IL5 and asthma: As shown in Figure 3, since CP and OA inhibited IL-5 in BALF and Th2 cytokine (IL-5, IL-4, and IL-13) production in spleen cells, we assessed the mRNA expression of asthma-associated cytokines and mediators in the lung tissues of OVA-induced asthmatic mice using qRT-PCR (Figure 4).