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Equine asthma: Integrative biologic relevance of a recently proposed nomenclature

Abstract : The term "equine asthma" has been proposed as a unifying descriptor of inflammatory airway disease (IAD), recurrent airway obstruction (RAO), and summer pasture-associated obstructive airway disease. Whilst the term will increase comprehensibility for both the lay and scientific communities, its biologic relevance must be compared and contrasted to asthma in human medicine, recognizing the limited availability of peer-reviewed equine-derived data, which are largely restricted to clinical signs, measures of airway obstruction and inflammation and response to therapy. Such limitations constrain meaningful comparisons with human asthma phenotypes. Suggested minimum inclusion criteria supporting the term asthma, as well as similarities and differences between IAD, RAO, and multiple human asthma phenotypes are discussed. Furthermore, differences between phenotype and severity are described, and typical features for equine asthma subcategories are proposed. Based on shared features, we conclude that mild/moderate (IAD) and severe (RAO) equine asthma are biologically appropriate models for both allergic and non-allergic human asthma, with RAO (severe equine asthma) also being an appropriate model for late-onset asthma. With the development of new biologic treatments in humans and the application of more targeted therapeutic approaches in the horse, it would appear appropriate to further investigate the allergic (Th-2) and non-allergic (non-Th-2) phenotypes of equine asthma. Further research is required to more fully determine the potential clinical utility of phenotype classification.
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Submitted on : Friday, June 28, 2019 - 11:16:52 AM
Last modification on : Friday, September 18, 2020 - 12:31:16 PM

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Stephanie Bond, Renaud Léguillette, Eric Richard, Laurent Couëtil, Jean-Pierre Lavoie, et al.. Equine asthma: Integrative biologic relevance of a recently proposed nomenclature. Journal of Veterinary Internal Medicine, Wiley, 2018, 32 (6), pp.2088-2098. ⟨10.1111/jvim.15302⟩. ⟨hal-02167839⟩

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