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Related Experiment Video

Updated: Apr 15, 2026

Ultrastructural Expansion Microscopy in Three In Vitro Life Cycle Stages of Trypanosoma cruzi
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Imaging intraflagellar transport in trypanosomes.

Julien Santi-Rocca1, Nicolas Chenouard2, Cécile Fort1

  • 1Trypanosome Cell Biology Unit, Institut Pasteur & CNRS URA2581, Paris, France.

Methods in Cell Biology
|April 4, 2015
PubMed
Summary

This study reviews methods for studying intraflagellar transport (IFT) in Trypanosoma brucei, a model organism for cilia and flagella research. The described techniques enable detailed analysis of IFT dynamics in living cells and mutant contexts.

Keywords:
Cilia and flagellaImagingIntraflagellar transportTraffickingTrypanosome

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Area of Science:

  • Cell Biology
  • Parasitology
  • Biophysics

Background:

  • Trypanosoma brucei is a eukaryotic pathogen causing sleeping sickness.
  • Its long, motile flagellum makes it a valuable model for studying cilia and flagella assembly and function.
  • Intraflagellar transport (IFT) is crucial for flagellar function and has been studied using light microscopy.

Purpose of the Study:

  • To review methods for expressing fluorescent fusion proteins to visualize IFT in living Trypanosoma brucei.
  • To present techniques for recording and analyzing IFT dynamics, including separating anterograde and retrograde transport.
  • To facilitate the quantification of IFT train speed, frequency, and size in normal and mutant contexts.

Main Methods:

  • Expression of fluorescently tagged proteins involved in IFT.
  • High-resolution light microscopy to record IFT in living trypanosomes.
  • Image analysis techniques to separate anterograde and retrograde IFT trains.
  • Statistical analysis for discriminating IFT train subpopulations.

Main Results:

  • Established methods allow for detailed visualization and quantification of IFT in Trypanosoma brucei.
  • The techniques enable the analysis of IFT in both wild-type and mutant strains.
  • Separation of transport directions allows for precise measurement of IFT parameters.

Conclusions:

  • The reviewed methods are efficient for studying IFT in Trypanosoma brucei.
  • These techniques can be adapted for IFT research in other model organisms.
  • This work provides a framework for deeper understanding of flagellar biology.