Lactobacillus salivarius WZ1 Inhibits the Inflammatory Injury of Mouse Jejunum Caused by Enterotoxigenic Escherichia coli K88 by Regulating the TLR4/NF-κB/MyD88 Inflammatory Pathway and Gut Microbiota

被引:7
作者
Wei, Zhen [1 ]
He, Ziqi [1 ]
Wang, Tongyao [1 ]
Wang, Xiaoxuan [1 ]
Wang, Tiancheng [1 ]
Long, Miao [1 ]
机构
[1] Shenyang Agr Univ, Coll Anim Sci & Vet Med, Key Lab Livestock Infect Dis, Minist Educ, Shenyang 110866, Peoples R China
基金
中国国家自然科学基金;
关键词
Lactobacillus salivarius; ETEC K88; gut microbiota; mice; inflammatory injury; TLR4/NF-kappa B/MyD88; INTESTINAL EPITHELIAL BARRIER; IN-VITRO; MECHANISM; STRAINS; DIARRHEA; INCREASE; CELLS; PATHOPHYSIOLOGY; BACTERIOCIN; MODULATION;
D O I
10.3390/microorganisms11030657
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Replacing antibiotics with probiotics has become an important way to safely and effectively prevent and treat some gastrointestinal diseases. This study was conducted to investigate whether Lactobacillus salivarius WZ1 (L.S) could reduce the inflammatory injury to the mouse jejunum induced by Escherichia coli (ETEC) K88. Forty Kunming mice were randomly divided into four groups with 10 mice in each group. From day 1 to day 14, the control group and the E. coli group were administered with normal saline each day, while the L.S group and the L.S + E. coli group were gavaged with Lactobacillus salivarius WZ1 1 x 10(8) CFU/mL each day. On the 15th day, the E. coli group and the L.S + E. coli group were intragastrically administered ETEC K88 1 x 10(9) CFU/mL and sacrificed 24 h later. Our results show that pretreatment with Lactobacillus salivarius WZ1 can dramatically protect the jejunum morphological structure from the changes caused by ETEC K88 and relieve the morphological lesions of the jejunum, inhibiting changes in the mRNA expressions of TNF-alpha, IL-1 beta and IL-6 and the protein expressions of TLR4, NF-kappa B and MyD88 in the intestinal tissue of mice caused by ETEC K88. Moreover, pretreatment with Lactobacillus salivarius WZ1 also increased the relative abundance of beneficial genera such as Lactobacillus and Bifidobacterium and decreased the abundance of harmful genera such as Ralstonia and Helicobacter in the gut. These results demonstrate that Lactobacillus salivarius WZ1 can inhibit the inflammatory damage caused by ETEC K88 in mouse jejunum by regulating the TLR4/NF-kappa B/MyD88 inflammatory pathway and gut microbiota.
引用
收藏
页数:18
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