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  • Title: Eleutheroside B increase tight junction proteins and anti-inflammatory cytokines expression in intestinal porcine jejunum epithelial cells (IPEC-J2).
    Author: Che D, Zhao B, Fan Y, Han R, Zhang C, Qin G, Adams S, Jiang H.
    Journal: J Anim Physiol Anim Nutr (Berl); 2019 Jul; 103(4):1174-1184. PubMed ID: 30990939.
    Abstract:
    Eleutheroside B (EB) is a phenylpropanoid glycoside with anti-inflammatory properties, neuroprotective abilities, immunomodulatory effects, antinociceptive effects, and regulation of blood glucose. The aim of this study was to investigate the effects of EB on the barrier function in the intestinal porcine epithelial cells J2 (IPEC-J2). The IPEC-J2 cells were inoculated into 96-well plates at a density of 5 × 103 cells per well for 100% confluence. The cells were cultured in the presence of EB at concentrations of 0, 0.05, 0.10, and 0.20 mg/ml for 48 hr. Then, 0.10 mg/ml was selected as the suitable concentration for the estimation of transepithelial electric resistance (TEER) value, alkaline phosphatase activity, proinflammatory cytokines mRNA expression, tight junction mRNA and protein expression. The results of this study indicated that the supplementation of EB in IPEC-J2 cells decreased cellular membrane permeability and mRNA expression of proinflammatory cytokines, including interleukin-6 (IL-6), interferon-γ (INF-γ), and tumour necrosis factor-α (TNF-α). The supplementation of EB in IPEC-J2 cells increased tight junction protein expression and anti-inflammatory cytokines, interleukin 10 (IL-10) and transforming growth factor beta (TGF-β). In addition, the western blotting and real-time quantitative polymerase chain reaction (RT-qPCR) results indicated that EB significantly (p < 0.05) increased the mRNA and protein expression of intestinal tight junction proteins, Claudin-3, Occludin, and Zonula Occludins protein-1 (ZO-1). Therefore, dietary supplementation of EB may increase intestinal barrier function, tight junction protein expression, anti-inflammatory cytokines, and decrease proinflammatory cytokines synthesis in IPEC-J2 cells.
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