Cited by 348Immunotherapy and Immune ResponsesT-cell and B-cell ImmunologyImmune Response and Inflammation

Origin and steady-state turnover of class II MHC-bearing dendritic cells in the epithelium of the conducting airways.

Holt, P G, Haining, S, Nelson, D J, Sedgwick, J D·1994·The Journal of Immunology

Abstract

Recent studies have identified a contiguous network of class II MHC-bearing dendritic cells (DC) in the airway epithelium of several species, including humans. This network seems comparable to the epidermal Langerhans cell population, comprising up to 700 DC per mm2 of airway epithelium. Moreover, it accounts for virtually all local immunostaining for class II MHC, suggesting an important role in surveillance for inhaled Ag. This study examines the turnover of these airway DC using a radiation chimera model that uses congenic rats expressing different allotypic variants of CD45, detectable via mAbs. Steady-state bone marrow renewal of the airway DC population (which is continuously depleted by migration of mature cells to draining lymph nodes) was interrupted via x-irradiation or high-dose dexamethasone, after which the resident population declined by 85% over the ensuing 72 h. After transplantation with congenic bone marrow and an initial lag period for graft establishment, the airway DC population was rapidly restored to preirradiation levels. These findings indicate a half-life of < or = 2 days for airway epithelial DC. In contrast, epidermal Langerhans cell half-life was > or = 15 days. The only comparable (short) half-life previously reported for a peripheral tissue DC population, is that derived from the gut wall. This indicates that rapidly turning over DC populations are a unique feature of the major "mucosal" organ systems, which is consistent with these DC playing an important role in surveillance of mucosal tissues for incoming Ag.

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Crossref · 10.4049/jimmunol.153.1.256

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  • Many clinical studies have identified positive associations between levels of airway epithelial cell-derived inflammatory mediators and disease severity.

    “Many clinical studies have identified positive associations between levels of airway epithelial cell-derived inflammatory mediators and disease severity.”
  • Dose-related associations were found between several cytokines and chemokines (including IL-8/CXLC8, MIP-1α/CCL3, MCP-1/CCL2, and the IL-6/TNF-α ratio) in respiratory secretions and the severity of RSV bronchiolitis.

    “For instance, dose-related associations were found between several cytokines and chemokines (including IL-8/CXLC8, MIP-1α/CCL3, MCP-1/CCL2, and the IL-6/TNF-α ratio) in respiratory secretions and the severity of RSV bronchiolitis (76, 114, 271)”
  • The associations between inflammatory mediators and RSV bronchiolitis severity suggest a relationship between overly aggressive innate immune responses and disease following infection.

    “suggesting a relationship between overly aggressive innate immune responses and disease following infection.”

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Authors
Holt, P. G., Haining, S., Nelson, D. J., & Sedgwick, J. D.
Affiliations
  • The Kids Research Institute Australia (AU)
  • Centenary Institute (AU)
Venue
The Journal of Immunology
Published
1994-07-01
Volume
153
Issue
1
Pages
256-261
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W1675056235
Cited by
347
References
0
Citations by year
2026: 2 · 2025: 2 · 2024: 6 · 2023: 6 · 2022: 2 · 2020: 5 · 2019: 1 · 2018: 3 · 2017: 11 · 2016: 3 · 2015: 6 · 2014: 7 · 2013: 5 · 2012: 14
FWCI
6.46
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion)
Funders
Wellcome Trust
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
airway epithelium, radiation chimeras, Langerhans cells, mucosal immunity, X-ray irradiation
MeSH terms
Animals, Histocompatibility Antigens Class II, Dendritic Cells, Dexamethasone, Epithelial Cells, Langerhans Cells, Lung, Radiation Chimera, Trachea, X-Rays, Rats

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