Translational approaches to the study of eosinophils in vasculitis.

Eosinophil basic biology, including immunoregulatory functions, plays a complex role in a myriad of disorders where eosinophils play a role. Established in vivo and in vitro models and novel emerging techniques for studying eosinophils are integral to parsing the involvement of eosinophils in the pathogenesis of disorders including vasculitis. Knowledge of translational approaches from eosinophil-associated diseases and their application to eosinophilic vasculitis are highlighted. It is becoming increasingly evident that the roles of eosinophils in disease are complex. The use of targeted biological therapies and machine learning has the potential to reveal the contribution of eosinophils in disease pathology.