Though the mechanism by which moderate AE reduces airway inflammation is not completely understood, previous studies have demonstrated that AE reduces nuclear factor kappa light-chain enhancer of activated B cells (NF-κB) activation and increases release of anti-inflammatory cytokine interleukin (IL)-10 (12–17). In mice, chronic ovalbumin (OVA) exposure reproduces some hallmarks of human allergic asthma, including allergen-dependent sensitization, a Th2-dependent allergic inflammation characterized by eosinophilic influx into the airway mucosa, and AHR (22). Both leukocytes and stimulated airway epithelium produce LTs, which contribute to NF-κB activation and drive the inflammatory process in OVA-stimulated mice (23). Therefore, the aim of this study was to test whether moderate AE attenuates LT pathway activation in the OVA model, as LT signaling is an important contributor to inflammation in both allergic asthma and EIB.