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Interaction between PPARγ and mTORC1 in the regulation of inguinal white adipose tissue transcriptome

ABSTRACT: Interaction between PPARγ and mTORC1 in the regulation of inguinal white adipose tissue transcriptome

PROVIDER: PRJNA702528 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13734410_1.fastq.gz	Fastqsanger.gz
	SRR13734410_2.fastq.gz	Fastqsanger.gz
	SRR13734411_1.fastq.gz	Fastqsanger.gz
	SRR13734411_2.fastq.gz	Fastqsanger.gz
	SRR13734412_1.fastq.gz	Fastqsanger.gz

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Interaction between PPARγ and mTORC1 in the regulation of inguinal white adipose tissue transcriptome

Project description:Purpose: To investigate the involvement of mTORC1 as a mediator of the actions of the PPARγ ligand rosiglitazone in subcutaneous inguinal white adipose tissue transcriptome; Methods: Mice bearing regulatory associated protein of mTOR (Raptor) deletion and therefore mTORC1 deficiency exclusively in adipocytes (adiponectin Cre recombinase) and littermate controls were fed a high-fat diet supplemented or not with the PPARγ agonist rosiglitazone (30 mg/kg/day) for 8 weeks and evaluated for inguinal white adipose tissue transcriptome (Rnaseq); Results: 3,2425 genes had their correspondent mRNA levels altered by either adipocyte Raptor deficiency or rosiglitazone administration or their combination. Among those, 408 genes modulated by rosiglitazone required mTORC1. Conclusion: PPARγ and mTORC1 are essential partners in the regulation of a cluster of genes in inguinal white adipose tissue.

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Project description:Interplay between parenchymal energy-storing white adipose cells and thermogenic beige adipocytes contributes to obesity and insulin resistance. Irrespective of cellular origin or specialized niche, adipocytes require the activity of the nuclear receptor peroxisome proliferator activated receptor gamma (PPARγ) for proper function. Exposure to cold or adrenergic signaling enriches thermogenic cells though multiple pathways that act synergistically with PPARγ, however, the molecular mechanisms by which PPARγ licenses white adipose tissue (WAT) to preferentially adopt a thermogenic or white adipose fate in response to dietary cues or thermoneutral conditions are not fully elucidated. Here, we show that a PPARγ-long noncoding RNA (lncRNA) axis integrates canonical and noncanonical thermogenesis to restrain white adipose tissue heat dissipation during thermoneutrality and diet-induced obesity (DIO). Pharmacologic inhibition or genetic deletion of the lncRNA Lexis, enhances UCP-1 dependent and independent thermogenesis. Adipose tissue specific deletion of Lexis counteracted diet-induced obesity, improved insulin sensitivity, and enhanced energy expenditure. Single-nuclei transcriptomics revealed that Lexis regulates a distinct population of thermogenic adipocytes. We systematically map Lexis motif preferences and show that it regulates the thermogenic program through the activity of the metabolic GWAS gene and WNT modulator TCF7L2. Collectively, our studies uncover a new mode of crosstalk between PPARγ and WNT signaling that preserves white adipose tissue plasticity.

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