Cited by 251IL-33, ST2, and ILC PathwaysAsthma and respiratory diseasesStudies on Chitinases and Chitosanases

Chitin activates parallel immune modules that direct distinct inflammatory responses via innate lymphoid type 2 and γδ T cells

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Van Dyken, Steven J., Mohapatra, Alexander, Nussbaum, Jesse C., Molofsky, Ari B., Thornton, Emily E., Ziegler, Steven F., McKenzie, Andrew N.J., Krummel, Matthew F. +2 more·2014·Immunity

Abstract

Chitin, a polysaccharide constituent of many allergens and parasites, initiates innate type 2 lung inflammation through incompletely defined pathways. We show that inhaled chitin induced expression of three epithelial cytokines, interleukin-25 (IL-25), IL-33, and thymic stromal lymphopoietin (TSLP), which nonredundantly activated resident innate lymphoid type 2 cells (ILC2s) to express IL-5 and IL-13 necessary for accumulation of eosinophils and alternatively activated macrophages (AAMs). In the absence of all three epithelial cytokines, ILC2s normally populated the lung but failed to increase IL-5 and IL-13. Although eosinophils and AAMs were attenuated, neutrophil influx remained normal without these epithelial cytokines. Genetic ablation of ILC2s, however, enhanced IL-1β, TNFα, and IL-23 expression, increased activation of IL-17A-producing γδ T cells, and prolonged neutrophil influx. Thus, chitin elicited patterns of innate cytokines that targeted distinct populations of resident lymphoid cells, revealing divergent but interacting pathways underlying the tissue accumulation of specific types of inflammatory myeloid cells.

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Authors
Van Dyken, S. J., Mohapatra, A., Nussbaum, J. C., Molofsky, A. B., Thornton, E. E., Ziegler, S. F., McKenzie, A. N. J., Krummel, M. F., Liang, H.-E., & Locksley, R. M.
Affiliations
  • Howard Hughes Medical Institute (US)
  • University of California, San Francisco (US)
  • Benaroya Research Institute (US)
  • MRC Laboratory of Molecular Biology (GB)
Corresponding author
Locksley, Richard M.
Venue
Immunity
Publisher
Elsevier BV
Published
2014-03
Volume
40
Issue
3
Pages
414-424
ISSN
1074-7613 (ISSN-L)
OpenAlex
W2097384956
Cited by
251
References
53
Citations by year
2026: 12 · 2025: 11 · 2024: 12 · 2023: 16 · 2022: 10 · 2021: 18 · 2020: 15 · 2019: 31 · 2018: 35 · 2017: 20 · 2016: 24 · 2015: 22 · 2014: 25
FWCI
13.86
Type
journal article
Language
en
Open access
Locations
  • Immunity (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institutes of Health (AI030663, AI026918, HL107202)
  • Howard Hughes Medical Institute
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › IL-33, ST2, and ILC Pathways
  • Health Sciences › Medicine › Physiology › Asthma and respiratory diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Studies on Chitinases and Chitosanases
Keywords
chitin, γδ T cells, IL-25, IL-33, thymic stromal lymphopoietin, epithelial cytokines, IL-5, IL-13, eosinophils, M2 macrophages, neutrophil influx, IL-17A, lung inflammation, innate immunity
MeSH terms
Animals, Chitin, Eosinophils, Gene Expression Regulation, Immunity, Innate, Inflammation, Lung, Lymphocyte Activation, Macrophage Activation, Macrophages, T-Lymphocyte Subsets, Cytokines, Receptors, Antigen, T-Cell, gamma-delta, Mice, Knockout, Mice

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