The effect of quercetin and montelukast on mRNA expression of pro-inflammatory cytokines in OVA induced allergic rhinitis in rats. A, TNF-α; B, IL-1β; C, IL-10; D, INF-ϒ. The method described in the material and methods. The data are presented in mean±SEM. *P<0.05,*P<0.01 and ***P<0.001 compared with the AR control group.