scholarly journals Antibiotics suppress colon tumorigenesis through inhibition of aberrantDNAmethylation in an azoxymethane and dextran sulfate sodium colitis model

2018 ◽  
Author(s):  
Naoko Hattori ◽  
Tohru Niwa ◽  
Tatsuya Ishida ◽  
Kyosuke Kobayashi ◽  
Toshio Imai ◽  
...  
Keyword(s):  
Dextran Sulfate ◽  
Dextran Sulfate Sodium ◽  
Colon Tumorigenesis ◽  
Colitis Model

scholarly journals Acetylcholine-producing T cells augment innate immune-driven colitis but are redundant in T cell-driven colitis

2019 ◽  
Vol 317 (5) ◽  
pp. G557-G568 ◽  
Author(s):  
Rose A. Willemze ◽  
David J. Brinkman ◽  
Olaf Welting ◽  
Patricia H. P. van Hamersveld ◽  
Caroline Verseijden ◽  
...  
Keyword(s):  
Immune Response ◽  
T Cells ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Inflammatory Cytokine ◽  
Dextran Sulfate ◽  
Dextran Sulfate Sodium ◽  
Innate Immune ◽  
Cytokine Levels ◽  
Colitis Model

Clinical trials suggest that vagus nerve stimulation presents an alternative approach to classical immune suppression in Crohn's disease. T cells capable of producing acetylcholine (ChAT+ T cells) in the spleen are essential mediators of the anti-inflammatory effect of vagus nerve stimulation. Besides the spleen, ChAT+ T cells are found abundantly in Peyer’s patches of the small intestine. However, the role of ChAT+ T cells in colitis pathogenesis is unknown. Here, we made use of CD4creChATfl/fl mice (CD4ChAT−/− mice) lacking ChAT expression specifically in CD4+ T cells. Littermates (ChATfl/fl mice) served as controls. In acute dextran sulfate sodium (DSS)-induced colitis (7 days of 2% DSS in drinking water), CD4ChAT−/− mice showed attenuated colitis and lower intestinal inflammatory cytokine levels compared with ChATfl/fl mice. In contrast, in a resolution model of DSS-induced colitis (5 days of 2% DSS followed by 7 days without DSS), CD4ChAT−/− mice demonstrated a worsened colitis recovery and augmented colonic histological inflammation scores and inflammatory cytokine levels as compared with ChATfl/fl mice. In a transfer colitis model using CD4+CD45RBhigh T cells, T cells from CD4ChAT−/− mice induced a similar level of colitis compared with ChATfl/fl T cells. Together, our results indicate that ChAT+ T cells aggravate the acute innate immune response upon mucosal barrier disruption in an acute DSS-induced colitis model, whereas they are supporting the later resolution process of this innate immune-driven colitis. Surprisingly, ChAT expression in T cells seems redundant in the context of T cell-driven colitis. NEW & NOTEWORTHY By using different mouse models of experimental colitis, we provide evidence that in dextran sulfate sodium-induced colitis, ChAT+ T cells capable of producing acetylcholine worsen the acute immune response, whereas they support the later healing phase of this innate immune-driven colitis.

scholarly journals 6,7,4′-Trihydroxyflavanone Protects against Dextran Sulfate Sodium-Induced Colitis by Regulating the Activity of T Cells and Colon Cells In Vivo

2021 ◽  
Vol 22 (4) ◽  
pp. 2083
Author(s):  
Hyun-Su Lee ◽  
Gil-Saeng Jeong
Keyword(s):  
T Cells ◽  
Dextran Sulfate ◽  
Dextran Sulfate Sodium ◽  
Cell Activity ◽  
Bioactive Molecules ◽  
Colon Cells ◽  
Colon Cell ◽  
Ht 29 ◽  
Colitis Model

Colitis is a multifactorial disorder that mostly occurs in the gastrointestinal tract. Despite improvements in mucosal inflammation research, little is known regarding the small bioactive molecules that are beneficial for regulating T cells and colon cell activity. 6,7,4′-trihydroxyflavanone (THF) is a flavanone that possesses anti-osteoclastogenesis activity and exerts protective effects against methamphetamine-induced immunotoxicity. Whether THF mitigates intestinal inflammation by regulating T cells and colon cell activity remains unknown. In the present study, Jurkat and HT-29 cells were used for in vitro experiments, and dextran sulfate sodium (DSS)-induced colitis model in mice was used for in vivo experiment. We observed that THF did not have a negative effect on the viability of Jurkat and HT-29 cells. Quantitative PCR and Western blot analysis revealed that THF regulates the activity of Jurkat cells and HT-29 cells via the NFκB and MAPK pathways under stimulated conditions. In the DSS-induced colitis model, oral administration of THF attenuated the manifestations of DSS-induced colitis, including a reduction in body weight, shrinkage of the colon, and enhanced expression of pro-inflammatory cytokines in the colon and mesenteric lymph nodes. These data suggest that THF alleviates DSS-induced colitis by modulating the activity of T cells and colon cells in vivo.

Effects of Lactobacillus gasseri SBT2055 on Dextran Sulfate Sodium-Induced Ulcerative Colitis Model in Rats

2002 ◽  
Vol 21 (3) ◽  
pp. 179-183 ◽  
Author(s):  
Eiichi IMAI ◽  
Kenji FUKUI ◽  
Noriyasu OHTA ◽  
Toshie TOMITSUKA ◽  
Yasuyuki SETO ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Dextran Sulfate ◽  
Dextran Sulfate Sodium ◽  
Lactobacillus Gasseri ◽  
Colitis Model

scholarly journals The effect of selected Lactobacillus strains on dextran sulfate sodium-induced mouse colitis model

2020 ◽  
Author(s):  
Meysam Hasannejad-Bibalan ◽  
Ali Mojtahedi ◽  
Morteza Eshaghi ◽  
Mahdi Rohani ◽  
Mohammad Reza Pourshafie ◽  
...  
Keyword(s):  
Histological Analysis ◽  
Dextran Sulfate ◽  
Dextran Sulfate Sodium ◽  
Activity Index ◽  
Lactobacillus Rhamnosus ◽  
Disease Activity Index ◽  
Therapeutic Effects ◽  
Probiotic Properties ◽  
Markers Of Inflammation ◽  
Colitis Model

AbstractInflammatory bowel disease (IBD) comprises two major illnesses: Crohn's disease (CD) and ulcerative colitis (UC). Dextran sulfate sodium (DSS) mouse colitis model has been used in understanding the mechanism of IBD. This study was conducted to examine selected Lactobacillus spp. as potential IBD treatment in the DSS-induced animal model. Balb/c mice were used and colitis was induced by adding 5% dextran sodium sulfate into the drinking water for 8 days. Colon length, disease activity index (DAI) and histological analysis were measured as markers of inflammation in DSS colitis mice. The majority of the Lactobacillus species significantly prevented the shortening of the colon length compared with the DSS group. The DAI scores of mice were significantly reduced following usage of four Lactobacillus strains included: Lactobacillus plantarum 03 and 06, Lactobacillus brevis 02 and Lactobacillus rhamnosus 01. The histological analysis exhibited that oral administration of Lactobacillus strains had therapeutic effects on mice colitis. L. plantarum and L. brevis showed better therapeutic effect against DSS-induced acute colitis mice. The probiotic activities of these three isolates indicated that the probiotic effects were strain specific and none of these useful bacteria could exhibit all of the valued probiotic properties simultaneously.

scholarly journals Effect of vitexin on alleviating liver inflammation in a dextran sulfate sodium (DSS)-induced colitis model

2020 ◽  
Vol 121 ◽  
pp. 109683 ◽  
Author(s):  
Shuni Duan ◽  
Xianhua Du ◽  
Shuxian Chen ◽  
Jian Liang ◽  
Song Huang ◽  
...  
Keyword(s):  
Dextran Sulfate ◽  
Dextran Sulfate Sodium ◽  
Liver Inflammation ◽  
Colitis Model

scholarly journals Molecular and Microbial Signatures Predictive of Prebiotic Action of Neoagarotetraose in a Dextran Sulfate Sodium-Induced Murine Colitis Model

2020 ◽  
Vol 8 (7) ◽  
pp. 995
Author(s):  
Fang Liu ◽  
Jianan Liu ◽  
Thomas T.Y. Wang ◽  
Zhen Liu ◽  
Changhu Xue ◽  
...  
Keyword(s):  
Gut Microbiome ◽  
Dextran Sulfate ◽  
Dextran Sulfate Sodium ◽  
Intestinal Inflammation ◽  
16S Rrna Gene Sequencing ◽  
Rrna Gene ◽  
Murine Colitis ◽  
Bioactive Properties ◽  
Rrna Gene Sequencing ◽  
Colitis Model

Neoagarotetraose (NT), a hydrolytic product of agar by β-agarase, is known to possess bioactive properties. However, the mechanisms via which NT alleviates intestinal inflammation remain unknown. In this study, a dextran sulfate sodium (DSS)-induced murine model was developed to evaluate the effect of NT on gut microbiome and microbial metabolism using 16S rRNA gene sequencing and untargeted metabolomics. Our data demonstrate that NT ingestion improved gut integrity and inflammation scores. NT reversed the abundance of Proteobacteria from an elevated level induced by DSS and significantly increased the abundance of Verrucomicrobia. Further, NT significantly increased the abundance of Akkermansia and Lactobacillus and concomitantly decreased that of Sutterella, which were among the important features identified by random forests analysis contributing to classification accuracy for NT supplementation. A microbial signature consisting of Adlercreutzia (denominator) and Turicibacter (numerator) predicted the NT supplementation status. Moreover, NT significantly modulated multiple gut metabolites, particularly those related to histidine, polyamine and tocopherol metabolism. Together, our findings provided novel insights into the mechanisms by which NT modulated the gut microbiome and metabolome and should facilitate the development of NT as a potent prebiotic for colitis management.

The ameliorative effect of a Lactobacillus strain with good adhesion ability against dextran sulfate sodium-induced murine colitis

2019 ◽  
Vol 10 (1) ◽  
pp. 397-409 ◽  
Author(s):  
Guangqiang Wang ◽  
Yingnan Liu ◽  
Zhi Lu ◽  
Yiting Yang ◽  
Yongjun Xia ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Dextran Sulfate ◽  
Dextran Sulfate Sodium ◽  
Good Adhesion ◽  
Disease Symptoms ◽  
Murine Colitis ◽  
Adhesion Ability ◽  
Ameliorative Effect ◽  
Excellent Adhesion ◽  
Colitis Model

The objective of this study was to effectively screen out a Lactobacillus strain with excellent adhesion ability and ameliorative effect on the disease symptoms of a murine ulcerative colitis model.

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