Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA167280 | ENA |
REPOSITORIES: ENA
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Project description:The effects of adiponectin on hepatic glucose and lipid metabolism at transcriptional level are largely unknown. We profiled hepatic gene expression in adiponectin knockout (KO) and wild-type (WT) mice by RNA-Seq. Comparing to WT mice, adiponectin KO mice exhibited decreased mRNA expression of rate-limiting enzymes in several important glucose and lipid metabolic pathways including glycolysis, TCA cycle, fatty-acid activation and synthesis, triglyceride synthesis and cholesterol synthesis. In addition, binding of the transcription factor Hnf4a to DNAs encoding several key metabolic enzymes was reduced in KO mice, suggesting that adiponectin might regulate hepatic gene expression via Hnf4a. Phenotypically, adiponectin KO mice possessed smaller epididymal fat pads and showed reduced body weights comparing to WT mice. When fed a high fat diet, adiponectin KO mice showed significantly reduced lipid accumulation in the livers. These lipogenic defects are consistent with the downregulation of lipogenic genes in the KO mice.
2012-09-04 | GSE38144 | GEO
Project description:The effects of adiponectin on hepatic glucose and lipid metabolism at transcriptional level are largely unknown. We profiled hepatic gene expression in adiponectin knockout (KO) and wild-type (WT) mice by RNA-Seq. Comparing to WT mice, adiponectin KO mice exhibited decreased mRNA expression of rate-limiting enzymes in several important glucose and lipid metabolic pathways including glycolysis, TCA cycle, fatty-acid activation and synthesis, triglyceride synthesis and cholesterol synthesis. In addition, binding of the transcription factor Hnf4a to DNAs encoding several key metabolic enzymes was reduced in KO mice, suggesting that adiponectin might regulate hepatic gene expression via Hnf4a. Phenotypically, adiponectin KO mice possessed smaller epididymal fat pads and showed reduced body weights comparing to WT mice. When fed a high fat diet, adiponectin KO mice showed significantly reduced lipid accumulation in the livers. These lipogenic defects are consistent with the downregulation of lipogenic genes in the KO mice. Mice were fasted overnight before euthanization. Liver tissues from WT or adiponectin KO male mice (n = 9-10) at 12 weeks of age were harvested and subjected to total RNA extraction using an RNeasy Plus Mini Kit (Qiagen, Valencia, CA). Total RNA from nine to ten mice of the same strain was pooled together as one biological sample. The mRNA sequencing samples were prepared using the Illumina sample preparation protocol (RS-930-1001, Illumina, Inc. San Diego, CA). The cDNA fragments of 200–250 bp were purified on an agarose gel and then enriched by PCR with Phusion polymerase. The cDNA libraries were sequenced by an Illumina Genome analyzer II at the Whitehead Genome Technology Core.
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Project description:Although the global prevalence of type 2 diabetes is still rising, the molecular mechanisms of dysregulated glucose and lipid metabolism are still incompletely understood. Epigenetic mechanisms were shown to have an impact in disease manifestation, but still the hepatic miRNA expression signature in diabetic subjects was not completely elucidated. We used microarrays to performe a genome wide screen of the complete noncoding RNA transcriptome in order to identify dsyregulated miRNAs which target genes of the hepatic glucose and lipid metabolism.
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Project description:A glucose-rich diet shortens lifespan via altering lipid metabolism in many organisms, including Caenorhabditis elegans. However, it remains incompletely understood how glucose and lipid metabolism regulates lifespan. Here, we show that Lipin 1/LPIN-1, a phosphatidic acid phosphatase and a putative transcription co-regulator that mediates glucose-to-triacylglyceride synthesis, prevents the life-shortening effects of glucose-rich diets on C. elegans. We showed that the expression levels of many genes related to lipid metabolism were differentially regulated by lpin-1 RNAi and glucose treatment.
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