Cited by 46Neuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on BehaviorCellular transport and secretion

Divergent properties and independent regulation of striatal dopamine and GABA co-transmission

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Zych, Sarah M., Ford, Christopher P.·2022·Cell Reports

Abstract

Substantia nigra pars compacta (SNc) dopamine neurons play a key role in regulating the activity of striatal circuits within the basal ganglia. In addition to dopamine, these neurons release several other transmitters, including the major inhibitory neurotransmitter γ-aminobutyric acid (GABA). Both dopamine and GABA are loaded into SNc synaptic vesicles by the vesicular monoamine transporter 2 (VMAT2), and co-release of GABA provides strong inhibition to the striatum by directly inhibiting striatal medium spiny projection neurons (MSNs) through activation of GABA A receptors. Here, we found that despite both dopamine and GABA being co-packaged by VMAT2, the properties of transmission, including Ca 2+ sensitivity, release probability, and requirement of active zone scaffolding proteins, differ between the two transmitters. Moreover, the extent by which presynaptic neuromodulators inhibit co-transmission also varied. Differences in modulation and the mechanisms controlling release allow for independent regulation of dopamine and GABA signals despite both being loaded via similar mechanisms.

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Crossref · 10.1016/j.celrep.2022.110823

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  • DA and GABA may be segregated into not fully overlapping and potentially separate vesicle populations, despite both depending on vMAT2 for vesicular loading.

    “These findings suggest that DA and GABA may be segregated into not fully overlapping and potentially separate vesicle populations, despite both depending on vMAT2 for vesicular loading.119”

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1 of the 76 references couldn’t be matched to a known paper.

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  1. Ducrot C, Carvalho GD, Delignat-Lavaud B, Delmas CVL, Giguère N, Mukherjee S, Burke-Nanni S, Bourque M-J, Parent M, Chen LY, (2021). Neurexins regulate GABA co-release by dopamine neurons. Preprint at bioRxiv. 10.1101/2021.10.17.464666. · DOI

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Authors
Zych, S. M., & Ford, C. P.
Affiliations
University of Colorado Anschutz (US)
Corresponding author
Ford, Christopher P.
Venue
Cell Reports
Publisher
Elsevier BV
Published
2022-05
Volume
39
Issue
7
Pages
110823
ISSN
2211-1247 (ISSN-L)
OpenAlex
W4280494930
Cited by
46
References
76
Citations by year
2026: 6 · 2025: 9 · 2024: 23 · 2023: 7 · 2022: 1
FWCI
4.41
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Institutes of Health (F30 DA048543, R01-DA35821, R21-MH123085, R01-NS95809)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords
dopamine, substantia nigra pars compacta, vesicular monoamine transporter 2, striatum, medium spiny neurons, GABAA receptor, calcium sensitivity, release probability, basal ganglia
MeSH terms
Basal Ganglia, Corpus Striatum, Dopamine, gamma-Aminobutyric Acid, Substantia Nigra, Dopaminergic Neurons

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