Ontology highlight
ABSTRACT:
PROVIDER: PRJNA780796 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR16955244_1.fastq.gz | Fastqsanger.gz | |||
| SRR16955244_2.fastq.gz | Fastqsanger.gz | |||
| SRR16955245_1.fastq.gz | Fastqsanger.gz | |||
| SRR16955245_2.fastq.gz | Fastqsanger.gz | |||
| SRR16955247_1.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 18 |
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Project description:Analysis of whole small intestine tissue of 10-week old C57BL/6J mice, C57BL/6J mice with the disruption of either Fabp2 gene or Fabp6 gene, and C57BL/6J mice with the simultaneous disruption of Fabp2 and Fabp6 genes. Fabp2 and Fabp6 are two types of fatty acid binding proteins expressed primarily in the small intestine.
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Project description:The effects of high-fat (HF) feeding on the gene expression in the small intestine were examined using obesity-resistant A/J mice and obesity-sensitive C57BL/6J (B6) mice. Both strains of mice were maintained on low-fat (LF, 5% fat) or HF (30% fat) diets for two weeks. Oligonucleotide microarray and semi-quantitative RT-PCR analysis revealed that lipid metabolism-related genes including mitochondrial acyl-CoA thioesterase 1, pyruvate dehydrogenase kinase 4, and NADP+-dependent cytosolic malic enzyme were up-regulated by more than 2-fold in both strains of mice. The up-regulated gene expression levels were significantly higher in A/J mice than in B6 mice, suggesting the active lipid metabolism in the small intestine of A/J mice. Keywords: diet response, strain difference
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Project description:By regulating digestion and absorption of nutrients and providing a barrier against the external environment the intestine provides a crucial contribution to the maintenance of health. To what extent aging-related changes in the intestinal system contribute to the impaired health of the aging body is still under debate. Young (4 months) and old (21 months) male C57BL/6J mice were fed a control low-fat (10E%) or a high-fat diet (45E%) for 2 weeks. During the intervention gross energy intake and energy excretion in the feces were measured. After sacrifice the small and large intestine were isolated whereby the small intestine was divided in three equal parts. Of each of the isolated segments Swiss rolls were prepared for histological analysis and the luminal content was isolated to examine alterations in the microflora with 16S rRNA Q-PCR. Furthermore, mucosal scrapings were isolated from each segment to determine differential gene expression by microarray analysis and global DNA methylation by pyrosequencing. Digestible energy intake was similar between the two age groups on both the control and the high-fat diet implying that macronutrient metabolism is not affected in 21-month-old mice. This observation was supported by the fact that the microarray analysis on RNA from intestinal scrapings showed no marked changes in expression of genes involved in metabolic processes. Decreased expression of Cubilin was observed in the intestine of 21-month-old mice, which might contribute to aging-induced vitamin B12 deficiency. Furthermore, microarray data analysis revealed enhanced expression of a high number of genes involved in immune response and inflammation in the colon, but not in the small intestine of the 21-month-old mice. Aging-induced global hypomethylation was observed in the colon and the distal part of the small intestine, but not in the first two sections of the small intestine. In 21-month old mice the most pronounced effects of aging was observed in the colon, limited changes were observed in the small intestine. Young (4 months) and old (21 months) C57BL/6J mice were fed a low-fat (10E%) diet or high-fat (45%E) diet for 2 weeks. After the diet intervention period, the animals were killed and scrapings were made of the proximal, middle and distal part of the small intestine. Total RNA was isolated, pooled and subjected to gene expression profiling.
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