Cited by 91Nicotinic Acetylcholine Receptors StudyNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Multiple Nicotinic Acetylcholine Receptor Subtypes in the Mouse Amygdala Regulate Affective Behaviors and Response to Social Stress

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Mineur, Yann S, Fote, Gianna M, Blakeman, Sam, Cahuzac, Emma L M, Newbold, Sylvia A, Picciotto, Marina R·2016·Neuropsychopharmacology

Abstract

Electrophysiological and neurochemical studies implicate cholinergic signaling in the basolateral amygdala (BLA) in behaviors related to stress. Both animal studies and human clinical trials suggest that drugs that alter nicotinic acetylcholine receptor (nAChR) activity can affect behaviors related to mood and anxiety. Clinical studies also suggest that abnormalities in cholinergic signaling are associated with major depressive disorder, whereas pre-clinical studies have implicated both β2 subunit-containing (β2*) and α7 nAChRs in the effects of nicotine in models of anxiety- and depression-like behaviors. We therefore investigated whether nAChR signaling in the amygdala contributes to stress-mediated behaviors in mice. Local infusion of the non-competitive non-selective nAChR antagonist mecamylamine or viral-mediated downregulation of the β2 or α7 nAChR subunit in the amygdala all induced robust anxiolytic- and antidepressant-like effects in several mouse behavioral models. Further, whereas α7 nAChR subunit knockdown was somewhat more effective at decreasing anxiety-like behavior, only β2 subunit knockdown decreased resilience to social defeat stress and c-fos immunoreactivity in the BLA. In contrast, α7, but not β2, subunit knockdown effectively reversed the effect of increased ACh signaling in a mouse model of depression. These results suggest that signaling through β2* nAChRs is essential for baseline excitability of the BLA, and a decrease in signaling through β2 nAChRs alters anxiety- and depression-like behaviors even in unstressed animals. In contrast, stimulation of α7 nAChRs by acetylcholine may mediate the increased depression-like behaviors observed during the hypercholinergic state observed in depressed individuals.

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Crossref · 10.1038/npp.2015.316

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Authors
Mineur, Y. S., Fote, G. M., Blakeman, S., Cahuzac, E. L. M., Newbold, S. A., & Picciotto, M. R.
Affiliations
Yale University (US)
Corresponding author
Picciotto, Marina R
Venue
Neuropsychopharmacology
Published
2015-10-16
Volume
41
Issue
6
Pages
1579-1587
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W2334642065
Cited by
90
References
51
Citations by year
2026: 5 · 2025: 11 · 2024: 5 · 2023: 11 · 2022: 9 · 2021: 11 · 2020: 9 · 2019: 6 · 2018: 10 · 2017: 8 · 2016: 5
FWCI
3.33
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (DA033945)
  • National Institute of Mental Health (MH077681, MH105824, R03MH105824, R01MH077681)
  • National Institute on Drug Abuse (R01DA037566, P50DA033945, DA033945)
  • Office of Research on Women's Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
nicotinic acetylcholine receptors, basolateral amygdala, beta2 nAChR, alpha7 nAChR, social defeat stress, anxiety-like behavior, depression-like behavior, mecamylamine, cholinergic neurotransmission, c-fos, major depressive disorder, stress resilience
MeSH terms
Amygdala, Animals, Male, Mecamylamine, Mice, Inbred C57BL, Physostigmine, Receptors, Nicotinic, Stress, Psychological, Signal Transduction, Mice, Knockout, Nicotinic Antagonists, Mice, alpha7 Nicotinic Acetylcholine Receptor

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