Cited by 197Neurobiology and Insect Physiology ResearchNeuroscience and Neuropharmacology ResearchMemory and Neural Mechanisms

Memory-Relevant Mushroom Body Output Synapses Are Cholinergic

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Barnstedt, Oliver, Owald, David, Felsenberg, Johannes, Brain, Ruth, Moszynski, John-Paul, Talbot, Clifford B., Perrat, Paola N., Waddell, Scott·2016·Neuron

Abstract

Memories are stored in the fan-out fan-in neural architectures of the mammalian cerebellum and hippocampus and the insect mushroom bodies. However, whereas key plasticity occurs at glutamatergic synapses in mammals, the neurochemistry of the memory-storing mushroom body Kenyon cell output synapses is unknown. Here we demonstrate a role for acetylcholine (ACh) in Drosophila. Kenyon cells express the ACh-processing proteins ChAT and VAChT, and reducing their expression impairs learned olfactory-driven behavior. Local ACh application, or direct Kenyon cell activation, evokes activity in mushroom body output neurons (MBONs). MBON activation depends on VAChT expression in Kenyon cells and is blocked by ACh receptor antagonism. Furthermore, reducing nicotinic ACh receptor subunit expression in MBONs compromises odor-evoked activation and redirects odor-driven behavior. Lastly, peptidergic corelease enhances ACh-evoked responses in MBONs, suggesting an interaction between the fast- and slow-acting transmitters. Therefore, olfactory memories in Drosophila are likely stored as plasticity of cholinergic synapses.

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Crossref · 10.1016/j.neuron.2016.02.015

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  • Co-transmission of a fast-acting transmitter and a neuropeptide was more common.

    “Co-transmission of a fast-acting transmitter and a neuropeptide was more common, e.g., Kenyon cells (at least acetylcholine, sparkly and short neuropeptide F),21,25,55,164 the dorsal paired medial (DPM) neuron (GABA, serotonin, sparkly, nplp1, proctolin, orcokinin, eclosion hormone, CG34136)25,56,60 and most central complex, mushroom body output and mushroom body dopaminergic neurons.25,157”

    From Neurotransmitter classification from electron microscopy images at synaptic sites in Drosophila melanogaster (2024) · cites this paper as [55]

    The Discussion (page not available) says that αβ and γ Kenyon cells can corelease acetylcholine with the sNPF neuropeptide, supporting the Kenyon-cell example of fast-transmitter and neuropeptide co-transmission. The cited paper does not establish that such co-transmission was “more common,” nor does the relevant passage identify sparkly as a Kenyon-cell transmitter. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Immunohistochemistry and RNA sequencing data have shown that Kenyon cells express the machinery necessary for cholinergic transmission.

    “Immunohistochemistry and RNA sequencing data have shown that Kenyon cells express the machinery necessary for cholinergic transmission.21,55,164”

    From Neurotransmitter classification from electron microscopy images at synaptic sites in Drosophila melanogaster (2024) · cites this paper as [55]

    The Results section (“Drosophila Kenyon Cell Function Requires ChAT Expression”; page unavailable) reports immunohistochemical evidence that Kenyon cells express ChAT and VAChT, proteins needed for cholinergic transmission. It also cites microarray-based gene-expression data, not RNA sequencing data, so this source does not support the claim’s RNA-sequencing method. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

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Authors
Barnstedt, O., Owald, D., Felsenberg, J., Brain, R., Moszynski, J.-P., Talbot, C. B., Perrat, P. N., & Waddell, S.
Affiliations
  • University of Oxford (GB)
  • University of Massachusetts Chan Medical School (US)
Corresponding author
  • Owald, David
  • Waddell, Scott
Venue
Neuron
Publisher
Elsevier BV
Published
2016-03
Volume
89
Issue
6
Pages
1237-1247
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2290925166
Cited by
197
References
91
Citations by year
2026: 9 · 2025: 15 · 2024: 20 · 2023: 28 · 2022: 17 · 2021: 21 · 2020: 22 · 2019: 17 · 2018: 19 · 2017: 21 · 2016: 8
FWCI
12.19
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • The Journal of the American Medical Association (JAMA) Network (American Medical Association) (submittedVersion, cc-by)
Funders
Wellcome Trust (090309/Z/09/Z, 090924)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
mushroom body, Kenyon cells, mushroom body output neurons, acetylcholine, cholinergic synapses, nicotinic acetylcholine receptors, vesicular acetylcholine transporter, choline acetyltransferase, olfactory memory, synaptic plasticity, Drosophila
MeSH terms
Animals, Animals, Newborn, Calcium, Choline O-Acetyltransferase, Conditioning, Classical, Drosophila, Gene Expression Regulation, Glutamate Decarboxylase, Memory, Neurons, Synapses, Transcription Factors, Cholinergic Agents, Mushroom Bodies, Drosophila Proteins, Animals, Genetically Modified, RNA Interference, Vesicular Acetylcholine Transport Proteins, Vesicular Inhibitory Amino Acid Transport Proteins, Vesicular Glutamate Transport Proteins

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