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Related Experiment Videos

Eokines: synthesis, storage and release from human eosinophils

P Lacy1, R Moqbel

  • 1Department of Medicine, University of Alberta, Edmonton, Canada. redwan.moqbel@ualberta.ca

Memorias Do Instituto Oswaldo Cruz
|January 1, 1997
PubMed
Summary

Eosinophils synthesize and release regulatory proteins called eokines, including interleukins and growth factors. This finding suggests eosinophils play a more active role in immunity than previously understood.

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Eosinophils are key inflammatory cells in allergic diseases and parasitic infections.
  • These cells contain secretory granules storing regulatory proteins, termed eokines.

Purpose of the Study:

  • To review the identified eokines synthesized and stored by eosinophils.
  • To highlight the role of eosinophils in immune responses.

Main Methods:

  • Subcellular fractionation and immunogold labeling in electron microscopy.
  • Detection of mRNA using in situ hybridization and RT-PCR.

Main Results:

  • Eosinophils synthesize and store at least 18 eokines, including IL-2, IL-4, GM-CSF, and RANTES.
  • These eokines are localized in eosinophil secretory granules and released upon stimulation.

Related Experiment Videos

  • Evidence supports de novo synthesis of eokines by eosinophils.

    • Conclusions:

    • Eosinophils actively produce and release immune-modulating proteins (eokines).
    • This challenges the traditional view of eosinophils as solely downstream effectors, suggesting a role in initiating immune responses.