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- W2015494188 abstract "<b>Background:</b> Establishing biomarkers to predict asthma outcomes and therapeutic response has great clinical significance. GWAS studies and eQTL databases identified polymorphisms in the <i>EGR1</i> gene associated with asthma characteristics. However, application of a biomarker in a clinical setting requires functional validation. We investigated if EGR-1 plays a role in: 1) deregulation of inflammatory responses of lung epithelium exposed to asthma triggers and 2) response to glucocorticoids. <b>Methods:</b> CRISPR-Cas9 technique was used for targeted knock-out of EGR-1 in NCI-H292 lung epithelium. Mutant cells were exposed to polyIC, house dust mite (HDM), grass pollen (GP), and dexamethasone. Production of inflammatory cytokines, epithelial barrier integrity, tissue regeneration potential as well as production of type 2 cytokines by innate lymphoid cells type 2 (ILC2) in an epithelial cell co-culture model were studied. <b>Results:</b> EGR-1 knockout in lung epithelium resulted in an increased production of pro-inflammatory mediators (IL-6, IL-8, GM-CSF, TNF-a, and IP-10) in response to polyIC, HDM, and GP. EGR-1<sup>-/-</sup> cells displayed reduced sensitivity to dexamethasone in suppressing responses to polyIC and allergens. EGR-1<sup>-/-</sup> cells also displayed increased permeability upon exposure to allergens, reduced expression of tight junction protein ZO-1, and decreased potential for tissue regeneration. Co-culture of EGR-1<sup>-/-</sup> epithelium exposed to polyIC or HDM with ILC2s resulted in increased IL-5/IL-13 production by ILC2s, as compared with ILC2s co-cultured with wild type epithelium. <b>Conclusion:</b> EGR-1 plays a critical role in mediating the exaggerated inflammatory responses of epithelium observed in asthmatic patients." @default.
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- W2015494188 date "2008-12-01" @default.
- W2015494188 modified "2023-09-25" @default.
- W2015494188 title "Impulse oscillometry in comparison to spirometry in pregnant asthmatic females" @default.
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- W2015494188 doi "https://doi.org/10.1183/09031936.00091508" @default.
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