Effect of altered gut microbiota on visceral hypersensitivity of postinfectious irritable bowel syndrome mice. Issue 12 (12th September 2022)

• Record Type: Journal Article
• Authors: Cheng, Fangli; Fan, Zhenzhen; Lin, Chenhong; Zhu, Yubin; He, Huiqin; Dai, Ning; Du, Lijun
• Is Part Of: European journal of gastroenterology & hepatology. Volume 34:Issue 12(2022)
• Page Start: 1220
• Page End: 1230
• Publication Date: 2022-09-12
• Subjects: gut microbiota -- 5-hydroxytryptamine -- irritable bowel syndrome -- N-methyl-D-aspartate receptors -- visceral hypersensitivity; Digestive organs -- Diseases -- Periodicals; Liver -- Diseases -- Periodicals; Digestive organs -- Diseases; Liver -- Diseases; Periodicals; 616.33
• DOI: 10.1097/MEG.0000000000002441
• Languages: English
• ISSNs: 0954-691X

Abstract

Abstract : Objective: Irritable bowel syndrome (IBS) is a common functional bowel disorder characterized with visceral hypersensitivity. Previous studies indicated gut microbiota alteration associated short-chain fatty acids (SCFAs) dysregulation is associated with IBS development. The aim of the study is to explore the potential role of microbiota dysbiosis mediated visceral hypersensitivity in postinfectious-IBS (PI-IBS) mouse model. Methods: Four-week-old NIH mice were randomly allocated into four groups: control mice, PI-IBS mice, PI-IBS mice co-housing with normal mice, and PI-IBS mice were administrated with a cocktail of antibiotics. Trichinella spiralis infection established PI-IBS mouse model. Microbiota in cecal contents and feces were analyzed by 16S rDNA sequencing. SCFAs were detected by gas chromatography. 5-hydroxytryptamine (5-HT) was evaluated by ELISA, and N-methyl-D-aspartate receptors (NMDARs) were examined by western blot. Visceral sensitivity was determined by abdominal withdrawal reflex in response to colorectal distention. Results: Increased SCFAs were observed in cecal contents and feces in PI-IBS mice accompanied with higher 5-HT and NMDAR subunits expressions in ileum and colon. Visceral hypersensitivity was observed in PI-IBS mice compared to control mice. When administrated with antibiotics cocktails and co-housing with normal mice, PI-IBS mice showed decreased SCFAs, 5-HT, NMDAR subunits expressions, and improved visceral hypersensitivity. Conclusion: Gut microbiota alteration induced increased SCFAs, 5-HT and NMDAR subunits expressions were associated with visceral hypersensitivity in PI-IBS mice. The critical role of gut microbiota in improving visceral hypersensitivity was further identified by treatment of antibiotics cocktail and co-housing.