Interleukin-13, but Not Indomethacin, Increases Cysteinyl-Leukotriene Synthesis in Human Lung Macrophages
Open Access
- 29 October 2011
- journal article
- research article
- Published by Hindawi Limited in Journal of Allergy
- Vol. 2012, 1-6
- https://doi.org/10.1155/2012/348741
Abstract
Aspirin-exacerbated respiratory disease (AERD) is associated with constitutively elevated synthesis of bronchoconstrictor cysteinyl-leukotrienes, associated with increased expression of leukotriene (LT)C4 synthase and Th2 cytokines and airway eosinophilia. We examined whether interleukin-13 can increase LTC4 synthase gene transcription and cysteinyl-leukotriene synthesis in macrophages isolated from resected human lung tissue and whether an NSAID (indomethacin) can trigger further cysteinyl-leukotriene synthesis in these cells. Overnight culture of human lung macrophages with IL-13 (10 ng/mL) increased spontaneous and ionophore-stimulated production of cysteinyl-leukotrienes by 42% () and 52% (), respectively, as quantified by enzyme immunoassays, but PCR gene transcription assays did not demonstrate an effect on LTC4S mRNA. The addition of indomethacin (100 μM) did not modulate cysteinyl-leukotriene production in either IL-13-treated or untreated macrophages. We conclude that while IL-13 enhances cysteinyl-leukotriene synthesis in human lung macrophages, it does not replicate the enhanced LTC4 synthase expression observed in the AERD lung nor confer sensitivity to NSAIDs.
Keywords
Funding Information
- Foundation of the American College of Allergy, Asthma & Immunology
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