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Related Experiment Video

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In Vivo Imaging of Dauer-specific Neuronal Remodeling in C. elegans
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Long-term imaging reveals behavioral plasticity during C. elegans dauer exit.

Friedrich Preusser1,2, Anika Neuschulz3,4, Jan Philipp Junker3

  • 1Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), 10115, Berlin, Germany. flpreusser@gmail.com.

BMC Biology
|December 13, 2022
PubMed
Summary

Scientists developed WormObserver, an open hardware platform, to study how Caenorhabditis elegans larvae make decisions to exit the dauer stage. Bacterial ingestion was found to trigger neuropeptide gene expression, enabling adaptation to new environments.

Keywords:
Behavioral imagingC. elegans dauerNeuroplasticity

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Animal Behavior

Background:

  • Animals adapt behavior to changing environments through nervous system adjustments.
  • Caenorhabditis elegans larvae enter a stress-resistant dauer stage under unfavorable conditions.
  • Environmental stimuli regulating dauer exit decisions remain largely unknown.

Purpose of the Study:

  • Investigate environmental stimuli regulating dauer exit in C. elegans.
  • Provide insights into behavioral changes over extended periods.
  • Develop a method for long-term imaging of C. elegans larvae.

Main Methods:

  • Developed WormObserver: an open hardware and software platform for long-term (12h) C. elegans imaging.
  • Acquired and processed large image datasets (>80k images/experiment).
  • Combined long-term behavioral imaging with transcriptomics data.

Main Results:

  • Identified dauer-specific behavioral motifs and characterized dauer exit trajectories.
  • Characterized key decision points and stimuli promoting dauer exit.
  • Found bacterial ingestion triggers neuropeptide gene expression for post-dauer behavior.

Conclusions:

  • Demonstrated robust integration of environmental changes by the developing nervous system.
  • Showcased activation of a developmental switch to adapt behavior to new environments.
  • Highlighted WormObserver's applicability for studying behavioral plasticity in C. elegans and beyond.