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Undernutrition disrupts jejunal and ileal microbiota and epithelial tissue homeostasis in a pregnant sheep model

ABSTRACT: Undernutrition disrupts jejunal and ileal microbiota and epithelial tissue homeostasis in a pregnant sheep model

PROVIDER: PRJNA991945 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25180074_1.fastq.gz	Fastqsanger.gz
	SRR25180074_2.fastq.gz	Fastqsanger.gz
	SRR25180075_1.fastq.gz	Fastqsanger.gz
	SRR25180075_2.fastq.gz	Fastqsanger.gz
	SRR25180076_1.fastq.gz	Fastqsanger.gz

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Undernutrition disrupts jejunal and ileal microbiota and epithelial tissue homeostasis in a pregnant sheep model

Project description:In the current study, five late gestation multiparous ewes were restricted to a 30% feeding level to create a model of malnutrition, while five other ewes were fed normally as controls. All ewes were sacrificed and jejunal and ileal samples were collected for transcriptome sequencing to study metabolic changes.

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Project description:The purpose of this study was to investigate the relative mRNA expression related to hormone, antioxidant capacity and immune responses in jejunal and ileal mucosa of healthy and postnatal growth retardation pigs. At 42 d of age, after overnight fasting, six postnatal growth retardation pigs and six healthy pigs were pair-matched by litter were selected for sampling. Samples of the jejunal and ileal mucosa were scraped and immediately snap-frozen in liquid nitrogen and stored at −80°C for RNA extraction. We used Roche LightCycler ® 480 Instrument PCR assay panel to quantitate gene expression of hormone, antioxidant capacity and immune responses relevant genes from jejunal and ileal mucosa.

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Project description:Undernutrition disrupts jejunal and ileal microbiota and epithelial tissue homeostasis in a pregnant sheep model

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Project description:GATA4 is expressed in the proximal 85% of small intestine where it promotes a proximal intestinal ('jejunal') identity while repressing a distal intestinal ('ileal') identity, but its molecular mechanisms are unclear. Here, we tested the hypothesis that GATA4 promotes a jejunal versus ileal identity in mouse intestine by directly activating and repressing specific subsets of absorptive enterocyte genes by modulating the acetylation of histone H3, lysine 27 (H3K27), a mark of active chromatin, at sites of GATA4 occupancy. Global analysis of mouse jejunal epithelium showed a statistically significant association of GATA4 occupancy with GATA4-regulated genes. Occupancy was equally distributed between down- and up-regulated targets, and occupancy sites showed a dichotomy of unique motif over-representation at down- versus up-regulated genes. H3K27ac enrichment at GATA4-binding loci that mapped to down-regulated genes (activation targets) was elevated, changed little upon conditional Gata4 deletion, and was similar to control ileum, whereas H3K27ac enrichment at GATA4-binding loci that mapped to up-regulated genes (repression targets) was depleted, increased upon conditional Gata4 deletion, and approached H3K27ac enrichment in wild-type control ileum. These data support the hypothesis that GATA4 both activates and represses intestinal genes, and show that GATA4 represses an ileal program of gene expression in the proximal small intestine by inhibiting the acetylation of H3K27. 2 samples were analyzed (1 ChIPseq, 1 input sample), control was done by confirming ChIP-qPCR on specific targets

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