A, Flow cytometric gating strategy for analysis of macrophages in dispersed lung cell suspensions. B-F, WT or St2−/− mice were administered intranasally with PBS or bleomycin, and lung tissue harvested on day 7 was dispersed. The percentage of macrophage subsets in the tissue was determined by using flow cytometry. The percentage of macrophages (Fig E4, B), percentage of CD206+ (M2) macrophages (Fig E4, C), percentage of IL-33+ M2 macrophages (Fig E4, D), isotype control for the anti–IL-33–PE staining (Fig E4, E), and percentage and total number of MHC class II–positive macrophages (Fig E4, F) are shown. Vertical bars = SEMs (n = 5-6 mice per group per experiment). *P < .05 compared with control values. Data are representative of 2 experiments. N.S., Not significant.