Meta-omics in sDMDMm
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB33264 | ENA |
REPOSITORIES: ENA
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Project description:To characterize the effect of microbiota on global gene expression in the distal small intestine during postnatal gut development we employed mouse models with experimental colonization by intestinal microbiota. Using microarray analysis to assess global gene expression in ileal mucosa at the critical stage of intestinal development /maturation associated with weaning, and asking how expression is affected by microbial colonization In the study presented here, preweaned and postweaned GF, SPF mouse small intestinal total RNAs were used. Also, 3-week-old gnotobiotic mouse as well as GF mouse small intestinal RNAs were used.
2013-03-02 | E-GEOD-44788 | biostudies-arrayexpress
Project description:The intestinal microbiota influences the development of a normal intestinal physiology, education and functioning of the mucosal immune system. The goal of this study is to analyze how the transcriptional profile of the colonic endothelial cells is influence by colonization of gnotobiotic mice with specific bacterial strains . The goal of this study is to analyze how the transcriptional profile of the colonic endothelial cells is influence by colonization of gnotobiotic mice with specific bacterial strains .
2022-10-05 | GSE180907 | GEO
Project description:Microbiota functional activity biosensors in gnotobiotic mice
2020-04-27 | MSV000085341 | MassIVE
Project description:Gut dysbiosis is closely involved in the pathogenesis of inflammatory bowel disease (IBD). However, it remains unclear whether IBD-associated gut dysbiosis plays a primary role in disease manifestation or is merely secondary to intestinal inflammation. Here, we established a humanized gnotobiotic (hGB) mouse system to assess the functional role of gut dysbiosis associated with two types of IBD - Crohn's disease (CD) and ulcerative colitis (UC). In order to explore the functional impact of dysbiotic microbiota in IBD patients on host immune responses, we analyzed gene expression profiles in colonic mucosa of hGB mice colonized with healty (HC), CD, and UC microbiota.
2015-10-10 | GSE73882 | GEO
Project description:The intestinal microbiota fundamentally influences the development of a normal intestinal physiology and education and functioning of the mucosal immune system. The goal of this study is to analyze how the transcriptional profile of the murine colon can be influence by colonization of gnotobiotic mice with specific bacterial strains .
2021-08-09 | GSE181502 | GEO
Project description:Commensal microbiota contribute to gut homeostasis and influence gene expression. Intestinal organoid culture closely represent intestinal epithelium and retain intestinal stem cells and dynamic recovery capabilities as well as all major cell types of the intestinal epithelium. We established organoid culture using colon crypts isolated from germ-free (GF), and gnotobiotic mice monocolonized either with the E.coli strain O6K13 (O) or Nissle 1917 strain (N). The expression profiles of these organoids were compared to the organoid culture isolated from conventionally reared (CR) mice in order to disclose genes differentially expressed in response to the change in the intestinal microflora composition.
2019-09-13 | E-MTAB-7723 | biostudies-arrayexpress
Project description:Inappropriate cross talk between mammals and their gut microbiota may trigger intestinal inflammation and drive extra-intestinal immune-mediated diseases. Studies with germ-free or gnotobiotic animals represent the gold standard for research on bacterial-host interaction but they are not readily accessible to the wide scientific community. We aimed at refining a protocol that in a robust manner would deplete murine intestinal microbiota and prove to have significant biologic validity. Previously published protocols for depleting mice of their intestinal microbiota by administering broad-spectrum antibiotics in drinking water were difficult to reproduce. We show that twice daily delivery of antibiotics by gavage depleted mice of their cultivable fecal microbiota and reduced the fecal bacterial DNA load by approximately 400 fold while ensuring the animals’ health. Mice subjected to the protocol for 17 days displayed enlarged ceca, reduced Peyer’s patches and small spleens. Antibiotic treatment significantly reduced the expression of antimicrobial factors and altered the expression of 517 genes in total in the colonic epithelium. Genes involved in cell cycle were significantly altered concomitant with reduced epithelial proliferative activity in situ assessed by Ki-67 expression, suggesting that commensal microbiota drives cellular proliferation in colonic epithelium. We present a robust protocol for depleting mice of their cultivatable intestinal microbiota with antibiotics by gavage and show that the biological effect of this depletion is phenotypic characteristics and epithelial gene expression profile similar to those of germ-free mice. Comparison of genome-wide gene expression of colon intestinal epithelial cells from mice subjected to microbiota depletion protocol against to control mice.
2011-08-14 | E-GEOD-22648 | biostudies-arrayexpress
Project description:Intestinal microbial dysbiosis is associated with Crohn’s disease (CD). However, the mechanisms leading to the chronic mucosal inflammation that characterizes this disease remain unclear. To evaluate causality and mechanisms of disease, we conducted a systems level study of the interactions between the gut microbiota and host in new-onset pediatric patients. We report an altered host proteome in CD patients indicative of impaired mitochondrial functions. A downregulation of mitochondrial proteins implicated in H2S detoxification was observed, while the relative abundance of H2S microbial producers was increased. Network correlation analysis identified Atopobium parvulum as the central hub of H2S producers. Gnotobiotic and conventionalized colitis-susceptible interleukin-10-deficient (Il10-/-) mice demonstrated that A. parvulum induced colitis, a phenotype requiring the presence of the intestinal microbiota. Administration of bismuth, a H2S scavenger, prevented A. parvulum-induced colitis in Il10-/- mice. This study identified host-microbiota interactions that are disturbed in CD patients providing mechanistic insights on CD pathogenesis.
2016-09-29 | PXD002882 | Pride
Project description:Gut-brain connections monitor the intestinal tissue and its microbial and dietary content1, regulating both intestinal physiological functions such as nutrient absorption and motility2,3, and brain–wired feeding behaviour2. It is therefore plausible that circuits exist to detect gut microbes and relay this information to central nervous system (CNS) areas that, in turn, regulate gut physiology4. We characterized the influence of the microbiota on enteric–associated neurons (EAN) by combining gnotobiotic mouse models with transcriptomics, circuit–tracing methods, and functional manipulation. We found that the gut microbiome modulates gut–extrinsic sympathetic neurons; while microbiota depletion led to increased cFos expression, colonization of germ-free mice with short-chain fatty acid–producing bacteria suppressed cFos expression in the gut sympathetic ganglia. Chemogenetic manipulations, translational profiling, and anterograde tracing identified a subset of distal intestine-projecting vagal neurons positioned to play an afferent role in microbiota–mediated modulation of gut sympathetic neurons. Retrograde polysynaptic neuronal tracing from the intestinal wall identified brainstem sensory nuclei activated during microbial depletion, as well as efferent sympathetic premotor glutamatergic neurons that regulate gastrointestinal transit. These results reveal microbiota–dependent control of gut extrinsic sympathetic activation through a gut-brain circuit.
2020-03-20 | GSE145986 | GEO
Project description:Commensal microbiota contribute to gut homeostasis and influence mucosal gene expression. We harvested mucosal lining of middle and distal part of the small intestine and colon from germ-free (GF) and gnotobiotic mice monocolonized either with the E.coli strain O6K13 (O) or Nissle 1917 strain (N). The expression profiles of the mucosa samples were compared to the corresponding tissue isolated from conventionally reared mice in order to disclose genes differentially expressed in response to the change in the intestinal microflora composition.
2019-09-13 | E-MTAB-7726 | biostudies-arrayexpress