Journal
JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY
Volume 127, Issue 4, Pages 1046-U311Publisher
MOSBY-ELSEVIER
DOI: 10.1016/j.jaci.2010.12.1117
Keywords
Asthma; airway remodeling; T(H)17; airway smooth muscle cells; migration
Categories
Funding
- Canadian Institutes of Health Research
- Costello Memorial Fund
- McGill University Health Centre-Research Institute of les Fonds de la Recherche en Sante Quebec
- GlaxoSmithKline
- Merck Frosst Canada
- Genentech
- STRAUSS Foundation
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Background: Migration of airway smooth muscle cells (ASMCs) might contribute to increased airway smooth muscle mass in asthma. T(H)17 cells and T(H)17-associated cytokines are involved in the pathogenesis of asthma and might also contribute to airway remodeling. Objective: We sought to explore the possibility that migration of ASMCs might contribute to airway remodeling through the action of T(H)17-related cytokines. Methods: The effect of exogenous T(H)17 cytokines on ex vivo human ASMC migration was investigated by using a chemotaxis assay. The involvement of signaling pathways, including p38 mitogen-activated protein kinase (MAPK), extracellular signal-regulated kinase 1/2 MAPK, nuclear factor kappa B, and phosphoinositide 3-kinase, was also examined. Results: We demonstrated that IL-17A, IL-17F, and IL-22 promote migration in a dose-dependent manner. We further demonstrated that ASMCs express receptors for IL-17RA, IL-17RC, and IL-22R1. Using mAbs directed against these receptors, we confirmed that T(H)17-associated cytokine-induced migration was dependent on selective receptor activation. Moreover, IL-17A and IL-17F exert their effects through signaling pathways that are distinct from those used by IL-22. The p38 MAPK inhibitor BIRB0796 inhibited the migration induced by IL-17A and IL-17F. PS1145, an inhibitor of nuclear factor kB, abolished the IL-22-induced migration. Conclusion: These data raise the possibility that T(H)17-associated cytokines promote human ASMC migration in vivo and suggest an important new mechanism for the promotion of airway remodeling in asthma. (J Allergy Clin Immunol 2011;127:1046-53.)
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