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Airway hyperresponsiveness is associated with activated CD4+ T cells in the airways

Citation

Zosky, GR and Larcombe, AN and White, OJ and Burchell, JT and von Garnier, C and Holt, PG and Turner, DJ and Wikstrom, ME and Sly, PD and Stumbles, PA, Airway hyperresponsiveness is associated with activated CD4+ T cells in the airways, American Journal of Physiology: Lung Cellular and Molecular Physiology, 297, (2) pp. L373-9. ISSN 1040-0605 (2009) [Refereed Article]

DOI: doi:10.1152/ajplung.00053.2009

Abstract

It is widely accepted that atopic asthma depends on an allergic response in the airway, yet the immune mechanisms that underlie the development of airway hyperresponsiveness (AHR) are poorly understood. Mouse models of asthma have been developed to study the pathobiology of this disease, but there is considerable strain variation in the induction of allergic disease and AHR. The aim of this study was to compare the development of AHR in BALB/c, 129/Sv, and C57BL/6 mice after sensitization and challenge with ovalbumin (OVA). AHR to methacholine was measured using a modification of the forced oscillation technique in anesthetized, tracheostomized mice to distinguish between airway and parenchymal responses. Whereas all strains showed signs of allergic sensitization, BALB/c was the only strain to develop AHR, which was associated with the highest number of activated (CD69(+)) CD4(+) T cells in the airway wall and the highest levels of circulating OVA-specific IgG(1). AHR did not correlate with total or antigen-specific IgE. We assessed the relative contribution of CD4(+) T cells and specific IgG(1) to the development of AHR in BALB/c mice using adoptive transfer of OVA-specific CD4(+) T cells from DO11.10 mice. AHR developed in these mice in a progressive fashion following multiple OVA challenges. There was no evidence that antigen-specific antibody had a synergistic effect in this model, and we concluded that the number of antigen-specific T cells activated and recruited to the airway wall was crucial for development of AHR.

Item Details

Item Type:Refereed Article
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Respiratory Diseases
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Respiratory System and Diseases (incl. Asthma)
UTAS Author:Zosky, GR (Professor Graeme Zosky)
ID Code:89476
Year Published:2009
Web of Science® Times Cited:17
Deposited By:Medicine
Deposited On:2014-03-05
Last Modified:2014-03-05
Downloads:0

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