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Related Experiment Video

Updated: May 23, 2026

Caenorhabditis Sieve: A Low-tech Instrument and Methodology for Sorting Small Multicellular Organisms
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Electrical sorting of Caenorhabditis elegans.

Pouya Rezai1, Sangeena Salam, Ponnambalam Ravi Selvaganapathy

  • 1JHE-212B, Department of Mechanical Engineering, McMaster University, 1280 Main Street West. Hamilton, ON L8S 4L7, Canada.

Lab on a Chip
|March 31, 2012
PubMed
Summary

Researchers developed a novel electrotaxis method to sort Caenorhabditis elegans (C. elegans) worms by age and size. This passive, cost-effective technique efficiently synchronizes worm populations for biological assays.

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Area of Science:

  • * Developmental biology
  • * Microfluidics
  • * Neuroscience

Background:

  • * Caenorhabditis elegans (C. elegans) is a widely used animal model in biological research.
  • * Synchronized C. elegans populations are crucial for reproducible experimental outcomes.
  • * Current synchronization methods can be time-consuming or require complex setups.

Purpose of the Study:

  • * To develop a novel, efficient, and cost-effective method for synchronizing C. elegans.
  • * To leverage the electrotactic response of C. elegans for parallel sorting.
  • * To enable high-throughput screening and facilitate the study of movement-related defects.

Main Methods:

  • * Development of a microfluidic device utilizing local electric field traps.
  • * Employing the electrotactic response (electric field-induced motion) for worm sorting.
  • * Semi-continuous flow sorting with a minimum throughput of 78 worms/minute/load-run.

Main Results:

  • * Successful parallel sorting of C. elegans based on age, size, and phenotype.
  • * Efficient synchronization of larval and adult worm populations.
  • * Achieved sorting without active imaging or fluorescent markers, relying on innate worm behavior.

Conclusions:

  • * The electrotaxis-based sorting method provides a passive, automatic, and cost-effective solution for C. elegans synchronization.
  • * This technique simplifies and accelerates experiments requiring homogeneous worm cultures.
  • * The method facilitates the isolation of mutants with abnormal electrotaxis and supports advanced microfluidics applications for drug discovery and neuroscience research.