Cited by 124Neurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology ResearchNicotinic Acetylcholine Receptors Study

M5 muscarinic receptors are needed for slow activation of dopamine neurons and for rewarding brain stimulation

Yeomans, John, Forster, Gina, Blaha, Charles·2001·Life Sciences

Abstract

Mesopontine cholinergic neurons (Ch5 and Ch6 cell groups) activate the cerebral cortex via thalamic projections, and activate locomotion and reward via dopamine neurons in the substantia nigra and ventral tegmental area (VTA). Nicotinic receptors in VTA activate dopamine neurons quickly, and are needed for the stimulant and rewarding effects of nicotine in rats. Muscarinic receptors in VTA activate dopamine neurons slowly, and are needed for the rewarding effects of hypothalamic stimulation, but do not increase locomotion. Antisense oligonucleotides targetting M5 mRNA, when infused into the VTA, inhibited M5 receptor binding and rewarding hypothalamic stimulation. Mutant mice with truncated M5 muscarinic receptor genes drank more water than wild-type controls. Spontaneous locomotion and locomotor responses to amphetamine and scopolamine were unchanged. Electrical stimulation near Ch6 induced dopamine release in the nucleus accumbens in two phases, an early phase (0-2 min after stimulation) dependent on nicotinic and gluatamatergic receptors in VTA, and a late phase (8-50 min after stimulation) dependent on muscarinic receptors in VTA. The late phase was lost in M5 mutant mice, while the early phase was unchanged. M5 muscarinic receptors bind slowly to muscarinic ligands, and appear to mediate slow secretions.

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Crossref · 10.1016/s0024-3205(01)01038-4

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  • Both muscarinic and nicotinic ACh receptors are present on VTA dopamine neurons, as well as on cholinergic and glutamatergic terminals regulating different aspects of dopamine release in output sites such as the striatum and NAc.

    “Both muscarinic and nicotinic ACh receptors are present on VTA dopamine neurons, as well as on cholinergic and glutamatergic terminals regulating different aspects of dopamine release in output sites, such as the striatum and NAc [160–162].”

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Authors
Yeomans, J., Forster, G., & Blaha, C.
Affiliations
  • University of Toronto (CA)
  • Macquarie University (AU)
Corresponding author
Yeomans, John
Venue
Life Sciences
Publisher
Elsevier BV
Published
2001-04
Volume
68
Issue
22-23
Pages
2449-2456
ISSN
0024-3205 (ISSN-L)
OpenAlex
W1999928356
Cited by
124
References
0
Citations by year
2025: 2 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 6 · 2018: 2 · 2017: 3 · 2016: 4 · 2015: 1 · 2014: 4 · 2013: 3 · 2012: 2
FWCI
3.07
Type
journal article
Language
en
Open access
closed
Locations
  • Life Sciences (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
Keywords
M5 muscarinic receptor, dopaminergic neurons, ventral tegmental area, nicotinic acetylcholine receptors, reward, brain stimulation, substantia nigra, nucleus accumbens dopamine release, antisense oligonucleotides, locomotion
MeSH terms
Acetylcholine, Animals, Corpus Striatum, Dopamine, Electric Stimulation, Humans, Hypothalamus, Neurons, Receptors, Muscarinic, Receptors, Nicotinic, Reward, Receptor, Muscarinic M5

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