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Viral-genetic tracing of the input-output organization of a central noradrenaline circuit

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Schwarz, Lindsay A., Miyamichi, Kazunari, Gao, Xiaojing J., Beier, Kevin T., Weissbourd, Brandon, DeLoach, Katherine E., Ren, Jing, Ibanes, Sandy +3 more·2015·Nature

Abstract

Deciphering how neural circuits are anatomically organized with regard to input and output is instrumental in understanding how the brain processes information. For example, locus coeruleus noradrenaline (also known as norepinephrine) (LC-NE) neurons receive input from and send output to broad regions of the brain and spinal cord, and regulate diverse functions including arousal, attention, mood and sensory gating. However, it is unclear how LC-NE neurons divide up their brain-wide projection patterns and whether different LC-NE neurons receive differential input. Here we developed a set of viral-genetic tools to quantitatively analyse the input-output relationship of neural circuits, and applied these tools to dissect the LC-NE circuit in mice. Rabies-virus-based input mapping indicated that LC-NE neurons receive convergent synaptic input from many regions previously identified as sending axons to the locus coeruleus, as well as from newly identified presynaptic partners, including cerebellar Purkinje cells. The 'tracing the relationship between input and output' method (or TRIO method) enables trans-synaptic input tracing from specific subsets of neurons based on their projection and cell type. We found that LC-NE neurons projecting to diverse output regions receive mostly similar input. Projection-based viral labelling revealed that LC-NE neurons projecting to one output region also project to all brain regions we examined. Thus, the LC-NE circuit overall integrates information from, and broadcasts to, many brain regions, consistent with its primary role in regulating brain states. At the same time, we uncovered several levels of specificity in certain LC-NE sub-circuits. These tools for mapping output architecture and input-output relationship are applicable to other neuronal circuits and organisms. More broadly, our viral-genetic approaches provide an efficient intersectional means to target neuronal populations based on cell type and projection pattern.

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  • The input-output architecture of the DR serotonin system differs from the locus coeruleus norepinephrine system with more homogeneous input and output, and resembles midbrain dopamine systems with biased input and segregated output.

    “Thus, the input-output architecture of the DR serotonin system differs from that of the locus coeruleus norepinephrine system with more homogeneous input and output (Schwarz et al., 2015), and resembles more closely those of the midbrain dopamine systems (Beier et al., 2015; Lerner et al., 2015), with biased input and segregated output.”

    From Anatomically defined and functionally distinct dorsal raphe serotonin sub-systems (2018) · cites this paper as Schwarz et al., 2015

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Authors
Schwarz, L. A., Miyamichi, K., Gao, X. J., Beier, K. T., Weissbourd, B., DeLoach, K. E., Ren, J., Ibanes, S., Malenka, R. C., Kremer, E. J., & Luo, L.
Affiliations
  • Howard Hughes Medical Institute (US)
  • Centre National de la Recherche Scientifique (FR)
  • Stanford Medicine (US)
Corresponding author
Luo, Liqun
Venue
Nature
Published
2015-07-01
Volume
524
Issue
7563
Pages
88-92
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2099401565
Cited by
744
References
40
Citations by year
2026: 48 · 2025: 74 · 2024: 64 · 2023: 85 · 2022: 67 · 2021: 77 · 2020: 85 · 2019: 78 · 2018: 55 · 2017: 55 · 2016: 38 · 2015: 16
FWCI
25.50
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • National Science Foundation
  • Howard Hughes Medical Institute
  • Agence Nationale de la Recherche (ANR-10-LABX-0012)
  • Stanford Bio-X
  • National Institute of Mental Health
  • National Institute on Drug Abuse (F32DA038913, P01DA008227)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
Keywords
locus coeruleus, noradrenergic neurons, norepinephrine, rabies virus tracing, transsynaptic tracing, Purkinje cells, neuronal projection patterns, mice, brain states, spinal cord projections, sensory gating
MeSH terms
Animals, Axons, Brain, Female, Locus Coeruleus, Male, Neural Pathways, Neurons, Norepinephrine, Pilot Projects, Purkinje Cells, Rabies virus, Synapses, Reproducibility of Results, Rats, Wistar, Mice, Rats, Neuroanatomical Tract-Tracing Techniques

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