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- W2914280473 abstract "Summary Background Asthma is a chronic inflammatory condition of the airways and patients sensitized to airborne fungi such as Aspergillus fumigatus have more severe asthma. Thickening of the bronchial subepithelial layer is a contributing factor to asthma severity for which no current treatment exists. Airway epithelium acts as an initial defence barrier to inhaled spores, orchestrating an inflammatory response and contributing to subepithelial fibrosis. Objective We aimed to analyse the production of pro‐fibrogenic factors by airway epithelium in response to A fumigatus , in order to propose novel anti‐fibrotic strategies for fungal‐induced asthma. Methods We assessed the induction of key pro‐fibrogenic factors, TGF‐β1, TGF‐β2, periostin and endothelin‐1, by human airway epithelial cells and in mice exposed to A fumigatus spores or secreted fungal factors. Results Aspergillus fumigatus specifically caused production of endothelin‐1 by epithelial cells in vitro but not any of the other pro‐fibrogenic factors assessed. A fumigatus also induced endothelin‐1 in murine lungs, associated with extensive inflammation and airway remodelling. Using a selective endothelin‐1 receptor antagonist, we demonstrated for the first time that endothelin‐1 drives many features of airway remodelling and inflammation elicited by A fumigatus . Conclusion Our findings are consistent with the hypothesis that elevated endothelin‐1 levels contribute to subepithelial thickening and highlight this factor as a possible therapeutic target for difficult‐to‐treat fungal‐induced asthma." @default.
- W2914280473 created "2019-02-21" @default.
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- W2914280473 date "2019-03-18" @default.
- W2914280473 modified "2023-10-14" @default.
- W2914280473 title "Endothelin‐1 mediates <i>Aspergillus fumigatus</i> ‐induced airway inflammation and remodelling" @default.
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- W2914280473 doi "https://doi.org/10.1111/cea.13367" @default.
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