Cited by 40Nicotinic Acetylcholine Receptors StudyNeuroscience and Neuropharmacology ResearchReceptor Mechanisms and Signaling

Release‐enhancing pre‐synaptic muscarinic and nicotinic receptors co‐exist and interact on dopaminergic nerve endings of rat nucleus accumbens

Grilli, Massimo, Patti, Laura, Robino, Federica, Zappettini, Stefania, Raiteri, Maurizio, Marchi, Mario·2008·Journal of Neurochemistry

Abstract

Dopaminergic nerve endings in the corpus striatum possess nicotinic (nAChRs) and muscarinic cholinergic receptors (mAChRs) mediating release of dopamine (DA). Whether nAChRs and mAChRs co‐exist and interact on the same nerve endings is unknown. We here investigate on these possibilities using rat nucleus accumbens synaptosomes pre‐labeled with [3 H]DA and exposed in superfusion to cholinergic receptor ligands. The mixed nAChR–mAChR agonists acetylcholine (ACh) and carbachol provoked [3 H]DA release partially sensitive to the mAChR antagonist atropine but totally blocked by the nAChR antagonist mecamylamine. Addition of the mAChR agonist oxotremorine at the minimally effective concentration of 30 μmol/L, together with 3, 10, or 100 μmol/L (−)nicotine provoked synergistic effect on [3 H]DA overflow. The [3 H]DA overflow elicited by 100 μmol/L (−)nicotine plus 30 μmol/L oxotremorine was reduced by atropine down to the release produced by (−)nicotine alone and it was abolished by mecamylamine. The ryanodine receptor blockers dantrolene or 8‐bromo‐cADP‐ribose, but not the inositol 1,4,5‐trisphosphate receptor blocker xestospongin C inhibited the (−)nicotine/oxotremorine evoked [3 H]DA overflow similarly to atropine. This overflow was partly sensitive to 100 nmol/L methyllycaconitine which did not prevent the synergistic effect of (−)nicotine/oxotremorine. Similarly to (−)nicotine, the selective α4β2 nAChR agonist RJR2403 exhibited synergism when added together with oxotremorine. To conclude, in rat nucleus accumbens, α4β2 nAChRs exert a permissive role on the releasing function of reportedly M 5 mAChRs co‐existing on the same dopaminergic nerve endings.

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Crossref · 10.1111/j.1471-4159.2008.05307.x

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  • CHRM4 has been associated with schizophrenia and implicated in cognitive flexibility and dopamine release.

    “the muscarinic acetylcholine M4 receptor (CHRM4) has been associated with schizophrenia22 and implicated in cognitive flexibility23 and dopamine release24.”

    From Oxytocin pathway gene networks in the human brain (2019) · cites this paper as [24]

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Authors
Grilli, M., Patti, L., Robino, F., Zappettini, S., Raiteri, M., & Marchi, M.
Affiliations
University of Genoa (IT)
Corresponding author
Marchi, Mario
Venue
Journal of Neurochemistry
Publisher
Wiley
Published
2008-02-20
Volume
105
Issue
6
Pages
2205-2213
ISSN
  • 0022-3042 (ISSN-L)
  • 1471-4159
OpenAlex
W1557961794
Cited by
40
References
45
Citations by year
2024: 1 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 1 · 2019: 2 · 2018: 2 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 6 · 2013: 2 · 2012: 4
FWCI
1.92
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neurochemistry (publishedVersion)
  • PubMed (publishedVersion)
  • CINECA IRIS Institutial Research Information System (University of Genoa) (submittedVersion)
Funders
Ministero dell’Istruzione, dell’Università e della Ricerca
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 › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
Keywords
nicotinic acetylcholine receptors, muscarinic receptors, dopamine release, dopaminergic terminals, nucleus accumbens, M5 muscarinic receptor, alpha4beta2 nAChR, receptor interaction, ryanodine receptor, calcium release, acetylcholine, carbachol, oxotremorine, mecamylamine, atropine, methyllycaconitine, striatum
MeSH terms
Animals, Dopamine, Evoked Potentials, Male, Nerve Endings, Nucleus Accumbens, Protein Binding, Receptors, Cholinergic, Receptors, Muscarinic, Receptors, Nicotinic, Rats, Sprague-Dawley, Rats

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