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Single nucleus RNA sequencing in mouse brown adipose tissue at room temperature, cold condition and thermoneutrality

ABSTRACT: Single nucleus RNA sequencing in mouse brown adipose tissue at room temperature, cold condition and thermoneutrality

PROVIDER: PRJEB35752 | ENA |

REPOSITORIES: ENA

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Single nucleus RNA sequencing in mouse brown adipose tissue at room temperature, cold condition and thermoneutrality

Project description:Single nucleus RNA sequencing in mouse brown adipose tissue at room temperature, cold condition and thermoneutrality.

2020-07-13 | E-MTAB-8562 | biostudies-arrayexpress

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Project description:Purpose: The goal of this study are to compare global gene expression profile in brown adipose tissue in Cdk7 bKO and WT control mice at both RT and after 6 hours cold exposure Methods: Interscapular BAT pads were taken from 12-week-old CDK7 bKO and control littermates either at room temperature or after 6 hours of cold exposure with food. Mice were sacrificed at zeitgeber time 9. Total RNA was extracted with TRI Reagent (Sigma). Two RNA samples from two mice with same genotype and condition were pool together (each 250 ng) to constitute 500 ng of total RNA from biological triplicates (three WT-RT, three CDK7 bKO-RT, three WT-cold, and three CDK7 bKO-cold) for sequencing. Results: Reads were also aligned to the Mus musculus.GRCm38.86 transcriptome using STAR (v. 2.5.2b, Dobin et al. 2013) and the estimation of the isoforms abundance was computed using RSEM (v. 1.2.31, Li and Dewey 2011). Conclusions: Differentially expressed genes (DEGs) were identified between genotype and treatment.

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Project description:Insufficient mitochondrial quantity in brown adipose tissue (BAT) causes defective thermogenesis and positive energy balance, which is coupled with the development of obesity. Whether disturbance of mitochondrial quality affects BAT function remains unknown. Here, we describe that the brown adipocyte-specific Leucine-rich PPR motif-containing protein knockout mice (LrpprcBKO) exhibited mitochondrial electron transport chain (ETC) proteome imbalance and a complete loss of the -adrenergic-stimulated thermogenesis at room temperature (RT), due to specific reduction of mtDNA-encoded genes. However, the LrpprcBKO mice were lean at normal chow and were protected against high-fat-diet-induced metabolic abnormalities, such as obesity, insulin resistance, adipose inflammation, hepatic steatosis, and hypertriglyceridemia. The beige adipocytes in inguinal white adipose tissue were expanded in LrpprcBKO mice at RT, but not at thermoneutrality. However, BAT thermogenic defects and metabolic benefits were present in LrpprcBKO mice regardless of ambient temperatures. Collectively, our results reveal that a thermogenesis-incapable BAT with mitochondrial ETC proteome imbalance can improve systemic metabolism, suggesting BAT’s contributions to thermoregulation and systemic metabolism can be uncoupled.

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