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Current Allergy and Asthma Reports
Published in: Current Allergy and Asthma Reports 1/2020

01-01-2020 | Omalizumab | Food Allergy (E Kim, Section Editor)

The Role of Eosinophils in Immunotherapy

Authors: Joseph Cafone, Melanie A. Ruffner, Jonathan M. Spergel

Published in: Current Allergy and Asthma Reports | Issue 1/2020

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Abstract

Purpose of Review

The purpose of this review is to provide a brief discussion on the differential diagnosis for peripheral eosinophilia. We will then focus on targeted immunotherapies for atopic disease, their effects on absolute peripheral eosinophil counts, and use of peripheral eosinophils as a predictor of treatment response.

Recent Findings

In atopic disease, lower absolute peripheral eosinophil counts are typically associated with improved outcomes. Much of the current evidence on eosinophils as a biomarker comes from post hoc analyses in therapeutic immunotherapy. While changes in eosinophilia were not the primary outcome of interest in many studies, some patterns did emerge. Cytolytic monoclonal antibodies AK002 and benralizumab completely reduce peripheral and tissue eosinophil numbers. Dupilumab may have paradoxical transient eosinophilia despite observed clinical efficacy.

Summary

Atopic inflammation is complex largely due to the various cytokines which affect eosinophil activation, proliferation, differentiation, and survival. This demonstrates the challenges of using peripheral eosinophilia alone as a biomarker for atopic disease activity. More attention should spotlight how different immunotherapy modalities affect eosinophil-driven responses.
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Metadata
Title
The Role of Eosinophils in Immunotherapy
Authors
Joseph Cafone
Melanie A. Ruffner
Jonathan M. Spergel
Publication date
01-01-2020
Publisher
Springer US
Published in
Current Allergy and Asthma Reports / Issue 1/2020
Print ISSN: 1529-7322
Electronic ISSN: 1534-6315
DOI
https://doi.org/10.1007/s11882-020-0895-x