no signs of ataxia and stereotypy were detected. The present data indicate that different doses of memantine are required for the purportedly therapeutic and side-effects, and that tolerance may develop to the ataxic, but not anti-immobility actions.
journal_name
Behav Pharmacoljournal_title
Behavioural pharmacologyauthors
Kos T,Popik Pdoi
10.1097/00008877-200505000-00004subject
Has Abstractpub_date
2005-05-01 00:00:00pages
155-61issue
3eissn
0955-8810issn
1473-5849pii
00008877-200505000-00004journal_volume
16pub_type
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