Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Proteome and phosphoproteome analysis of brown adipocytes reveals that RICTOR loss dampens global insulin/AKT signaling

ABSTRACT: Stimulating brown adipose tissue (BAT) activity represents a promising therapy for overcoming metabolic diseases. mTORC2 has been shown to be important for regulating BAT metabolism, yet its mechanism of activation is not known, nor are the identities of its downstream effectors. In this study, we apply proteomics to investigate the role of mTORC2 in brown adipocytes. To assess the role of mTORC2 in brown adipocytes, we compare wild-type controls to isogenic cells with an induced knockout of the mTORC2-specific subunit RICTOR (Rictor-iKO) by stimulating each with insulin for a 30 minute time course, and measuring the proteomes and phosphoproteomes. In Rictor-iKO cells, we identify decreases to the abundance of glycolytic and de novo lipogenesis enzymes, and increases to mitochondrial proteins as well as a set of proteins known to increase upon interferon stimulation, suggesting increased interferon-like signaling. We observe significant differences to basal phosphorylation including decreased phosphorylation of the lipid droplet protein perilipin-1 in Rictor-iKO cells and Rictor-null mouse BAT, suggesting that RICTOR could be involved with regulating basal lipolysis or droplet dynamics. And finally, we observe a general dampening of the insulin signaling response in Rictor-iKO cells. Some sites exhibit significant dependence on RICTOR, including an AKT substrate site on ATP citrate lyase, which could partially explain the previously-observed RICTOR dependence of de novo lipogenesis from glucose in BAT.

INSTRUMENT(S): Orbitrap Fusion, Q Exactive

ORGANISM(S): Mus Musculus (ncbitaxon:10090)

SUBMITTER: Judit Villen

PROVIDER: MSV000084310 | MassIVE |

REPOSITORIES: MassIVE

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Transplantation of Committed Pre-adipocytes from Brown Adipose Tissue improves Whole-body Glucose Homeostasis

Project description:Obesity and its co-morbidities including type 2 diabetes are increasing at epidemic rates in the U.S. and worldwide. Brown adipose tissue (BAT) is a potential therapeutic to combat obesity and type 2 diabetes. Increasing BAT mass by transplantation improves metabolic health in rodents, but its clinical translation remains a challenge. Here, we investigated if transplantation of 2-4 million differentiated brown pre-adipocytes from mouse BAT stromal fraction (SVF) or human pluripotent stem cells (hPSCs) could improve metabolic health. Transplantation of differentiated brown pre-adipocytes, termed ‘committed pre-adipocytes’ from BAT SVF from mice or derived from hPSCs improves glucose homeostasis and insulin sensitivity in recipient mice under conditions of diet-induced obesity, and this improvement is mediated through the collaborative actions of the liver transcriptome, tissue AKT signaling and FGF21. These data demonstrate that transplantation of a small number of brown adipocytes has significant long-term translational and therapeutic potential to improve glucose metabolism.

2023-12-13 | GSE250078 | GEO

Apoptotic brown adipocytes enhance energy expenditure via SLC29A1-regulated extracellular inosine

Project description:Brown adipose tissue (BAT) dissipates energy and promotes cardio-metabolic health4. However, loss of BAT during obesity and aging is a principal hurdle for BAT-centered obesity therapies. So far not much is known about BAT apoptosis and signals released by apoptotic brown adipocytes. Here, untargeted metabolomics demonstrated that apoptotic brown adipocytes release a specific pattern of metabolites with purine metabolites being highly enriched. Interestingly, this apoptotic secretome enhances expression of the thermogenic program in healthy adipocytes to maintain tissue functionality. This effect is mediated by the purine inosine which stimulates energy expenditure (EE) in brown adipocytes. Phosphoproteomic analysis demonstrated activation of the cAMP/protein kinase A signaling pathway and of pro-thermogenic transcription factors by inosine.

2022-05-31 | PXD032153 | Pride

METTL14-mediated m6A differentially orchestrates brown and white adipose tissue transcriptomes to regulate systemic metabolism

Project description:Human brown and white adipocytes (hBAT and hWAT) display markedly distinct m6A landscapes; besides, in insulin-resistant humans and mice, methyltransferase like 14 (METTL14) expression differs significantly between BAT and WAT in the context of its correlation with insulin sensitivity. We therefore employed independent BAT- and WAT-specific METTL14 knockout models to unveil the cell-type specificity of m6A mRNA methylation. Mettl14 knockout via Ucp1-cre or Adipoq-cre drivers in BAT and WAT, respectively, yields divergent metabolic outcomes in mouse.

2024-11-08 | GSE250137 | GEO

Uncoupling Metabolic Health from Thermogenesis via BCAA Flux in Brown Fat

Project description:Brown adipose tissue (BAT) is best known for thermogenesis. Whereas numerous studies in rodents found tight associations between the metabolic benefits of BAT and enhanced whole-body energy expenditure, emerging evidence in humans suggests that BAT is protective against Type 2 diabetes independent of body-weight. The underlying mechanism for this dissociation remained unclear. Here, we report that impaired mitochondrial flux of branched-chain amino acids (BCAA) in BAT, by deleting mitochondrial BCAA carrier (MBC, encoded by Slc25a44), was sufficient to cause systemic insulin resistance without affecting whole-body energy expenditure or body-weight. We found that brown adipocytes catabolized BCAAs in the mitochondria as essential nitrogen donors for the biosynthesis of glutamate, N-acetylated amino acids, and one of the products, glutathione. BAT-selective impairment in mitochondrial BCAA flux led to elevated oxidative stress and insulin resistance in the liver, accompanied by reduced levels of BCAA-nitrogen derived metabolites in the circulation. In turn, supplementation of glutathione restored insulin sensitivity of BAT-specific MBC knockout mice. Notably, a high-fat diet rapidly impaired BCAA catabolism and the synthesis of BCAA-nitrogen derived metabolites in the BAT, while cold-induced BAT activity is coupled with an active synthesis of these metabolites. Together, the present work uncovers a mechanism through which brown fat controls metabolic health independent of thermogenesis via BCAA-derived nitrogen carriers acting on the liver.

2024-02-15 | PXD043992 | Pride

Uncoupling Metabolic Health from Thermogenesis via BCAA Flux in Brown Fat

2024-02-15 | PXD044020 | Pride

Bulk RNAseq of Mus musculus Protein Kinase D1 (Prkd1) knock-out adipose tissue in response to thermoneutral and cold exposure stress

Project description:Brown adipose tissue (BAT) has in recent times been rediscovered in adult humans, and together with work from preclinical models, shown to have the potential of providing a variety of positive metabolic benefits. These include improved insulin sensitivity and reduced susceptibility to obesity and its various co-morbidities. As such, its continued study could offer insights to therapeutically modulate this tissue to improve metabolic health. It has been reported that adipose-specific deletion of the gene for protein kinase D1 (Prkd1) enhances mitochondrial respiration and improves whole-body glucose homeostasis. We sought to determine whether these effects were mediated specifically through brown adipocytes using a Prkd1 brown adipose tissue (BAT) Ucp1-Cre-specific knockout mouse model, Prkd1BKO. We unexpectedly observed that upon both cold exposure and beta-3-AR agonist administration, Prkd1 loss in BAT did not alter canonical thermogenic gene expression or adipocyte morphology. We took an unbiased approach to assess whether other signaling pathways were altered. RNAs from cold-exposed control and Prkd1BKO were subjected to RNA-Seq analysis. These studies revealed that myogenic gene expression is altered in Prkd1BKO BAT after both acute (8 hr) and extended (4 day) cold exposure. Given that brown adipocytes and skeletal myocytes share a common precursor cell lineage expressing myogenic factor 5 (Myf5), these data suggest that loss of Prkd1 in BAT may alter the biology of preadipocytes in this depot. The data presented herein clarify the role of Prkd1 in BAT thermogenesis and present new avenues for the further study of Prkd1 function in BAT.

2023-09-01 | E-MTAB-12170 | biostudies-arrayexpress

Next generation sequencing analysis of microRNAs in brown preadipocytes and in vitro differentiated mature brown fat cells

Project description:We performed a genome-wide deep sequencing analysis of the microRNAs abundant in mesenchymal stem cells (MSCs) derived from murine brown adipose tissue and in in vitro differentiated mature brown adipocytes. Several microRNAs were identified as differentially regulated when comparing datasets from MSCs vs. mature fat cells. These microRNAs may have an implication in the regulation of adipogenesis as well as thermogenesis in brown adipose tissue (BAT). Examination of BAT-derived MSCs (BAT-MSC; 1 sample) and in vitro differentiated mature brown fat cells (BAT-DIFF; 1 sample) vertis biotechnologie AG, D-85354 Freising, Germany (library construction and sequencing)

2013-05-28 | E-GEOD-45499 | biostudies-arrayexpress

Coenzyme Q regulates UCP1 expression and thermogenesis through the integrated stress responses

Project description:Coenzyme Q is an essential component of mitochondrial function and required for thermogenic activity in brown adipose tissues (BAT). BAT CoQ deficiency (50-75%) by genetic or pharmacological means does not interfere with basal or maximal mitochondrial respiration in brown adipocytes but increases mitochondrial oxidants and induces UPRmt, ISR, and repression of UCP1 expression. ATF4, the master regulator of ISR, is required for UCP1 suppression in BAT CoQ deficiency. In animals, BAT CoQ deficiency causes cold intolerance but activates compensatory thermogenic mechanisms in BAT and other tissues via greatly induced BAT FGF21 expression resulting in paradoxically upregulated whole-body respiration rates and protection from obesity at room temperature and thermoneutrality. BAT-specific loss of either ATF4 or FGF21 abolishes these metabolic benefits demonstrating a central role for CoQ in the modulation of whole-body energy expenditure and thus for the etiology of primary and secondary CoQ deficiencies.

2022-02-01 | GSE165940 | GEO

PKGI WT vs KO BAT

Project description:Brown adipose tissue (BAT) and brown adipocytes differentiated in vitro from preadipocytes of PKGI-/- mice vs. WT were compared on a whole genome DNA array

2008-12-31 | GSE11890 | GEO

Gene expression data of brown-like adipocytes from Lgr4 homozygous mutant SVF

Project description:Obesity has become a global health problem. Brown adipose tissue (BAT), specialized for energy expenditure through thermogenesis, potently counteracts obesity. Recently, BAT is also identified in human adults. We found that Lgr4 homozygous mutant (Lgr4m/m) mice display reduced adiposity and exhibit brown-like adipocytes in their WAT depots with higher expression of uncoupling protein 1 (Ucp1). Furthermore, Lgr4 ablation potentiates brown adipocyte differentiation from stromal vascular fraction (SVF) of epididymal WAT (eWAT) in vitro. We used microarrays to emxamine the gene expression profiles of the brown-like adipocytes differentiated from SVF of wild-type and Lgr4 mutant mice. We identified distinct gene expression profiles of these two groups. To demonstrate Lgr4 ablation can potentiate the differentiation of SVF from eWAT toward brown-like adipocytes in vitro, we isolated SVF from epididymal white adipose tissue (eWAT) of wild-type (WT) and Lgr4 mutant mice. We then plated SVF cells in 12-well plate, and differentiated them to brown adipocytes, followed by RNA extraction and hybridization with Affymetrix microarrays.

2013-11-07 | E-GEOD-47760 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data