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A BAT-enriched RNA binding protein, Ybx2, regulates cold-induced brown fat activation by stabilizing Pgc1α mRNA

ABSTRACT: To study the role of Ybx2 in brown fat activity, we performed the RNA-seq data for wildtype and Ybx2 knockout brown fat under room temperature and upon cold exposure as well as for wildtype and Ybx2 knockout brown adipocytes culture from stromal vascular fraction cells. To determine the targets of Ybx2, we performed RNA immunopercipitatoin followed by RNA-seq

ORGANISM(S): Mus musculus

PROVIDER: GSE86590 | GEO | 2019/08/23

REPOSITORIES: GEO

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Brown Adipose YY1 Deficiency Activates Expression of Secreted Proteins Linked to Energy Expenditure and Prevents Diet-Induced Obesity [BAT]

Project description:Analysis of brown adipose tissue from Yin Yang 1 (YY1) brown fat specific knockout mice fed a high fat diet for 3 months. YY1 deficiency in brown adipose tissue leads to strong thermogenic deficiency. The goal was to identify the genes controlled by YY1 responsible of brown fat defective function.

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Brown Adipose YY1 Deficiency Activates Expression of Secreted Proteins Linked to Energy Expenditure and Prevents Diet-Induced Obesity [BAT]

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Wild type and Zbtb7b knockout mouse brown adipose tissue

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NFIA Controls the Brown Fat Gene Program by Co-Localizing with PPARgamma at Cell-Type-Specific Enhancers (RNA)

Project description:Brown fat dissipates energy as heat and protects against obesity. Here, we identified nuclear factor I-A (NFIA) as a novel transcriptional regulator of brown fat by a genome-wide open chromatin analysis of murine brown and white fat followed by motif analysis of brown-fat-specific open chromatin regions. NFIA and the adipogenic master regulator, PPARγ, co-localize at the brown-fat-specific enhancers. Moreover, the binding of NFIA precedes and facilitates the binding of PPARγ, leading to increased chromatin accessibility and active transcription. Introduction of NFIA into myoblasts results in brown adipocyte differentiation. Conversely, the brown fat of NFIA knockout mice displays impaired expression of the brown-fat-specific genes and reciprocal elevation of muscle genes. Finally, expression of NFIA and the brown-fat-specific genes is positively correlated in human brown fat. These results indicate that NFIA is a key transcriptional regulator of brown fat and exerts its effects by co-localizing with PPARγ at cell-type-specific enhancers.

2017-08-14 | GSE83762 | GEO

NFIA Controls the Brown Fat Gene Program by Co-Localizing with PPARgamma at Cell-Type-Specific Enhancers (chromatin)

Project description:Brown fat dissipates energy as heat and protects against obesity. Here, we identified nuclear factor I-A (NFIA) as a novel transcriptional regulator of brown fat by a genome-wide open chromatin analysis of murine brown and white fat followed by motif analysis of brown-fat-specific open chromatin regions. NFIA and the adipogenic master regulator, PPARgamma, co-localize at the brown-fat-specific enhancers. Moreover, the binding of NFIA precedes and facilitates the binding of PPARgamma, leading to increased chromatin accessibility and active transcription. Introduction of NFIA into myoblasts results in brown adipocyte differentiation. Conversely, the brown fat of NFIA knockout mice displays impaired expression of the brown-fat-specific genes and reciprocal elevation of muscle genes. Finally, expression of NFIA and the brown-fat-specific genes is positively correlated in human brown fat. These results indicate that NFIA is a key transcriptional regulator of brown fat and exerts its effects by co-localizing with PPARg at cell-type-specific enhancers.

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