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Related Experiment Video

Updated: Sep 26, 2025

Visualizing Neuroblast Cytokinesis During C. elegans Embryogenesis
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Interneuron control of C. elegans developmental decision-making.

Cynthia M Chai1, Mahdi Torkashvand2, Maedeh Seyedolmohadesin2

  • 1Division of Biology and Biological Engineering, California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125, USA.

Current Biology : CB
|April 21, 2022
PubMed
Summary
This summary is machine-generated.

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A male-derived volatile sex pheromone in Caenorhabditis nematodes identified through its mimicry by a predator.

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Joubert syndrome gene <i>fam149b1</i> homolog, <i>xbx-4</i> , is required for multiple sensory behaviors.

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The forkhead transcription factor FKH-7/FOXP acts in Caenorhabditis elegans chemosensory neurons to shape a life history strategy.

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This study reveals how Caenorhabditis elegans uses specific interneurons and neuropeptide signaling to integrate environmental cues, influencing developmental decisions like diapause entry for adaptive plasticity.

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Animal Behavior

Background:

  • Animals must integrate dynamic environmental cues for adaptive responses.
  • Developmental plasticity allows organisms to adjust to predicted future environments.
  • Neural mechanisms linking sensory input to developmental fate decisions are not fully understood.

Purpose of the Study:

  • To identify neural circuits integrating environmental cues for long-term developmental decisions.
  • To elucidate the molecular pathways controlling adaptive developmental plasticity in response to sensory information.
  • To understand how sensory systems are repurposed for decisions across different timescales.

Main Methods:

  • Investigated Caenorhabditis elegans larval development and sensory pathways.
Keywords:
G-protein coupled receptorcircuitsdevelopmental plasticityinterneuronmetabolismmetabotropic glutamate receptorneuropeptidepheromonephysiology

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  • Utilized genetic and molecular techniques to trace neural signaling.
  • Focused on amphid interneurons and neuropeptide signaling pathways (FLP-2, MGL-1, NPR-30).

    • Main Results:

    • Identified specific amphid interneurons that integrate pheromone cues to control larval developmental fate.
    • Discovered that AIA interneuron-derived FLP-2 neuropeptide signaling promotes reproductive growth.
    • Showed that FLP-2 signaling is inhibited by pheromones via MGL-1 and NPR-30, demonstrating metabotropic signaling's role.
    • Demonstrated that this pathway bypasses the pre-motor system for long-term decisions.

    Conclusions:

    • Specific interneurons and neuropeptide signaling pathways integrate sensory cues to regulate developmental plasticity.
    • Metabotropic signaling allows sensory systems to be reused for decisions on distinct developmental timescales.
    • This provides fundamental insights into neural decision-making and adaptive strategies in dynamic environments.