(A) FoxO1fl/fl and FoxO1fl/flLysMcre mice were sensitized and challenged by daily i.n.
administration of DRA or saline, 3 days a week for 2 weeks. (B) Relative expression of FoxO1 in sorted AM. FoxO1 mRNA was analyzed
by rt-qPCR. (C) Eosinophilic inflammation was attenuated in FoxO1fl/flLysMcre mice. Total cells and eosinophils influx
in BAL fluid were counted, analyzed by flow cytometry. (D) Cell staining for markers of eosinophils
(CD45+SiglecF+CD11c-) and AM (CD45+SiglecF+CD11c+). (E)
Expression of mRNA for IRF4, Ccl17, Ccl22 in DRA-exposed murine AM from FoxO1fl/fl and FoxO1fl/flLysMcre
mice. (F) PAS stained (black arrowheads) lung sections from the mice exposed to DRA. (G) IL-5, IL-13, CCL17, CCL22 were quantified
with ELISA in BALF and DRA-exposed lung homogenates (N=6–8). Results are shown as mean ± SE. P values were obtained
using a t test. *p<0.05, **p<0.01, and ***p<0.001. i.p., intraperitoneal; i.n., intranasal; Eos, eosinophil;
Mac/Mono, macrophage/monocyte.