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Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
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2021 year in review: Spotlight on eosinophils.

Julia L M Dunn1, Marc E Rothenberg1

  • 1Division of Allergy and Immunology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio.

The Journal of Allergy and Clinical Immunology
|November 28, 2021
PubMed
Summary

Recent research reveals new insights into eosinophil biology and eosinophilic diseases, particularly in the gastrointestinal tract. Advanced technologies are uncovering complex roles of eosinophils, paving the way for novel therapeutic targets.

Keywords:
Eosinophilsasthmabiologicschronic rhinosinusitisendotypeseosinophilic gastrointestinal diseases

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Area of Science:

  • Immunology
  • Gastroenterology
  • Allergy

Background:

  • Eosinophilic diseases are increasing, necessitating a deeper understanding of eosinophil function.
  • Eosinophils play complex roles in tissue inflammation and immune modulation.

Purpose of the Study:

  • To review recent advances in eosinophil biology and eosinophilic diseases.
  • To highlight the impact of new technologies on understanding these conditions.
  • To discuss the implications for future therapeutic strategies.

Main Methods:

  • Next-generation sequencing
  • Proteomic analysis
  • Machine learning applied to tissue biopsies
  • Analysis of clinical studies using monoclonal antibodies (mAbs)

Main Results:

  • New technologies have elucidated mechanisms of eosinophilic inflammation and identified patient endotypes.
  • Distinct eosinophil activation states in different tissues and diseases have been identified.
  • Eosinophils exhibit both pro- and anti-inflammatory roles in allergic diseases.

Conclusions:

  • A new paradigm of tissue-resident eosinophils with immunomodulatory functions is emerging.
  • Understanding unique eosinophil activation states is key to developing novel therapies.
  • Advances offer potential for targeted treatments for eosinophilic gastrointestinal diseases.