Ontology highlight
ABSTRACT:
PROVIDER: PRJNA578991 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR10331500_1.fastq.gz | Fastqsanger.gz | |||
| SRR10331500_2.fastq.gz | Fastqsanger.gz | |||
| SRR10331501_1.fastq.gz | Fastqsanger.gz | |||
| SRR10331501_2.fastq.gz | Fastqsanger.gz | |||
| SRR10331502_1.fastq.gz | Fastqsanger.gz |
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Project description:Adipose tissue is the major depot for energy storage. Recent studies have shown that at least three types of adipocytes can be distinguished depending on their anatomical locations : 1) The classic brown adipocytes, i.e., brown adipose tissue (BAT); 2) The 'brite' (brown-in-white) adipocytes, i.e. inguinal white adipose tissue (iWAT); 3) The 'true' white adipocytes, i.e., epididymal white adipose tissue (eWAT). Two strains of mice (SV129 and C57BL/6J) were used in this study. SV strain is resistant to obesity and latter is prone to obesity. Pre-adipocyte cells were isolated from subcutaneous tissue (iWAT) to create four groups of cell cultures per strain of mouse.
2016-04-20 | GSE57903 | GEO
Project description:Elevated serum concentrations of glucocorticoids (GCs) result in excessive lipid accumulation in white adipose tissue (WAT) as well as dysfunction of thermogenic brown adipose tissue (BAT) – ultimately leading to the development of obesity and metabolic disease. Here, we examined the impact of cold exposure on the adverse metabolic effects of chronic GC exposure on adipose tissue in rodents.
2022-09-04 | GSE212349 | GEO
Project description:Brown adipose tissue (BAT) is a thermogenic organ that dissipates stored energy as heat to maintain body temperature in infants and small mammals. This process may also provide protection from development of diet-induced obesity. We found that the bioactive lipid mediator lysophosphatidic acid (LPA) markedly decreases differentiation of cultured primary brown adipocyte precursors, while potent selective inhibitors of the LPA-generating enzyme autotaxin (ATX) promote differentiation. Transgenic mice overexpressing ATX exhibited reduced expression of BAT-related genes in peripheral white adipose tissue and accumulated significantly more fat than wild-type controls when fed a high fat diet. Our results indicate that ATX and its product LPA are physiologically relevant negative regulators of brown fat adipogenesis and suggest that a decrease in peripheral brown adipose tissue results in increased susceptibility to diet-induced obesity in mice. Primary BAT cell cultures were established as previously reported with some minor modifications (Cannon B., 2001; Néchad M., 1983). Four- to 6-week-old mice were euthanized under aseptic conditions and interscapular BAT (IBAT) dissected, finely minced in digestion buffer containing 123 mM NaCl, 5mM HCl, 1.3 mM CaCl2, 5mM glucose, 1.5% (w/v) crude bovine serum albumin fraction V, 100 mM HEPES, 0.2% collagenase type II (Sigma-Aldrich Corp., St. Louis, MO), pH 7.4, and digested in 10 ml of the same buffer for 30 min at 37°C. The supernatant obtained was then filtered using a 250 µm nylon mesh and kept in ice for 15 minutes to allow fat droplets and mature cells to float. The resulting infranatant was filtered through a 30 µm nylon mesh to enrich the fraction with precursor cells and centrifuged at 700g for 10 min. The pellet obtained was washed once in warm DMEM and resuspended in DMEM medium containing 10% newborn calf serum, 10 mM HEPES, 4mM glutamine, 25 µg/ml sodium ascorbate (Sigma-Aldrich Corp., St. Louis, MO)., 100U/ml penicillin and 100mg/ml streptomycin. Cells were seeded onto 35mm dish plates. Insulin treatment was started on day 1 at 50 nM and the concentration increased to 100 nM at day 5 and 200 nM at day 7. Differentiated/confluent cells were collected for biochemical analysis (~day 9). To identify genes regulated by ATX and LPA signaling, 9 DIV primary BAT cultures were treated with the vehicle (DMSO), specific ATX inhibitor HA155 (2.5µM), or LPA (1-Oleoly-LPA, 5µM) (Avanti Polar Lipids, AL, USA) during differentiation. Treatment of the BAT cultures did not affect confluence or markers of proliferation. RNA was extracted from three cultures per condition using TRIzol reagent (Invitrogen, Carlsbad, CA) as described previously (Blalock EM., 2003).
2011-06-01 | E-GEOD-26442 | biostudies-arrayexpress
Project description:To identify candidates of interest that were more highly expressed in BAT than WAT, we conducted RNAseq in human primary brown and white adipocytes. Adipose tissue was obtained from the central compartment of the neck, superior to the clavicle and deep to the lateral thyroid lobe either adjacent to the longus colli muscle or to the oesophagus (brown adipose tissue) and more superficially from the subcutaneous neck tissue (white adipose tissue). The stromal vascular fraction was isolated and cultured as described (Ramage, Akyol et al. 2016 doi: 10.1016/j.cmet.2016.06.011). Following differentiation, cells were cultured in serum-stripped medium for 48 hours prior to RNA extraction and subsequent bulk RNA-seq.
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Project description:Early B Cell Factor 2 (EBF2) is required for brown adipose tissue basal thermogenic gene expression; however, it was unknown whether chronic cold exposure normalized the enhancer landscape of Ebf2 mutant mice. We profiled H3K27Ac binding in Ebf2 WT and mutant brown adipose tissue in mice housed at room temperature or one week of cold exposure.
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Project description:Brown adipose tissue is specialized to burn lipids for heat generation as a natural defense against cold and obesity. Previous studies established microRNAs as essential regulators of brown adipocyte differentiation, but it remains unknown whether microRNAs are required for the feature maintenance of mature brown adipocytes. To address this question, we ablated Dgcr8, a key regulator of the microRNA biogenesis pathway, in mature brown as well as white adipocytes. The adipose tissue -specific Dgcr8 knockout mice displayed enlarged but pale interscapular brown fat with decreased expression of genes characteristic of brown fat, and the mice were intolerant to cold exposure. In vitro primary brown adipocyte cultures confirmed that microRNAs are required for marker gene expression in mature brown adipocytes. We also demonstrated that microRNAs are essential for the browning of subcutaneous white adipocyte both in vitro and in vivo. Using this animal model, we performed microRNA expression profiling analysis and identified a set of BAT-specific microRNAs that are up-regulated during brown adipocyte differentiation and enriched in brown fat compared to other organs. We identified miR-182 and miR-203 as new regulators of brown adipocyte development. Taken together, our study demonstrates an essential role of microRNAs in the maintenance as well as the differentiation of brown adipocytes.
2014-08-07 | GSE60165 | GEO
Project description:Adipose tissues, particularly beige and brown adipose tissue, play crucial roles in energy metabolism. Brown adipose tissues’ thermogenic capacity and the appearance of beige cells within white adipose tissue have spurred interest in their metabolic impact and therapeutic potential. Brown and beige fat cells, activated by factors like cold exposure, share mechanisms that drive non-shivering thermogenesis. Understanding their behavior requires sophisticated, yet universal in vitro models that replicate the complex microenvironment and vasculature of adipose tissues. Here we present mouse vascularized adipose spheroids of the stromal vascular microenvironment from inguinal white adipose tissue. We show that scaffold embedding improves vascular sprouting, enhances spheroid growth, and upregulates adipogenic markers. Transcriptional profiling via RNA sequencing revealed distinct metabolic pathways upregulated in our vascularized adipose spheroids, with increased expression of genes involved in glucose metabolism, lipid metabolism, and thermogenesis. Functional assessment demonstrated increased oxygen consumption in vascularized adipose spheroids compared to 2D cultures, which was further enhanced by β-adrenergic receptor stimulation via isoproterenol correlating with elevated β-adrenergic receptor expression. Moreover, stimulation with the naturally occurring adipokine, FGF21, induced Ucp1 mRNA expression in the vascularized adipose spheroids. In conclusion, our vascularized inguinal white adipose tissue spheroids provide a physiologically relevant platform to study how the stromal vascular microenvironment shapes adipocyte responses and influence activated thermogenesis in beige adipocytes.
2024-05-02 | GSE261267 | GEO