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Asthma is a heterogeneous disease that can be classified into different clinical endotypes, depending on the type of airway inflammation, clinical severity, and response to treatment. This article focuses on the eosinophilic endotype of asthma, which is defined by the central role that eosinophils play in the pathophysiology of the condition. It is characterized by persistently elevated sputum and/or blood eosinophils and by a significant response to treatments that suppress eosinophilia. Eosinophil activity in the airway may be more important than their numbers and this needs to be investigated. Transcriplomic or Metabolomic signatures may also be useful to identify this endotype.

Original publication




Journal article


Immunol Allergy Clin North Am




609 - 623


Anti-IL-13, Anti-IL-4&13, Anti-IL-5, Biomarkers, Severe asthma, Type-2 cytokines, Anti-Asthmatic Agents, Asthma, Biological Products, Biomarkers, Clinical Trials as Topic, Cytokines, Eosinophilia, Humans, Phenotype, Severity of Illness Index, Th2 Cells, Treatment Outcome