Abstract | BACKGROUND AND PURPOSE: Tetrahydro-N, N-dimethyl-5, 5-diphenyl-3-furanmethanamine hydrochloride (ANAVEX1-41) is a potent muscarinic and sigma(1) (sigma (1)) receptor ligand. The sigma (1) receptor modulates glutamatergic and cholinergic responses in the forebrain and selective agonists are potent anti-amnesic and antidepressant DRUGS. WE HAVE HERE ANALYSED THE SIGMA (1) COMPONENT IN THE BEHAVIOURAL EFFECTS OF ANAVEX1-41. EXPERIMENTAL APPROACH: Binding of ANAVEX1-41 to muscarinic and sigma (1) receptors were measured using cell membranes. Behavioural effects of ANAVEX1-41 were tested in mice using memory (spontaneous alternation, passive avoidance, water-maze) and antidepressant-like activity (forced swimming) procedures. KEY RESULTS: In vitro, ANAVEX1-41 was a potent muscarinic (M(1)>M(3), M(4)>M(2) with K(i) ranging from 18 to 114 nM) and selective sigma (1) ligand (sigma (1), K(i)=44 nM; sigma (2), K(i)=4 microM). In mice, ANAVEX1-41 failed to affect learning when injected alone (0.03-1 mg kg(-1)), but attenuated scopolamine-induced amnesia with a bell-shaped dose response (maximum at 0.1 mg kg(-1)). The sigma (1) antagonist BD1047 blocked the anti-amnesic effect of ANAVEX1-41 on both short- and long-term memories. Pretreatment with a sigma (1) receptor-directed antisense oligodeoxynucleotide prevented effects of ANAVEX1-41 only in the passive avoidance procedure, measuring long-term memory. ANAVEX1-41 reduced behavioural despair at 30 and 60 mg kg(-1), without involving the sigma (1) receptor, as it was not blocked by BD1047 or the antisense oligodeoxynucleotide. CONCLUSIONS AND IMPLICATIONS:
ANAVEX1-41 is a potent anti-amnesic drug, acting through muscarinic and sigma (1) receptors. The latter component may be involved in the enhancing effects of the drug on long-term memory processes.
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Authors | J Espallergues, P Lapalud, A Christopoulos, V A Avlani, P M Sexton, A Vamvakides, T Maurice |
Journal | British journal of pharmacology
(Br J Pharmacol)
Vol. 152
Issue 2
Pg. 267-79
(Sep 2007)
ISSN: 0007-1188 [Print] England |
PMID | 17641675
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antidepressive Agents
- Furans
- Muscarinic Antagonists
- Oligodeoxyribonucleotides, Antisense
- Receptors, Muscarinic
- Receptors, sigma
- sigma-1 receptor
- tetrahydro-N, N-dimethyl-5,5-diphenyl-3-furanmethanamine hydrochloride
- Scopolamine
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Topics |
- Amnesia
(drug therapy, metabolism, physiopathology)
- Animals
- Antidepressive Agents
(pharmacology, therapeutic use)
- CHO Cells
- Cerebral Cortex
(metabolism)
- Cricetinae
- Cricetulus
- Furans
(pharmacology, therapeutic use)
- Humans
- Jurkat Cells
- Memory
(drug effects)
- Mice
- Motor Activity
(drug effects)
- Muscarinic Antagonists
(pharmacology)
- Oligodeoxyribonucleotides, Antisense
(pharmacology)
- Rats
- Receptors, Muscarinic
(metabolism)
- Receptors, sigma
(metabolism)
- Scopolamine
(pharmacology)
- Swimming
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