Project description:Gut microbiota and the circadian clock both regulate metabolism. The circadian clock and associated feeding rhythms were shown to impact on the microbial community. However, to what extent gut microbiota reciprocally affect daily rhythms of gene expression and physiology in the host remains elusive. Here, we analyzed the transcriptomes of male and female germ-free mice. While this revealed subtle changes in circadian clock gene expression in liver, intestine, and white adipose tissue, germ-free mice showed considerably altered expression of genes associated to rhythmic physiology. Strikingly, absence of microbiome severely compromised liver sex-dimorphism at the transcriptome and metabolome level. Their sex-specific rhythmicity was strongly attenuated. The resulting feminization of male and masculinization of female hepatic gene expression in germ-free animals is likely caused by altered sex-dimorphism in sex and growth hormone secretion, linked to differential activation of xenobiotic receptors. This defines a novel mechanism by which the gut microbiome regulates host metabolism.

2018-09-01 | GSE114400 | GEO

Transcriptional profiling of 53 tissue samples from germ-free and conventionally raised mice

Project description:Whole-transcriptome survey of gene expression differences between germ-free (GF) and conventionally raised (CONV-R) mice. To assess the role of toll-like receptor signalling, both wild-type and Myd88 -/- mice were used. Three different tissues were harvested from 20 mice (5 WT CONV-R, 5 Myd88 -/- CONV-R, 4 WT GF, 6 Myd88 -/- GF) and expression profiles were determines using the Affymetrix Mouse Gene 1.0ST platform.

2014-01-31 | E-GEOD-31115 | biostudies-arrayexpress

Temporal profile of germ-free and conventionally raised male mice (epididymal white adipose tissue (WAT))

Project description:Temporal profile of germ-free and conventionally raised male mice (epididymal white adipose tissue (WAT))

| PRJNA471296 | ENA

Temporal profile of germ-free and conventionally raised male mice (DUODENUM and ILEUM)

2018-09-01 | GSE114399 | GEO

Transcriptional profiling of intestinal tissue samples from germ-free and conventionally raised mice which are either wild-type or Myd88-/-

Project description:Whole-transcriptome survey of gene expression differences between germ-free (GF) and conventionally raised (CONV-R) mice. To assess the role of toll-like receptor signalling, both wild-type and Myd88 -/- mice were used. Four different tissues were harvested from 20 mice (5 WT CONV-R, 5 Myd88 -/- CONV-R, 4 WT GF, 6 Myd88 -/- GF) and expression profiles were determines using the Affymetrix Mouse Gene 1.0ST platform. 77 samples remained after quality control.

2011-12-08 | E-GEOD-17438 | biostudies-arrayexpress

Temporal profile of germ-free and conventionally raised male mice (epididymal white adipose tissue (WAT))

2018-09-01 | GSE114401 | GEO

RNA-seq analysis of conventionally raised zebrafish larvae compared to germ-free zebrafish larvae and germ-free larvae treated with zebrafish metabolites.

Project description:Here, we explore the impact of rearing zebrafish embryos in the absence of microbes on early neural development as well as investigate whether any potential changes can be rescued with treatment of metabolites derived from the zebrafish gut microbiota. RNA was extracted from a pool of five heads for each treatment at long-pec stage (2 days post fertilization) and sequenced at a depth of 80-100 million reads per sample. We identified 361 genes significantly down regulated in GF embryos compared to conventionally raised embryos via RNA-Seq analysis. Of these, 42 were rescued with the treatment of zebrafish gut-derived metabolites to GF embryos. Gene ontology analysis revealed that these genes are involved in prominent neurodevelopmental pathways including transcriptional regulation and Wnt signalling.

2022-01-01 | GSE182725 | GEO

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