Cited by 129Nicotinic Acetylcholine Receptors StudyTreatment of Major DepressionNeurotransmitter Receptor Influence on Behavior

The nicotinic antagonist mecamylamine has antidepressant-like effects in wild-type but not β2- or α7-nicotinic acetylcholine receptor subunit knockout mice

Rabenstein, R. L., Caldarone, B. J., Picciotto, M. R.·2006·Psychopharmacology

Abstract

Rationale Increases in cholinergic transmission are linked to depression in human subjects and animal models. We therefore examined the effect of decreasing nicotinic acetylcholine receptor (nAChR) activity in tests of antidepressant efficacy using C57BL/6J mice.Objectives We determined whether the noncompetitive nAChR antagonist mecamylamine had antidepressant-like effects in the forced swim test (FST) and tail suspension test (TST). These experiments were repeated in mice lacking either the beta2- or alpha7-nAChR subunits to identify the nAChR subunits involved in mediating the antidepressant response to mecamylamine.Materials and methods Adult mice on the C57BL/6J background were acutely administered mecamylamine i.p. 30 min before testing in the FST or TST.Results A dose-response study showed that mecamylamine significantly decreased immobility time in the TST at the 1.0-mg/kg dose but did not alter baseline locomotor activity. The competitive nAChR antagonist dihydro-beta-erythroidine, but not the blood-brain barrier impermeant antagonist hexamethonium, also decreased immobility in the TST. One milligram per kilogram of mecamylamine also significantly decreased time immobile in the FST whereas both beta2- and alpha7-knockout mice were insensitive to the effects of mecamylamine in the FST.Conclusions Decreased activity of central nAChRs has antidepressant-like effects in both the TST and FST and these effects are dependent on both beta2 and alpha7 subunits. Therefore, compounds that decrease nAChR activity may be attractive new candidates for development as antidepressants in humans.

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Crossref · 10.1007/s00213-006-0568-z

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Authors
Rabenstein, R. L., Caldarone, B. J., & Picciotto, M. R.
Affiliations
Yale University (US)
Corresponding author
Picciotto, M. R.
Venue
Psychopharmacology
Published
2006-10-03
Volume
189
Issue
3
Pages
395-401
ISSN
  • 0033-3158 (ISSN-L)
  • 1432-2072
OpenAlex
W2043809720
Cited by
129
References
43
Citations by year
2026: 5 · 2025: 1 · 2024: 4 · 2023: 3 · 2022: 2 · 2021: 5 · 2020: 6 · 2019: 3 · 2018: 5 · 2017: 1 · 2016: 5 · 2015: 7 · 2014: 12 · 2013: 7 · 2012: 11
FWCI
3.94
Type
journal article
Language
en
Open access
closed
Locations
  • Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Alliance for Research on Schizophrenia and Depression
  • National Institutes of Health
  • National Institute on Alcohol Abuse and Alcoholism (P50AA015632, DA13334/AA15632)
  • National Institute of Mental Health (MH77681, R01MH077681)
  • National Institute on Drug Abuse (DA 00436, P50DA013334)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
mecamylamine, nicotinic acetylcholine receptors, antidepressant-like effects, knockout mice, forced swim test, tail suspension test, immobility time, dihydro-beta-erythroidine, hexamethonium, cholinergic neurotransmission, depression, nAChR antagonists
MeSH terms
Animals, Antidepressive Agents, Female, Male, Mecamylamine, Mice, Inbred C57BL, Motor Activity, Receptors, Nicotinic, Mice, Knockout, Nicotinic Antagonists, Hindlimb Suspension, Mice, alpha7 Nicotinic Acetylcholine Receptor

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