Quantitative analysis was performed after densitometric scanning, and the results were normalized to internal control GAPDH. Immunofluorescence
staining of STIM1 translocation in RPMCs was performed as described previously . Briefly, after fixation, permeabilization and blocking, the cells were incubated with rabbit anti-rat STIM1 antibody (1:100 dilution) at 4 °C overnight. Subsequently after three washes with PBS, the cells were incubated with FITC-conjugated secondary antibody (goat anti-rabbit IgG, 1:1000) for 1 h at room temperature. Signals were then detected by Olympus 1000 confocal microscope (Olympus, Japan). Control staining was carried out with non-immune IgG used at the Abiraterone order same concentration as the primary antibody. Six randomly selected fields in each sample in an individual experiment were scored, and at least three independent experiments were performed. The contents of tumour necrosis factor-α (TNFα), interleukin-4 (IL-4), interleukin-10 (IL-10), interferon-g (IFNγ) and histamine in rat peritoneal lavage solution (RPLS) and serum were assayed by commercial ELISA kits using paired antibodies according to
the manufacturer’s instructions. The kits for detecting TNF-α, IL-4, IL-10 and IFN-γ were bought from eBioscience (USA), and the kit for detecting histamine was bought from GSK3235025 in vitro R&D Inc. (Minneapolis, MN, Minneapolis, MN, USA). Serum IgE levels were also detected using a commercial ELISA kit (BD Biosciences Pharmingen,
San Jose, CA, USA), following the manufacturer’s Farnesyltransferase instructions. Data are presented as means ± SD. When two comparisons were obtained, Student’s unpaired two-tailed t test was used. When multiple comparisons were obtained, the analyses consisted of one-way anova for repeated measures and Student–Newman–Keuls multiple comparison test. A value of P < 0.05 was considered to be statistically significant. In the present study, we used OVA oral sensitization to establish food-allergic model in Brown-Norway rats as previously reported . The cytokine levels in RPLS were measured by ELISA. The results showed that type Th2 cytokines (IL-4, 11.8 ± 1.52 pg/ml; IL-10, 101.3 ± 15.37 pg/ml) were significantly higher than those in control groups (IL-4, 3.73 ± 0.18 pg/ml;IL-10, 61.66 ± 8.33 pg/ml; Fig. 1A). However, the concentrations of type Th1 cytokines, including IL-2 and IFNγ, were similar to those in control group. The above results indicate that the ratio of Th1/Th2 was decreased, and the balance of Th1/Th2 was skewed in OVA-induced food-allergic model. ELISA analysis showed that the concentrations of OVA-specific IgE in both serum and RPLS were significantly higher (0.23 ± 0.03 versus ctrl 0.16 ± 0.01 μg/ml in serum; 0.45 ± 0.04 versus ctrl 0.37 ± 0.01 μg/ml in RPLS) in OVA-induced food-allergic group (Fig. 1B).