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Project description:Ulcerative colitis (UC) develops through a complicated interaction between the host and microbiota. Intestinal fibroblasts are suggested to play crucial roles in the pathogenesis of UC. However, the influences of the host-microbiota interaction on the pathophysiology of intestinal fibroblasts remain poorly understood. Here, we reveal that OTUD3 suppresses pathologic activation of fibroblasts exposed to microbial cyclic GMP-AMP (3’3’-cGAMP) by deubiquitinating stimulator of interferon genes (STING) in the colon. Sting deficiency ameliorated dextran sodium sulfate-induced colitis in Otud3-/- mice. In addition, mice harboring an UC risk missense variant in the Otud3 gene showed pathological features of UC in the colon after transplantation of a fecal microbiome with the potential to produce excessive cGAMP from UC patients. Collectively, these results demonstrate the critical role of OTUD3 in the maintenance of intestinal homeostasis and highlight one mechanism of the interaction between the host (OTUD3 in fibroblasts) and microbiota (STING agonist) in UC development.
2025-05-12 | GSE244080 | GEO
Project description:Ulcerative colitis (UC) develops through a complicated interaction between the host and microbiota. Intestinal fibroblasts are suggested to play crucial roles in the pathogenesis of UC. However, the influences of the host-microbiota interaction on the pathophysiology of intestinal fibroblasts remain poorly understood. Here, we reveal that OTUD3 suppresses pathologic activation of fibroblasts exposed to microbial cyclic GMP-AMP (3’3’-cGAMP) by deubiquitinating stimulator of interferon genes (STING) in the colon. Sting deficiency ameliorated dextran sodium sulfate-induced colitis in Otud3-/- mice. In addition, mice harboring an UC risk missense variant in the Otud3 gene showed pathological features of UC in the colon after transplantation of a fecal microbiome with the potential to produce excessive cGAMP from UC patients. Collectively, these results demonstrate the critical role of OTUD3 in the maintenance of intestinal homeostasis and highlight one mechanism of the interaction between the host (OTUD3 in fibroblasts) and microbiota (STING agonist) in UC development.
2025-05-12 | GSE244079 | GEO
Project description:Ulcerative colitis (UC) develops through a complicated interaction between the host and microbiota. Intestinal fibroblasts are suggested to play crucial roles in the pathogenesis of UC. However, the influences of the host-microbiota interaction on the pathophysiology of intestinal fibroblasts remain poorly understood. Here, we reveal that OTUD3 suppresses pathologic activation of fibroblasts exposed to microbial cyclic GMP-AMP (3’3’-cGAMP) by deubiquitinating stimulator of interferon genes (STING) in the colon. Sting deficiency ameliorated dextran sodium sulfate-induced colitis in Otud3-/- mice. In addition, mice harboring an UC risk missense variant in the Otud3 gene showed pathological features of UC in the colon after transplantation of a fecal microbiome with the potential to produce excessive cGAMP from UC patients. Collectively, these results demonstrate the critical role of OTUD3 in the maintenance of intestinal homeostasis and highlight one mechanism of the interaction between the host (OTUD3 in fibroblasts) and microbiota (STING agonist) in UC development.
2025-05-12 | GSE244078 | GEO
Project description:Ulcerative colitis (UC) develops through a complicated interaction between the host and microbiota. Intestinal fibroblasts are suggested to play crucial roles in the pathogenesis of UC. However, the influences of the host-microbiota interaction on the pathophysiology of intestinal fibroblasts remain poorly understood. Here, we reveal that OTUD3 suppresses pathologic activation of fibroblasts exposed to microbial cyclic GMP-AMP (3’3’-cGAMP) by deubiquitinating stimulator of interferon genes (STING) in the colon. Sting deficiency ameliorated dextran sodium sulfate-induced colitis in Otud3-/- mice. In addition, mice harboring an UC risk missense variant in the Otud3 gene showed pathological features of UC in the colon after transplantation of a fecal microbiome with the potential to produce excessive cGAMP from UC patients. Collectively, these results demonstrate the critical role of OTUD3 in the maintenance of intestinal homeostasis and highlight one mechanism of the interaction between the host (OTUD3 in fibroblasts) and microbiota (STING agonist) in UC development.
2025-05-12 | GSE244077 | GEO
Project description:Ulcerative colitis (UC) develops through a complicated interaction between the host and microbiota. Intestinal fibroblasts are suggested to play crucial roles in the pathogenesis of UC. However, the influences of the host-microbiota interaction on the pathophysiology of intestinal fibroblasts remain poorly understood. Here, we reveal that OTUD3 suppresses pathologic activation of fibroblasts exposed to microbial cyclic GMP-AMP (3’3’-cGAMP) by deubiquitinating stimulator of interferon genes (STING) in the colon. Sting deficiency ameliorated dextran sodium sulfate-induced colitis in Otud3-/- mice. In addition, mice harboring an UC risk missense variant in the Otud3 gene showed pathological features of UC in the colon after transplantation of a fecal microbiome with the potential to produce excessive cGAMP from UC patients. Collectively, these results demonstrate the critical role of OTUD3 in the maintenance of intestinal homeostasis and highlight one mechanism of the interaction between the host (OTUD3 in fibroblasts) and microbiota (STING agonist) in UC development.
2025-05-12 | GSE244076 | GEO
Project description:OTUD3 prevents ulcerative colitis by modulating microbiota-mediated STING activation.
| PRJNA1021199 | ENA
Project description:This SuperSeries is composed of the SubSeries listed below.
2024-05-31 | GSE216435 | GEO
Project description:Ulcerative colitis (UC) is a chronic recurrent inflammatory disease of the gastrointestinal tract. Recent studies demonstrate that the phenolic tannin paeonol (Pae) attenuates UC in mouse models by downregulating inflammatory factors. However, its molecular mechanism for UC treatment has not been explored from the perspective of the gut microbiota and metabolomics. In this study, we investigated the effects of Pae on colonic inflammation, intestinal microbiota and fecal metabolites in 3% dextran sodium sulfate (DSS) induced BALB/c UC mice. Pae significantly improved the clinical index, relieved colonic damage, reduced cytokine levels, and restored the integrity of the intestinal epithelial barrier in UC mice. In addition, Pae increased the abundance of gut microbiota, partially reversed the disturbance of intestinal biota composition, including Lactobacillus and Bacteroides, and regulated metabolite levels, such as bile acid (BA) and short-chain fatty acid (SCFA). In conclusion, our study provides new insight on Pae remission of UC.
| S-EPMC9612301 | biostudies-literature
Project description:Background/objectivesUlcerative colitis (UC) is a chronic and easily recurrent inflammatory bowel disease. The gut microbiota and plasma metabolites play pivotal roles in the development and progression of UC. Therefore, therapeutic strategies targeting the intestinal flora or plasma metabolites offer promising avenues for the treatment of UC. Luteolin (Lut), originating from a variety of vegetables and fruits, has attracted attention for its potent anti-inflammatory properties and potential to modulate intestinal flora.MethodsThe therapeutic efficacy of Lut was evaluated in an established dextran sodium sulfate (DSS)-induced colitis mice model. The clinical symptoms were analyzed, and biological samples were collected for microscopic examination and the evaluation of the epithelial barrier function, microbiome, and metabolomics.ResultsThe findings revealed that Lut administration at a dose of 25 mg/kg significantly ameliorated systemic UC symptoms in mice, effectively reduced the systemic inflammatory response, and significantly repaired colonic barrier function. Furthermore, Lut supplementation mitigated gut microbiota dysbiosis in a UC murine model, increasing the abundance of Muribaculaceae, Rikenella, and Prevotellaceae while decreasing Escherichia_Shigella and Bacteroides levels. These alterations in gut microbiota also influenced plasma metabolism, significantly increasing phosphatidylcholine (PC), 6'-Deamino- 6'-hydroxyneomycin C, and gamma-L-glutamyl-butyrosine B levels and decreasing Motapizone and Arachidoyl-Ethanolamide (AEA) levels.ConclusionsThis study reveals that Lut supplementation modulates intestinal inflammation by restoring the gut microbiota community structure, thereby altering the synthesis of inflammation-related metabolites. Lut is a potential nutritional supplement with anti-inflammatory properties and offers a novel alternative for UC intervention and mitigation. In addition, further studies are needed to ascertain whether specific microbial communities or metabolites can mediate the recovery from UC.
| S-EPMC11768085 | biostudies-literature
Project description:Ulcerative colitis (UC) is a chronic and recurrent inflammatory disorder in the gastrointestinal tract. Here, we examined the pharmacological effects of ginsenoside Rg1, a natural compound with low bioavailability, on the acute experimental colitis mice induced by dextran sulfate sodium (DSS) and explored underlying mechanisms. Acute UC was induced in C57BL/6 mice by 2.5% DSS for 7 days, meanwhile, 2 mg/10 g b.w. ginsenoside Rg1 was administrated to treat the mice. Body weight, colon length, colon tissue pathology, and colon tissue inflammatory cytokines were assessed. The composition structure of gut microbiota was profiled using 16s rRNA sequencing. Global metabolomic profiling of the feces was performed, and tryptophan and its metabolites in the serum were detected. The results showed that Rg1 significantly ameliorated DSS-induced colonic injury and colonic inflammation. In addition, Rg1 also partly reversed the imbalance of gut microbiota composition caused by DSS. Rg1 intervention can regulate various metabolic pathways of gut microbiota such as valine, leucine, and isoleucine biosynthesis and vitamin B6 metabolism and the most prominent metabolic alteration was tryptophan metabolism. DSS decreased the levels of tryptophan metabolites in the serum, including indole-3-carboxaldehyde, indole-3-lactic acid, 3-indolepropionic acid, and niacinamide and Rg1 can increase the levels of these metabolites. In conclusion, the study discovered that Rg1 can protect the intestinal barrier and alleviate colon inflammation in UC mice, and the underlying mechanism is closely related to the regulation of gut microbiota composition and microbial tryptophan metabolism.
| S-EPMC9152015 | biostudies-literature