肌球蛋白轻链激酶
紧密连接
并行传输
细胞生物学
肠上皮
化学
下调和上调
碳酸钙-2
磷酸化
信号转导
肠粘膜
肿瘤坏死因子α
NF-κB
势垒函数
上皮
生物
体外
生物化学
内科学
内分泌学
医学
基因
磁导率
遗传学
膜
作者
Juan Wang,Hui Zhao,Ke Lv,Wei Zhao,Ning Zhang,Fan Yang,Xiang Wen,Xiaohua Jiang,Jingrui Tian,Xinjuan Liu,Chi‐Tang Ho,Shiming Li
标识
DOI:10.1021/acs.jafc.1c00274
摘要
The integrity of the intestinal barrier is critical for homeostasis. In this study, we investigated the protective effect of pterostilbene (PTE) on the intestinal epithelium barrier. In vitro results of transepithelial electrical resistance (TEER) in Caco-2 cells indicated that PTE counteracted tumor necrosis factor α (TNFα)-induced barrier damage. In vivo PTE pretreatment markedly ameliorated intestinal barrier dysfunction induced by dextran sulfate sodium (DSS). Notably, intestinal epithelial tight junction (TJ) molecules were restored by PTE in mice exposed to DSS. The mechanism study revealed that PTE prevented myosin light-chain kinase (MLCK) from driving phosphorylation of MLC (p-MLC), which is crucial for maintaining intestinal TJ stability. Furthermore, PTE blunted translocation of NF-κB subunit p65 into the nucleus to downregulate MLCK expression and then to safeguard TJs and barrier integrity. These findings suggest that PTE protected the intestinal epithelial barrier through the NF-κB- MLCK/p-MLC signal pathway.
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