Anti-inflammatory effects of zileuton in a subpopulation of allergic asthmatics

Jeffrey D. Hasday, Susan S. Meltzer, Wendy C. Moore, Peter Wisniewski, J. Richard Hebel, Carmine Lanni, Louise M. Dubé, Eugene R. Bleecker

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

The objective of this study was to determine the effects of allergen exposure on leukotriene generation and inflammation within the airways of allergic asthmatics and evaluate the effects of the 5-lipoxygenase inhibitor zileuton on these responses. We measured leukotriene-B4 (LTB4) and LTC4/D4/E4, inflammatory cytokine mediators, and cellular responses in bronchoalveolar lavage fluid (BALF) before and 24 h after segmental ragweed antigen challenge in 18 asthmatic subjects at baseline. Before initiating therapy with the 5-lipoxygenase inhibitor or placebo, only nine of 18 asthmatic subjects had a significant increase (234 (+) 102-fold, mean (+) SE) in BALF LTC4/D4/E4 levels 24 h after segmental antigen challenge, whereas leukotriene levels were essentially unchanged (1.14 (+) 0.22-fold) in the other nine subjects. The high LT producers also had higher post-antigen BALF levels of LTB4, total protein, IL-5, IL-6, TNF-α, and recovery of more eosinophils than the low LT producers. Treatment with the 5-lipoxygenase inhibitor zileuton reduced postantigen BALF eosinophil count by 68% in the high LT producers, but had no detectable effect on BALF composition in the low LT producers. These data suggest that leukotriene inhibition may be more effective in a subset of asthmatics in whom leukotrienes are a major contributory factor in causing allergic inflammation.

Original languageEnglish (US)
Pages (from-to)1229-1236
Number of pages8
JournalAmerican journal of respiratory and critical care medicine
Volume161
Issue number4 I
DOIs
StatePublished - 2000
Externally publishedYes

ASJC Scopus subject areas

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

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