Complex representation of taste quality by second-order gustatory neurons in Drosophila
Open accessAbstract
Sweet and bitter compounds excite different sensory cells and drive opposing behaviors. However, it remains unclear how sweet and bitter tastes are represented by the neural circuits linking sensation to behavior. To investigate this question in Drosophila, we devised trans-Tango(activity), a strategy for calcium imaging of second-order gustatory projection neurons based on trans-Tango, a genetic transsynaptic tracing technique. We found spatial overlap between the projection neuron populations activated by sweet and bitter tastants. The spatial representation of bitter tastants in the projection neurons was consistent, while that of sweet tastants was heterogeneous. Furthermore, we discovered that bitter tastants evoke responses in the gustatory receptor neurons and projection neurons upon both stimulus onset and offset and that bitter offset and sweet onset excite overlapping second-order projections. These findings demonstrate an unexpected complexity in the representation of sweet and bitter tastants by second-order neurons of the gustatory circuit.
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The neurons reached early from gustatory neurons match second-order projection neurons identified by Snell et al. using trans-Tango.
“For instance, the neurons reached early from gustatory neurons (Fig. 6b) match second-order projection neurons identified by Snell et al.86 using trans-Tango.”
From Neuronal wiring diagram of an adult brain (2024) · cites this paper as [86]
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Self-citation
- Authors
- Snell, N. J., Fisher, J. D., Hartmann, G. G., Zolyomi, B., Talay, M., & Barnea, G.
- Affiliations
- Brown University (US)
- Corresponding author
- Barnea, Gilad
- Venue
- Current Biology
- Publisher
- Elsevier BV
- Published
- 2022-09
- Volume
- 32
- Issue
- 17
- Pages
- 3758-3772.e4
- ISSN
- 0960-9822 (ISSN-L)
- PMC
- PMC9474709
- OpenAlex
- W4291582620
- Cited by
- 39
- References
- 56
- Citations by year
- 2026: 6 · 2025: 7 · 2024: 15 · 2023: 5 · 2022: 3 · 2021: 3
- FWCI
- 3.33
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- www.elsevier.com/legal/tdmrep-license (tdm)
- www.elsevier.com/open-access/userlicense/1.0/ (vor, 376 d)
- doi.org/10.15223/policy-017 (stm-asf)
- doi.org/10.15223/policy-037 (stm-asf)
- doi.org/10.15223/policy-012 (stm-asf)
- doi.org/10.15223/policy-029 (stm-asf)
- doi.org/10.15223/policy-004 (stm-asf)
- Locations
- Current Biology (publishedVersion)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Science Foundation (1058262)
- Brown University
- National Institutes of Health
- National Institute of Mental Health (R01MH105368, T32MH020068)
- National Institute on Deafness and Other Communication Disorders (R01DC017146)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
- Health Sciences › Nursing › Nutrition and Dietetics › Biochemical Analysis and Sensing Techniques
- Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
- Keywords
- sweet taste, bitter taste, gustatory receptor neurons, transsynaptic tracing, calcium imaging, Drosophila
- MeSH terms
- Animals, Drosophila, Neurons, Taste, Drosophila Proteins, Taste Perception
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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