(A) Quantitative reverse transcriptional–polymerase chain reaction (RT-PCR) analysis of factor X (FX) mRNA in lungs obtained from ovalbumin (OVA)-exposed mice (solid bar, n = 6) at 16 wk of treatment versus phosphate-buffered saline (PBS)-treated mice (open bar, n = 6). The values indicate the fold difference relative to RPL19 mRNA. Data represent the mean ± SEM. *p = 0.004 versus PBS-treated mice. (B) Quantitative RT-PCR analysis of FX mRNA in macrophages obtained from bronchoalveolar lavage fluid (BALF) of OVA-exposed mice (solid bar, n = 4) versus PBS-treated mice (open bar, n = 4). Values indicate the fold difference relative to the RPL19 housekeeping gene. Data represent the mean ± SEM. *p < 0.001 versus PBS-treated mice. (C) FXa activity in BALF from OVA-exposed mice (solid bar, n = 5) versus PBS-treated mice (open bar, n = 5) determined by a S-2222–based chromogenic assay. *p = 0.04 versus PBS-treated mice.