Dietary emodin alleviates lipopolysaccharide-induced intestinal mucosal barrier injury by regulating gut microbiota in piglets  

作　　者：Wenjuan Xun Mengyao Ji Zhonghua Ma Tanjie Deng Wen Yang Guanyu Hou Liguang Shi Ting Cao 

机构地区：[1]College of Animal Science and Technology,Hainan University,Haikou,570228,China [2]Tropical Crops Genetic Resources Institute,Chinese Academy of Tropical Agricultural Sciences,Haikou,571100,China

出　　处：《Animal Nutrition》2023年第3期152-162,共11页动物营养（英文版）

基　　金：supported by the Hainan Association’s Innovation Project for Science and Technology Young Talents(QCXM201907);the Scientific Research Foundation for Hainan University(KYQD(ZR)20037);the Innovative Research Projects for Graduate Students in Hainan Province(Qhys2021-163)。

摘　　要：This study was to determine the effects of dietary emodin(ED)on the intestinal mucosal barrier,nuclear factor kappa-B(NF-κB)pathways,and gut microbial flora in lipopolysaccharide(LPS)-induced piglets.Twenty-four weaned piglets were chosen and 4 treatments were created by randomly distributing piglets into CON,ED,LPS,and ED_LPS groups.Experiments were done in a 2×2 factorial arrangement and maintained for 21 d.Dietary treatment(a basal diet or 300 mg/kg ED)and immunological challenge(LPS or sterile saline)were 2 major factors.Intraperitoneal injections of LPS or sterilized saline were given to piglets on d 21.Six hours after the LPS challenge,all piglets were euthanized for sample collection and analysis.The results showed that piglets of the ED_LPS group had higher(P<0.05)villus height to crypt depth ratio(VCR),and lower(P<0.05)plasma D-lactate and diamine oxidase(DAO)than the LPS group.Furthermore,ED inhibited(P<0.05)the decrease of glutathione peroxidase(GSH-Px)and catalase(CAT)activities and increase of malonaldehyde level(P<0.05)in jejunal mucosa induced by LPS.The mRNA levels of pro-inflammatory cytokine genes(IL-6,IL-1β,and TNF-a)were significantly reduced(P<0.05),and the mRNA levels of antioxidant enzyme genes(GPX-1,SOD2 and CAT),as well as protein and mRNA levels of tight junction proteins(occludin,claudin-1,and ZO-1),were also significantly increased(P<0.05)by ED addition in LPS-induced piglets.Meanwhile,ED supplementation significantly decreased the LPS-induced protein levels of cyclooxygenase-2 and phosphorylation levels of NF-κB p65and IκBa in jejunal mucosa.Emodin had a significant effect on the composition of gut microbial flora at various taxonomic positions as indicated by 16S RNA sequencing.The acetic acid,isobutyric acid,valeric acid,and isovaleric acid concentrations in the cecum were also increased by ED addition in pigs(P<0.05).Furthermore,the correlation analysis revealed that some intestinal microbiota had a potential relationship with jejunal VCR,plasma D-lactate and DAO,jejunal mucos

关 键 词：EMODIN PIGLET Intestinal barrier function Nuclear factor kappa-B signalling Gut microbiota Short-chain fatty acid 

分 类 号：R57[医药卫生—消化系统]