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- W3109968348 abstract "Eosinophilic inflammation has long been associated with asthma. Looking at systemic and airway eosinophilia, we have recently identified a group of patients exhibiting diffuse eosinophilic inflammation. Among the mechanisms governing eosinophilic inflammation, IgE-mediated mast cell activation is a key event leading to eosinophilia in atopic asthmatics.We conducted a retrospective study on our asthma clinic database containing more than 1500 patients and identified 205 asthmatics with successful sputum induction and concordant eosinophilic phenotype. This phenotype was defined as a sputum eosinophil count≥3% and a blood eosinophils concentration≥400cells/mm3. IgE-high atopic phenotype was characterized by the presence of at least one positive specific IgE (>0.35kU/L) to common aeroallergens and a raised total serum IgE (≥113kU/L).The largest group of asthmatics displaying concordant eosinophilic phenotype had a raised total serum IgE and atopy (45%). IgE-low non-atopic concordant eosinophilic asthma was a predominantly late onset disease, exhibited a more intense airway eosinophilic inflammation (P<0.05), required more often maintenance treatment with oral corticosteroids (P<0.05) but, surprisingly, had a reduced level of bronchial hyperresponsiveness to methacholine (P<0.05) despite similar baseline airway calibre impairment.The more severe airway eosinophilic inflammation in IgE-low non-atopic asthmatics despite similar treatment with ICS and a higher burden of OCS points to a certain corticosteroid resistance in this asthma phenotype." @default.
- W3109968348 created "2020-12-07" @default.
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- W3109968348 date "2021-05-01" @default.
- W3109968348 modified "2023-10-03" @default.
- W3109968348 title "Asthmatics with concordant eosinophilic disease classified according to their serum IgE status" @default.
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- W3109968348 doi "https://doi.org/10.1016/j.resmer.2020.100797" @default.
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