Hematopoietic prostaglandin D synthase defines a proeosinophilic pathogenic effector human TH2 cell subpopulation with enhanced function

peTH2 cells are the primary functional proinflammatory human TH2 cell subpopulation underlying allergic eosinophilic inflammation. The unambiguous phenotypic identification of human peTH2 cells provides a powerful tool to track these cells in future pathogenesis studies and clinical trials.