Figure 4. Arctiin ameliorated OVA-induced lung tissue impairment. C57BL/6 mice were divided into four groups: vehicle, Arctiin, OVA, and OVA+ Arctiin. (A) BALF protein concentrations; (B) Lung wet to dry weight ratio; (C) Lung MPO activity (n = 12, **P < 0.01 vs. vehicle group; ##P < 0.01 vs. OVA group).