Abstract
Functional N- methyl- d- aspartate (NMDA) antagonists including competitive antagonists, glycine partial agonists, and use-dependent channel blockers exhibit antidepressant-like actions in preclinical models. The present study examined the effects of eliprodil (SL-82.0715), an NMDA antagonist acting at polyamine sites, in behavioral and neurochemical tests predictive of antidepressant activity. In mice, eliprodil produced a dose-dependent reduction in immobility in the forced swim test, but was inactive in the tail suspension test. Chronic treatment with eliprodil produced both a significant downregulation of β-adrenoceptors and a reduction in the potency of glycine to inhibit [ 3H]5,7-dichlorokynurenic acid binding to strychnine-insensitive glycine receptors in neocortical membranes. In toto, these data indicate that like other NMDA antagonists, eliprodil possesses antidepressant-like actions in preclinical tests predictive of clinical efficacy.
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