Project description:Untargeted LC-MS/MS data for fecal samples taken from four different groups of mice: normal chow, BSH+; normal chow, BSH-; high-fat diet, BSH+; high-fat diet, BSH- with matched vehicle control groups.
Project description:ApoE knockout mice were either exposed to hypoxia, or hypercapnia, or both or kept in room air (controls) and fecal samples were collected longitudinally. Impact of treatments were studied using non-targeted LC-MS/MS data
| MSV000082973 | GNPS
Project description:16S rRNA of fecal samples of three groups mice
Project description:ApoE knockout mice were exposed to intermittent hypoxia and hypercapnia (treatment) or room air (controls). Perturbations in the gut microbiome were profiled longitudinally using LC-MS/MS to study the impact of treatment on the gut metabolome over the course of the day. Samples were collected after 6 days of exposure to conditions. Samples were collected every 4 hours for 24hrs (6 timepoints) to examine circadian rhythm dynamics.
2020-01-27 | MSV000084847 | MassIVE
Project description:Fecal microflora sequencing of DSS induced colitis mice in different groups
Project description:Bacteroides, that expresses bile salt hydrolase (BSH), is considered as a potential drug target for metabolic diseases. In the present study, BSH-expressing Bacteroides was found to be enriched in two different CRC mouse models and colonization of nonenterotoxigenic Bacteroides species, such as B. fragilis 9343 or B. vulgatus , enhanced CRC growth. Expression of the 9343 bsh gene in B. fragilis 638R, a bsh - lacking strain, enabled more bile acids to escape into the colon and accelerated CRC progression . The presence of BSH activated WNT signaling and upregulated CCL28 expression dependent on b-catenin in colon tumors. The activated b-catenin/CCL28 axis elevated intra-tumororal immunosuppressive CD25+ FOXP3+ T reg cells. Anti-CCL28 antibody reversed microbial BSH amplificationinduced immunosuppression. Inhibition of BSH reduced CRC progression, coincident with suppression of WNT signaling and CCL28 expression. These findings provide a novel insight into the pro-carcinogenetic role of NTBF in CRC and characterize BSH as a potential target for CRC treatment.
Project description:Alterations in the gastrointestinal microbiota have been implicated in obesity in mice and humans, but the conserved microbial functions that influence host energy metabolism and adiposity have not been determined. Here we show that bacterial bile salt hydrolase (BSH) controls a microbe-host dialogue which functionally regulates host lipid metabolism and weight gain. Expression of cloned BSH enzymes in the GI tract of gnotobiotic or conventional mice significantly altered plasma bile acid signatures and regulated transcription of key genes involved in lipid metabolism (PPARgamma angptl4), cholesterol metabolism (abcg5/8), gastrointestinal homeostasis (regIIIgamma) and circadian rhythm (dbp, per1/2) in the liver or small intestine. High-level expression of BSH in conventionally raised mice resulted in significant reduction of host weight-gain, plasma cholesterol and liver triglycerides. We demonstrate that bacterial BSH activity significantly impacts systemic metabolic processes and adiposity in the host, and represents a key mechanistic target for the control of obesity and hypercholesterolaemia. Germ free Swiss Webster mice were monocolonised with EC containing the bacterial gene, Bile salt hydroalse. The treatment groups and relevant controls were; 1. Germ Free(GF) n=4 , 2. GF and EC n=4, 3. GF and EC +BSH1 n=4, 4. GF and EC+ BSH2 n=4, 5. GF re-conventionalised (CONV-D) n= 5. The Ileum and Liver were removed and the RNA extracted (RNAeasy plus universal kit (Qiagen), quantified and Microarrays were carried out using mouse Exon ST1.0 arrays (Affymetrix) by Almac Group, Craigavon, Northern Ireland. Analysis and pathway mapping was carried out by ALMAC and using Subio Platform software (Subio Inc) and Genesis Software.
Project description:Gene expression profile at single cell level of whole lung cells from C57BL/6J mice or global STING knock-out mice (STING-/-), exposed to either room air or chronic hypoxia (4-week 10% oxygen). Study described in manuscript "A non-inteferon role of STING in pulmonary hypertension". We used scRNAseq to analyze the difference in pulmonary cells and different gene expression across populations between wild type and STING-/- underwent pulmonary hypertension induction with chronic hypoxia.
Project description:The aim of this study was to develop a suitable method to preserve fecal samples for metaproteomics analyses when flash-freezing is not an option. Fecal samples were collected from conventional adult C57BL/6 mice and combined into a fecal master mix. The fecal master mix was then split into 48 subsamples that were subjected to different preservation treatments. The following six preservation methods were tested: flash-freezing in liquid nitrogen followed by storage at -80°C, immersion in RNAlater® and storage at room temperature, immersion in RNAlater® and immediate storage at -80°C, immersion in 95% ethanol and storage at room temperature, immersion in a RNAlater-like buffer “NAP buffer” and storage at room temperature, and immersion in an autoclaved RNAlater-like buffer “Autoclaved NAP buffer” and storage at room temperature. Proteins were extracted from the samples after being stored for 1 and 4 weeks. There were 4 replicates per treatment and time-point. Samples were analyzed by LC-MS/MS and the data were analyzed with Proteome Discoverer against a large database of mouse microbiota protein sequences.
2021-11-25 | PXD024115 | Pride
Project description:Metagenomic profiling of fecal microbiota in aging mice across different age groups