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. 2014 Sep 5;9(9):e106807. doi: 10.1371/journal.pone.0106807

Figure 1. Functions of rAg85B in allergic inflammation.

Figure 1

Experimental design used to investigate the effects of rAg85B on OVA-induced allergic lung inflammation (A). BALB/c mice were intraperitoneally immunized with OVA on days 0 and 14. On days 21 to 25 after the first immunization, mice were exposed to aerosolized 5% OVA for 20 min. Three hours prior to OVA inhalation, the mice were i.p. (100 µg; days 0 and 14) and i.n. (20 µg; days 21, 23, and 25) administered rAg85B. One day after the last challenge, the BAL cells were counted (B) and OVA-specific serum IgE concentrations were determined by ELISA (C). Flow cytometry of BAL cells from naïve or OVA sensitized BALB/c mice treated with PBS or rAg85B, stained with anti-Gr-1 and anti-Siglec-F. Numbers adjacent to outlined area indicate percent of eosinophils (Gr-1dull, Siglec-F+), and neutrophils (Gr-1+, Siglec-Fneg) (D). Formalin-fixed tissue sections were stained with hematoxylin and eosin to visualized cell recruitment (upper row, scale bar, 100 mm), Masson's trichrome (center row, scale bar, 100 mm), and α-smooth muscle actin (lower row, scale bar, 50 mm). Numbers in quadrants indicate the score scale from 0 to 5 in each. (E). Data are representative of at least three independent experiments. (*P<0.05, **P<0.01 compared with OVA control. error bars, s.d.; n = 6 mice).