Project description:Intervention group:High flavonoid content fruit and vegetable diet guidance;Control group:No
Primary outcome(s): Flavonoid markers;Salivary cortisol;Blood cortisol;Gut microbiota;Mental Health Assessment Questionnaire;Fecal short chain fatty acids;Changes in defecation habits and traits
Study Design: Parallel
Project description:LCMS data from 3NPH derivatized fecal extracts of gnotobiotic mice, generated for interlaboratory comparison of a targeted method for short chain fatty acids and organic acids quantitation.
Project description:This study looks at the gene expression of two chain-elongating bacteria, Pseudoramibacter alactolyticus and Megasphaera elsdenii, in monoculture and in coculture with anaerobic gut fungi (Neocallimastix lanati). P. alactolyticus in particular has appeared stable in synthetic cocultures with anaerobic fungi based on metabolic output, and this RNA-seq study was designed to further assess that stability. Additionally, chain-elongating bacteria can use fungal fermentation products to generate short- and medium-chain fatty acids, and this study was employed to see how genes involved in this process (reverse beta oxidation) were regulated in coculture compared to monoculture.
Project description:Alterations in intestinal microbiota and intestinal short chain fatty acids profiles have been associated with the pathophysiology of obesity and insulin resistance. Whether intestinal microbiota dysbiosis is a causative factor in humans remains to be clarified We examined the effect of fecal microbial infusion from lean donors on the intestinal microbiota composition, glucose metabolism and small intestinal gene expression. Male subjects with metabolic syndrome underwent bowel lavage and were randomised to allogenic (from male lean donors with BMI<23 kg/m2, n=9) or autologous (reinfusion of own feces, n=9) fecal microbial transplant. Insulin sensitivity and fecal short chain fatty acid harvest were measured at baseline and 6 weeks after infusion. Intestinal microbiota composition was determined in fecal samples and jejunal mucosal biopsies were also analyzed for the host transcriptional response. Insulin sensitivity significantly improved six weeks after allogenic fecal microbial infusion (median Rd: from 26.2 to 45.3 μmol/kg.min, p<0.05). Allogenic fecal microbial infusion increased the overall amount of intestinal butyrate producing microbiota and enhanced fecal harvest of butyrate. Moreover, the transcriptome analysis of jejunal mucosal samples revealed an increased expression of genes involved in a G-protein receptor signalling cascade and subsequently in glucose homeostasis. Lean donor microbial infusion improves insulin sensitivity and levels of butyrate-producing and other intestinal microbiota in subjects with the metabolic syndrome. We propose a model wherein these bacteria provide an attractive therapeutic target for insulin resistance in humans. (Netherlands Trial Register NTR1776).
Project description:This transcriptomic study investigates the effect of therapeutic short-chain fatty acids (SCFA) administration on post-stroke recovery.