Figure 1.
(A) Lymphocytes were identified from whole PBMCs (left) and lineage-negative cells gated (middle). Lineage-negative lymphocytes were further assessed for expression of CD127 and CRTH2 or isotype control staining (right). ILC2 were identified as lineage-negative CRTH2+ lymphocytes. Example shown is 4 hours after cat allergen exposure in cat allergic individual (B) ILC2 (left) and CRTH2+ CD4+ cells (middle) were analyzed for baseline CD84 expression in cat allergic individuals and change in MFI compared with respective isotype determined (right). **P < 0.005, t-test, n= 5 individual subjects.