Figure 2  TLR2 is required for OVA-induced inflammatory cells infiltration, IgE and Th2 cytokines production. (A) Total cell counts in the BALF of WT and TLR2−/− mice. (B–E) Differential cell counts in BALF of WT and TLR2−/− mice. (F) The level of OVA-specific IgE in serum. (G,H) Productions of IL-4 and IL-13 in BALF of WT and TLR2−/− mice were analyzed by ELISA. *p < 0.05, **p < 0.01, ***p < 0.001.