Cited by 423Neurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology ResearchSingle-cell and spatial transcriptomics

Mapping projections of molecularly defined dopamine neuron subtypes using intersectional genetic approaches

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Poulin, Jean-Francois, Caronia, Giuliana, Hofer, Caitlyn, Cui, Qiaoling, Helm, Brandon, Ramakrishnan, Charu, Chan, C. Savio, Dombeck, Daniel A. +2 more·2018·Nature Neuroscience

Abstract

Midbrain dopamine (DA) neurons have diverse functions that can in part be explained by their heterogeneity. Although molecularly distinct subtypes of DA neurons have been identified by single-cell gene expression profiling, fundamental features such as their projection patterns have not been elucidated. Progress in this regard has been hindered by the lack of genetic tools for studying DA neuron subtypes. Here we develop intersectional genetic labeling strategies, based on combinatorial gene expression, to map the projections of molecularly defined DA neuron subtypes. We reveal distinct genetically defined dopaminergic pathways arising from the substantia nigra pars compacta and from the ventral tegmental area that innervate specific regions of the caudate putamen, nucleus accumbens and amygdala. Together, the genetic toolbox and DA neuron subtype projections presented here constitute a resource that will accelerate the investigation of this clinically significant neurotransmitter system.

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  • ALDH1A1+ dopamine neurons of the substantia nigra pars compacta project prominently to the dorsal caudate putamen, with fibers being denser in rostral sections and less dense caudally.

    “Prominent projections of ALDH1A1+ DA neurons of the SNc have been observed in the dorsal caudate putamen (CP; [20–22]), with fibers being more dense in rostral sections and less so in caudal regions.”
  • In the dorsal caudate putamen, ALDH1A1+ dopamine neurons preferentially innervate some mu-opioid receptor-positive patches, known as striosomes, although this preference is not exclusive.

    “In the dorsal CP, these neurons preferentially innervate some μ-opioid receptor+ (MOR) patches (commonly known as striosomes), although this is not exclusive [20–22].”
  • Otx2+, Aldh1a1+ dopamine neurons direct major projections to the medial shell of the nucleus accumbens and minor projections to the lateral septum.

    “This population has been accessed using Aldh1a1 and NeuroD6 based drivers, and it appears to direct major projections to the medial shell of the ACB, and minor projections to the lateral septum [17,20,22,36].”
  • Intersectional genetic methods have been created to target DA neuron subtypes specified by combinations of genes.

    “Towards this end, selective intersectional genetic approaches have been developed to target DA neuron subtypes that are defined by a combination of genes [20] (Box 3)”
  • Projections of Vip+ dopamine neurons are focal, mapped to the bed nucleus of the stria terminalis and central nucleus of the amygdala, and innervate a smaller target volume than other dopamine neurons.

    “The projections of these neurons are peculiar in that they are particularly focal – they have been mapped to the bed nucleus of the stria terminals (BST) and central nucleus of the amygdala [13,20], and appear to innervate a much smaller target volume than other DA neurons (e.g. [49] and [50]).”

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Authors
Poulin, J.-F., Caronia, G., Hofer, C., Cui, Q., Helm, B., Ramakrishnan, C., Chan, C. S., Dombeck, D. A., Deisseroth, K., & Awatramani, R.
Affiliations
  • Northwestern University (US)
  • Stanford University (US)
Corresponding author
Awatramani, Rajeshwar
Venue
Nature Neuroscience
Published
2018-08-13
Volume
21
Issue
9
Pages
1260-1271
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W2887114149
Cited by
423
References
64
Citations by year
2026: 50 · 2025: 63 · 2024: 52 · 2023: 63 · 2022: 49 · 2021: 54 · 2020: 48 · 2019: 38 · 2018: 5
FWCI
16.62
Type
journal article
Language
en
Open access
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Nature
  • National Institutes of Health
  • National Institute of Mental Health (R01MH110556)
  • National Institute on Drug Abuse (P50DA042012)
  • National Institute of Neurological Disorders and Stroke (R01NS069777, P50NS047085, R01NS096240, R21NS072703)
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 › Single-cell and spatial transcriptomics
Keywords
combinatorial gene expression, substantia nigra pars compacta, ventral tegmental area, caudate-putamen, nucleus accumbens, amygdala, dopaminergic pathways
MeSH terms
Animals, Brain Mapping, Caudate Nucleus, Cell Line, Mice, Inbred C57BL, Neural Pathways, Nucleus Accumbens, Olfactory Bulb, Substantia Nigra, Gene Expression Profiling, Mice, Dopaminergic Neurons

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