GDF15 and energy expenditure
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA957834 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR24166700_1.fastq.gz | Fastqsanger.gz | |||
| SRR24166700_2.fastq.gz | Fastqsanger.gz | |||
| SRR24179000_1.fastq.gz | Fastqsanger.gz | |||
| SRR24179000_2.fastq.gz | Fastqsanger.gz | |||
| SRR24166701_1.fastq.gz | Fastqsanger.gz |
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Project description:The combination of decreasing food intake and increasing energy expenditure represents a powerful strategy for counteracting cardiometabolic diseases, such as obesity and type 2 diabetes1. Yet current approaches require conjugating multiple receptor agonists to achieve both effects2–4 and, thus far, no safe energy-expending option has reached the clinic. Here we show that activation of Neurokinin 2 Receptor (NK2R) is sufficient to suppress appetite centrally and increase energy expenditure peripherally. We focused on NK2R after discovering its genetic links to obesity and glucose control. However, therapeutically exploiting NK2R signalling has previously been unattainable because its endogenous ligand, Neurokinin A (NKA), is short-lived and lacks receptor specificity5,6. Therefore, we developed selective, long-acting NK2R agonists, with potential for once-weekly administration in humans. In mice, these agonists elicit weight loss by inducing energy expenditure and non-aversive appetite suppression that circumvents canonical leptin signalling. Additionally, a hyperinsulinemic-euglycemic clamp reveals that NK2R agonism acutely enhances insulin sensitization. In diabetic, obese nonhuman primates, NK2R activation significantly decreases body weight, blood glucose, triglycerides, and cholesterol, and ameliorates insulin resistance. These findings identify a single receptor target that leverages both energy-expending and appetite-suppressing programs to improve energy homeostasis and reverse cardiometabolic dysfunction across species.
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Project description:Steap4, highly expressed in adipose tissue, is associated with metabolic homeostasis. Dysregulated adipose and mitochondrial metabolism contribute to obesity, highlighting the need to understand their interplay. Whether and how Steap4 influences mitochondrial function, adipocytes, and energy expenditure remains unclear. Adipocyte-specific Steap4-deficient mice exhibited increased fat mass and severe insulin resistance in our high-fat diet model. Mass spectrometry identified two classes of Steap4 interactomes: mitochondrial proteins and proteins involved in splicing. RNA-seq analysis of white adipose tissue demonstrated that Steap4 deficiency altered RNA splicing patterns with enriched mitochondrial functions. Indeed, Steap4 deficiency impaired respiratory chain complex activity, causing mitochondrial dysfunction in white adipose tissue. Consistently, brown adipocyte-specific Steap4 deficiency impaired mitochondrial function, increased brown fat whitening, reduced energy expenditure, and exacerbated insulin resistance in a high-fat model. Overall, our study highlights Steap4’s critical role in modulating adipocyte mitochondrial function, thereby controlling thermogenesis, energy expenditure, and adiposity.
2025-02-03 | GSE247291 | GEO
Project description:Prader-Willi syndrome (PWS), a genetic cause of childhood obesity, is characterized by intellectual disabilities and sleep abnormalities. PWS-causing deletions include a neuronal long, non-coding RNA (lncRNA) processed into small nucleolar RNAs and a spliced lncRNA,116HG. We show that 116HG forms a subnuclear RNA cloud that co-purifies with the transcriptional activator RBBP5 and active metabolic genes, remains tethered to the site of its transcription and increases in size in postnatal neurons. Snord116del mice lacking 116HG exhibited increased energy expenditure corresponding to dysregulation of diurnally expressed Mtor and circadian genes Clock, Cry1, and Per2. Genomic and metabolic analyses demonstrate altered diurnal energy regulation in the Snord116del mouse cortex and link the loss of 116HG to the energy imbalance observed in PWS. Examination of lncRNA binding sites by ChIRP-seq using an oligo-based purification method from WT and Snord116del (+/-) mouse brain with specific and nonspecific control oligos. Transcript abundance levels by RNA-seq analysis of 3 adult WT and 2 adult Snord116del (+/-) mouse brain cortices at Zt+6 and 2 adult WT and 2 adult Snord116del (+/-) mouse brain cortices at Zt+16.
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Project description:Mechanisms to coordinately regulate oxidative metabolism and glucose transport into cells are not well described. In muscle and fat, insulin mobilizes GLUT4 glucose transporters to the cell surface in part by stimulating the site-specific endoproteolytic cleavage of TUG proteins. Here, we show that the TUG C-terminal cleavage product enters the nucleus, binds the transcriptional 30 regulators PGC-1a and PPARg, and increases oxidative metabolism, thermogenic protein expression, and energy expenditure. The PPARg2 Pro12Gly polymorphism, which confers reduced diabetes risk, enhances TUG binding. The TUG cleavage product stabilizes PGC-1a, so that both proteins are susceptible to an Ate1 arginyltransferase -dependent degradation mechanism. We conclude that TUG cleavage coordinates energy expenditure with glucose 35 uptake, and that alterations in this pathway may contribute to metabolic disease.
2020-07-23 | GSE134846 | GEO
Project description:Prader-Willi syndrome (PWS), a genetic cause of childhood obesity, is characterized by intellectual disabilities and sleep abnormalities. PWS-causing deletions include a neuronal long, non-coding RNA (lncRNA) processed into small nucleolar RNAs and a spliced lncRNA,116HG. We show that 116HG forms a subnuclear RNA cloud that co-purifies with the transcriptional activator RBBP5 and active metabolic genes, remains tethered to the site of its transcription and increases in size in postnatal neurons. Snord116del mice lacking 116HG exhibited increased energy expenditure corresponding to dysregulation of diurnally expressed Mtor and circadian genes Clock, Cry1, and Per2. Genomic and metabolic analyses demonstrate altered diurnal energy regulation in the Snord116del mouse cortex and link the loss of 116HG to the energy imbalance observed in PWS.
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Project description:NK2R control of energy expenditure and feeding to treat metabolic diseases
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Project description:Adipocyte-specific Steap4 deficiency reduced thermogenesis and energy expenditure in mice
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Project description:Steap4, a highly expressed protein in adipose tissue, has been implicated in metabolic homeostasis. In this study, we generated adipocyte-specific Steap4-deficient mice and observed that Steap4 deficiency led to increased fat mass and severe insulin resistance in a high-fat diet model. Mass spectrometry analysis revealed two classes of Steap4 interactomes: mitochondrial proteins and proteins involved in spliceosome. RNA-seq analysis of white adipose tissue demonstrated that Steap4 deficiency altered RNA splicing patterns with enriched functions in mitochondria. While interactome and transcriptome data implicate a role of Steap4 in mitochondria, Steap4 deficiency indeed impaired mitochondrial respiratory chain complex activity resulting in mitochondrial dysfunction in white adipose tissue. Consistently, brown adipocyte-specific Steap4-deficient mice also showed impaired mitochondrial function, increased whitening of brown adipose tissue, reduced energy expenditure, and exacerbated insulin resistance under HFD conditions. Overall, our findings elucidate the critical role of Steap4 in regulating adipocyte thermogenesis and energy expenditure by modulating mitochondrial function.
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