Eosinophils and Their Role in Allergy and Related Diseases

A special issue of Cells (ISSN 2073-4409). This special issue belongs to the section "Cellular Immunology".

Deadline for manuscript submissions: 28 February 2025 | Viewed by 664

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559 HMRC, Alberta Respiratory Centre, Department of Medicine, University of Alberta, Edmonton, AB T6G 2R3, Canada
Interests: allergy; immunology
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Dear Colleagues,

Eosinophils are enigmatic cells whose functional role within the immune system is still under intense scrutiny, and this has led to a greater appreciation of the contribution of eosinophils to allergy and related diseases. Understanding their function in these diseases has become especially pertinent since the introduction of highly successful anti-eosinophil biologic therapies to treat eosinophil-associated allergic diseases. In this Special Issue, we extend our understanding of the role of eosinophils in allergy, asthma, and related diseases. How eosinophils become elevated and activated, and the factors required for their proliferation and release of inflammatory mediators in allergies, are topics of interest in this collection of articles. I therefore welcome review and original research articles that are focused on the role of eosinophils in this domain. These articles should describe the function of eosinophils in allergic inflammation and how these may be modified by therapies such as anti-eosinophil biologics. Articles should also focus on feasible drug targets to regulate the number and activity of eosinophils in allergic diseases.

Prof. Dr. Paige Lacy
Guest Editor

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Keywords

  • eosinophils
  • asthma
  • allergy
  • inflammation
  • anti-eosinophil biologics
  • interleukin-5
  • interleukin-5 receptor
  • degranulation
  • mediator release

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Published Papers (1 paper)

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Research

23 pages, 3349 KiB  
Article
Evidence for a Role of the Long Non-Coding RNA ITGB2-AS1 in Eosinophil Differentiation and Functions
by Timothée Fettrelet, Aref Hosseini, Jacqueline Wyss, Joanna Boros-Majewska, Darko Stojkov, Shida Yousefi and Hans-Uwe Simon
Cells 2024, 13(23), 1936; https://doi.org/10.3390/cells13231936 - 22 Nov 2024
Viewed by 479
Abstract
Eosinophils, a type of granulocyte derived from myeloid precursors in the bone marrow, are distinguished by their cytoplasmic granules. They play crucial roles in immunoregulation, tissue homeostasis, and host defense, while also contributing to the pathogenesis of various inflammatory diseases. Although long non-coding [...] Read more.
Eosinophils, a type of granulocyte derived from myeloid precursors in the bone marrow, are distinguished by their cytoplasmic granules. They play crucial roles in immunoregulation, tissue homeostasis, and host defense, while also contributing to the pathogenesis of various inflammatory diseases. Although long non-coding RNAs (lncRNAs) are known to be involved in eosinophilic conditions, their specific expression and functions within eosinophils have not been thoroughly investigated, largely due to the reliance on tissue homogenates. In an effort to address this gap, we analyzed publicly available high-throughput RNA sequencing data to identify lncRNAs associated with eosinophilic conditions. Among the identified lncRNAs, ITGB2 antisense RNA 1 (ITGB2-AS1) was significantly downregulated in blood eosinophils from patients with hypereosinophilia. To further explore its role in eosinophil biology, we generated a stable ITGB2-AS1 knockdown in the HL-60 cell line. Interestingly, ITGB2-AS1 deficiency led to impaired eosinophil differentiation, as evidenced by a reduction in cytoplasmic granules and decreased expression of key eosinophil granule proteins, including eosinophil peroxidase (EPX) and major basic protein-1 (MBP-1). Additionally, ITGB2-AS1-deficient cells exhibited compromised eosinophil effector functions, with reduced degranulation and impaired production of reactive oxygen species (ROS). These findings suggest that ITGB2-AS1 plays a pivotal role in eosinophil differentiation and function, positioning it as a novel regulator in eosinophil biology. Full article
(This article belongs to the Special Issue Eosinophils and Their Role in Allergy and Related Diseases)
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