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Exophers to feed them all.

Erin J Cram1

  • 1Department of Biology, Northeastern University, Boston, MA, USA.

EMBO Reports
|July 21, 2021
PubMed
Summary
This summary is machine-generated.

Cells release extracellular vesicles called exophers to remove damaged components. In C. elegans, embryos stimulate muscle cells to produce yolk-rich exophers that nourish developing oocytes, revealing a novel role for these vesicles in reproduction.

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Area of Science:

  • Cell biology
  • Developmental biology
  • Nematode research

Background:

  • Cells utilize extracellular vesicles (EVs) for intercellular communication and waste removal.
  • In C. elegans, neurons release large EVs called exophers to clear cellular damage.
  • The precise function of exophers beyond waste removal remains largely unexplored.

Purpose of the Study:

  • To investigate novel functions of extracellular vesicles (exophers) in the nematode C. elegans.
  • To explore the role of exophers in the context of reproduction and embryonic development.

Main Methods:

  • Utilized the nematode C. elegans model system.
  • Employed microscopy and genetic techniques to observe exopher production and uptake.
  • Analyzed the contents and function of exophers in relation to embryonic development.

Main Results:

  • Demonstrated that developing embryos stimulate body wall muscle cells to release exophers.
  • Showed that these exophers are specifically laden with yolk.
  • Confirmed that oocytes take up these yolk-rich exophers to nourish the next generation of embryos.

Conclusions:

  • Extracellular vesicles (exophers) play a critical role in nutrient transfer for reproduction in C. elegans.
  • This study uncovers a new mechanism of maternal provisioning via exophers.
  • Exophers serve a dual role in cellular maintenance and reproductive nourishment.