Temporal association between airway hyperresponsiveness and airway eosinophilia in ovalbumin-sensitized mice

Adrian Tomkinson, Grzegorz Cieslewicz, Catherine Duez, Kirsten A. Larson, James J. Lee, Erwin W. Gelfand

Research output: Contribution to journalArticle

143 Scopus citations

Abstract

The temporal association between airway inflammation and airway hyperresponsiveness (AHR) has been analyzed in BALB/c mice sensitized to, and subsequently exposed to, a single intranasal challenge of ovalbumin (OVA). In OVA-sensitized/challenged animals only a small increase in responsiveness to methacholine (MCh) was seen at 8 h, peaked at 24 to 48 h, and resolved by 96 h. An early bronchoalveolar lavage fluid (BALF) neutrophil infiltrate (peaking at 8 h postchallenge; ∼ 72% total cells was observed) that returned to baseline by 48 h. BALF eosinophil numbers did not increase until 48 h (∼ 32% of total cells), peaked at 96 h (∼ 38% total cells), and remained elevated at 8 d (∼ 27% total cells). Airway tissue eosinophilia preceded changes in BALF. Eosinophil peroxidase (EPO) levels in BALF were elevated in OVA-sensitized/challenged mice at 48 h only. BALF TNF-α levels peaked at 8 h, whereas IL-5 and IL-4 levels peaked at 24 h. IL-13 levels were increased at both 24 and 48 h. Mucus-positive cells were not observed in the airway epithelium until 48 h. Administration of IL-5 or VLA-4 antibody prior to OVA challenge prevented the development of AHR in sensitized mice as well as BALF and tissue eosinophilia. These data identify a temporal association between Th2 cytokine production, tissue eosinophil infiltration and activation, and, importantly, both the development and resolution kinetics of AHR. Moreover, the antibody studies further support the association of eosinophilia with the pathogenesis of AHR.

Original languageEnglish (US)
Pages (from-to)721-730
Number of pages10
JournalAmerican journal of respiratory and critical care medicine
Volume163
Issue number3 I
DOIs
StatePublished - Jan 1 2001

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine

Fingerprint Dive into the research topics of 'Temporal association between airway hyperresponsiveness and airway eosinophilia in ovalbumin-sensitized mice'. Together they form a unique fingerprint.

  • Cite this