Cited by 84Neuroscience and Neuropharmacology ResearchNeurobiology and Insect Physiology ResearchGenetics and Neurodevelopmental Disorders

Neurexin controls plasticity of a mature, sexually dimorphic neuron

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Hart, Michael P., Hobert, Oliver·2018·Nature

Abstract

During development and adulthood, brain plasticity is evident at several levels, from synaptic structure and function to the outgrowth of dendrites and axons. Whether and how sex impinges on neuronal plasticity is poorly understood. Here we show that the sex-shared GABA (γ-aminobutyric acid)-releasing DVB neuron in Caenorhabditis elegans displays experience-dependent and sexually dimorphic morphological plasticity, characterized by the stochastic and dynamic addition of multiple neurites in adult males. These added neurites enable synaptic rewiring of the DVB neuron and instruct a functional switch of the neuron that directly modifies a step of male mating behaviour. Both DVB neuron function and male mating behaviour can be altered by experience and by manipulation of postsynaptic activity. The outgrowth of DVB neurites is promoted by presynaptic neurexin and antagonized by postsynaptic neuroligin, revealing a non-conventional activity and mode of interaction of these conserved, human-disease-relevant factors.

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  • Connectivity reinforcement by circuit activity and experience has been demonstrated but remains little studied.

    “Reinforcement of connectivity by circuit activity and hence experience has been demonstrated but little studied so far45.”

    From Whole-animal connectomes of both Caenorhabditis elegans sexes (2019) · cites this paper as [45]

    In “DVB neurites are experience and activity-dependent” (page unavailable), the paper reports that mating experience and repeated circuit activation increase DVB neurite growth. In “DVB plasticity impacts behavior via dimorphic synaptic connectivity” (page unavailable), it reports an increase in specific synaptic connections with age. It does not directly show that activity reinforces those connections, and its statement that molecular mechanisms are not well understood does not establish that connectivity reinforcement itself has been little studied. (LLM, conf=0.83)

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  • Neurite outgrowth and synapse formation in C. elegans continue through larval development, the L4 stage, and adulthood, and ectopic neurite sprouting continues with aging.

    “Outgrowth of neurites and establishment of synapses in C. elegans occurs throughout larval development and continues through the L4 larval stage and into adulthood, and ectopic neurite sprouting continues as the nervous system ages45,46.”

    From Whole-animal connectomes of both Caenorhabditis elegans sexes (2019) · cites this paper as [45]

    The ‘Morphologic plasticity displayed by adult male DVB neuron’ section reports progressive neurite outgrowth from adult days 1 to 5, and ‘DVB plasticity impacts behavior via dimorphic synaptic connectivity’ reports an increase in specific synaptic connections over that period (page numbers not supplied). The paper does not establish continued outgrowth and synapse formation throughout larval development or the L4 stage, or general ectopic sprouting across the aging nervous system; its adult finding concerns the male DVB neuron. (LLM, conf=0.87)

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Authors
Hart, M. P., & Hobert, O.
Affiliations
Howard Hughes Medical Institute (US)
Corresponding author
Hart, Michael P.
Venue
Nature
Published
2018-01
Volume
553
Issue
7687
Pages
165-170
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2783553962
Cited by
84
References
41
Citations by year
2026: 4 · 2025: 9 · 2024: 11 · 2023: 10 · 2022: 10 · 2021: 12 · 2020: 10 · 2019: 9 · 2018: 9
FWCI
4.55
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health (P40OD010440)
  • National Institute of Diabetes and Digestive and Kidney Diseases (T32DK007328)
  • National Institute of Neurological Disorders and Stroke (R37NS039996, F32NS086285)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
neurexin, neuroligins, neurite outgrowth, synaptic rewiring, male mating behavior, experience-dependent plasticity, adhesion molecules, Caenorhabditis elegans, postsynaptic activity, learning and memory
MeSH terms
Animals, gamma-Aminobutyric Acid, Male, Neuronal Plasticity, Sexual Behavior, Animal, Sex Characteristics, Synapses, Cell Adhesion Molecules, Neuronal, Neurites, Caenorhabditis elegans, Caenorhabditis elegans Proteins, Hermaphroditic Organisms, GABAergic Neurons

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