封堵器
结肠炎
肠道通透性
肠道菌群
电针
MAPK/ERK通路
炎症性肠病
紧密连接
内科学
肠粘膜
信号转导
免疫学
医学
生物
细胞生物学
病理
替代医学
疾病
针灸科
作者
Lingli Wang,Jing An,Shuangning Song,Minhui Mei,Wenhua Li,Fei Ding,Shi Liu
出处
期刊:Life Sciences
[Elsevier]
日期:2020-09-21
卷期号:261: 118473-118473
被引量:44
标识
DOI:10.1016/j.lfs.2020.118473
摘要
Electroacupuncture (EA) at ST36 has been verified to ameliorate experimental acute colitis. However, the effect of EA on chronic colitis and its mechanism has not yet been explored. This study aimed to assess the protective effect of EA against chronic colitis and the related mechanisms.Chronic colitis was induced by dextran sulfate sodium (DSS) in C57BL/6 mice, and EA was applied throughout the entire experiment. Colonic inflammation and intestinal barrier integrity were evaluated. Alterations in the gut microbiota were analyzed by 16S rRNA gene sequencing. The fecal microbiota transplantation (FMT) experiment was used to further confirm the effect of the gut microbiota on the barrier protective effect of EA. The potential molecular mechanisms were explored by western blotting.(1) EA lowered the disease activity index (DAI) and histological scores, decreased the levels of TNFα, IL1β, IL6 and iNOS, and increased the IL10 level in DSS-induced chronic colitis. (2) EA upregulated the protein expression of ZO-1, Occludin, E-Cadherin and mucin2 (MUC2), reduced the apoptosis and proliferation of intestinal epithelial cells (IECs) and intestinal permeability. (3) EA enhanced the gut microbiota diversity and restored the community structure. (4) Both the low-frequency EA (LEA) FMT and high-frequency EA (HEA) FMT maintained the intestinal barrier integrity. (5) EA promoted activation of the mitogen activated protein kinase (MAPK) signaling pathway.EA can relieve chronic experimental colitis, and this effect may depend on activation of the MAPK signaling pathway through modulation of the gut microbiota to preserve the intestinal barrier.
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