“…Previous studies showed an elevated level of histamine, IgE, TNFand IL-1 in the serum of OVA-sensitized mice (Zhang, Li, Jia, & He, 2015). Other studies showed up-regulation of IL-10 and IFN-in serum in patients with AR compared with a normal population (Bayrak Degirmenci et al, 2018;Uguz, Sanlioglu, Yuzbey, Coskun, & Yegin, 2005). In order to further investigate whether OVA induction could increase the expression level of histamine and other OVA-specific inflammatory factors in vivo, blood specimens were collected on day 21, 24, 27 and 30 followed by ELISA assays, as illustrated in Figure 2.…”