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Epididymal adipose tissue gene sequencing of mice on a normal diet, with or without gavage of Oscillibacter valericigenes

ABSTRACT: Epididymal adipose tissue gene sequencing of mice on a normal diet, with or without gavage of Oscillibacter valericigenes

PROVIDER: PRJNA889386 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21862000.fastq.gz	Fastqsanger.gz
	SRR21862001.fastq.gz	Fastqsanger.gz
	SRR21862002.fastq.gz	Fastqsanger.gz
	SRR21862003.fastq.gz	Fastqsanger.gz
	SRR21862004.fastq.gz	Fastqsanger.gz

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Epididymal adipose tissue gene sequencing of mice on a normal diet, with or without gavage of Oscillibacter valericigenes

Project description:Paper abstract: Microbiota contribute to the induction of type 2 diabetes by high-fat/high-sugar (HFHS) diet, but which organs/pathways are impacted by microbiota remain unknown. Using multiorgan network and transkingdom analyses, we found that microbiotadependent impairment of OXPHOS/mitochondria in white adipose tissue (WAT) plays a primary role in regulating systemic glucose metabolism. The follow-up analysis established that Mmp12+ macrophages link microbiota-dependent inflammation and OXPHOS damage in WAT. Moreover, the molecular signature of Mmp12+ macrophages in WAT was associated with insulin resistance in obese patients. Next, we tested the functional effects of MMP12 and found that Mmp12 genetic deficiency or MMP12 inhibition improved glucose metabolism in conventional, but not in germ-free mice. MMP12 treatment induced insulin resistance in adipocytes. TLR2-ligands present in Oscillibacter valericigenes bacteria, which are expanded by HFHS, induce Mmp12 in WAT macrophages in a MYD88-ATF3–dependent manner. Thus, HFHS induces Mmp12+ macrophages and MMP12, representing a microbiota-dependent bridge between inflammation and mitochondrial damage in WAT and causing insulin resistance.

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Project description:Microbiota contributes to induction of type 2 diabetes by high-fat/high-sugar (HFHS), but which organs/pathways are impacted by microbiota remains unknown. Using multi-organ network and transkingdom analyses, we found that microbiota-dependent. impairment of OXPHOS /mitochondria in white adipose tissue (WAT) plays a primary role in regulating systemic glucose metabolism. The follow-up analysis established that Mmp12+ macrophages link microbiota-dependent inflammation and OXPHOS damage in WAT. Moreover, the molecular signature of Mmp12+ macrophages in WAT was associated with insulin resistance in obese patients. Next, we tested functional effects of MMP12 and found that Mmp12 genetic deficiency or MMP12 inhibition improved glucose metabolism in conventional, but not in germfree mice. MMP12 treatment induced insulin resistance in adipocytes. TLR2-ligands present in Oscillibacter valericigenes bacteria, which are expanded by HFHS, induce Mmp12 in WAT macrophages in a MYD88-ATF3-dependent manner. Thus, HFHS induces Mmp12+ macrophages and MMP12, representing a microbiota-dependent bridge between inflammation and mitochondrial damage in WAT and causing insulin resistance. doi: https://doi.org/10.1084/jem.20220017

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Complete genome sequence of Oscillibacter valericigenes Sjm18-20(T) (=NBRC 101213(T)).

Project description:Oscillibacter valericigenes is a mesophilic, strictly anaerobic bacterium belonging to the clostridial cluster IV. Strain Sjm18-20(T) (=NBRC 101213(T) =DSM 18026(T)) is the type strain of the species and represents the genus Oscillibacter Iino et al. 2007. It was isolated from the alimentary canal of a Japanese corbicula clam (Corbicula japonica) collected on a seacoast in Shimane Prefecture in Japan. Phylogenetically, strain Sjm18-20(T) is closest to uncultured bacteria in digestive tracts, including the enriched cells thought to represent Oscillospira guilliermondii Chatton and Perard 1913. The isolated phylogenetic position and some distinct characteristics prompted us to determine the complete genome sequence. The 4,410,036 bp chromosome and the 60,586 bp plasmid were predicted to encode a total of 4,723 protein-coding genes.

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