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Live Imaging of the Ependymal Cilia in the Lateral Ventricles of the Mouse Brain
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The cilium secretes bioactive ectosomes.

Christopher R Wood1, Kaiyao Huang, Dennis R Diener

  • 1Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06520, USA.

Current Biology : CB
|April 30, 2013
PubMed
Summary
This summary is machine-generated.

Researchers discovered that Chlamydomonas algae use specialized vesicles, called ciliary ectosomes, released from flagella to degrade the mother cell wall. This process liberates daughter cells, highlighting cilia as a source of extracellular vesicles.

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Last Updated: May 11, 2026

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06:58

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Published on: June 1, 2015

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Area of Science:

  • Cell Biology
  • Extracellular Vesicles
  • Algal Biology

Background:

  • Cell-to-cell communication and extracellular matrix remodeling involve membrane vesicles like exosomes and ectosomes.
  • Proteolytic enzyme release is crucial for developmental processes, including extracellular matrix degradation.

Purpose of the Study:

  • To investigate the mechanism of mother cell wall degradation in Chlamydomonas.
  • To identify the role of extracellular vesicles in releasing daughter cells.

Main Methods:

  • Immunoelectron microscopy
  • Immunofluorescence microscopy
  • Functional analysis

Main Results:

  • Chlamydomonas releases ciliary ectosomes from flagellar membranes.
  • These vesicles carry proteolytic enzymes essential for degrading the mother cell wall.
  • Ciliary ectosomes facilitate the liberation of daughter cells post-mitosis.

Conclusions:

  • Cilia are a source of bioactive extracellular vesicles.
  • Ciliary ectosomes play a key role in Chlamydomonas cell wall degradation and cell release.
  • This finding suggests cilia may be an underappreciated source of extracellular vesicles in other organisms.