The Innate Immune Factor IRF3 Reduces Adipose Thermogenesis via ISG15-mediated Reprogramming of Cellular Metabolism
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ABSTRACT:
PROVIDER: PRJNA648157 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR12314100_1.fastq.gz | Fastqsanger.gz | |||
| SRR12314100_2.fastq.gz | Fastqsanger.gz | |||
| SRR12314101_1.fastq.gz | Fastqsanger.gz | |||
| SRR12314101_2.fastq.gz | Fastqsanger.gz | |||
| SRR12314102_1.fastq.gz | Fastqsanger.gz |
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Project description:Purpose: Interferon regulatory factor 3 (IRF3) is activated by pro-inflammatory cytokines, but its role in regulating adaptive thermogenesis and energy expenditure remains unclear. Here, we report that IRF3 as a negative transcription regulator of adaptive thermogenesis. Adipocyte-specific IRF3 knockout (FI3KO) attenuates HFD-induced obesity by increasing energy expenditure; further studies show that IRF3 suppresses adaptive thermogenesis through ISG15-mediated inhibition of glycolysis in adipocytes. Conversely, overexpression of IRF3 in adipocytes causes reduced thermogenesis gene expression, energy expenditure, and more persistent to HFD-induced obesity. Moreover, Isg15-/- increases adipose thermogenesis and protects mice from HFD-induced obesity and glucose intolerance. Taken together, these data indicate that IRF3 as a transcriptional regulator connecting between inflammatory signaling pathway and energy homeostasis Methods: primary adipocyte mRNA profiles of 8-week-old wild-type (WT) and FI3OE mice were generated by deep sequencing. The sequence reads that passed quality filters were analyzed at the transcript isoform level. qRT–PCR validation was performed using RT-PCR. Conclusions: Our study represents the first detailed analysis of adipocyte transcriptomes from WT and FI3OE iWAT, with biologic replicates, generated by RNA-seq technology. The optimized data analysis workflows reported here should provide a framework for comparative investigations of expression profiles. Our results show that Irf3 adipocyte-speficic overrxpression markedly increases the expression of Isg15 and Herc6, which play important role in regulation of glycolysis.
2020-07-24 | GSE155019 | GEO
Project description:Adipose thermogenesis is repressed in obesity, reducing the homeostatic capacity to compensate for chronic overnutrition. Inflammation inhibits adipose thermogenesis, but little is known about how this occurs. Here we showed that the innate immune transcription factor IRF3 is a strong repressor of thermogenic gene expression and oxygen consumption in adipocytes. IRF3 achieved this by driving expression of the ubiquitin-like modifier ISG15, which became covalently attached to glycolytic enzymes, thus reducing their function and decreasing lactate production. Lactate repletion was able to restore thermogenic gene expression, even when the IRF3/ISG15 axis was activated. Mice lacking ISG15 phenocopied mice lacking IRF3 in adipocytes, as both had elevated energy expenditure and were resistant to diet-induced obesity. These studies provide a deep mechanistic understanding of how the chronic inflammatory milieu of adipose tissue in obesity prevents thermogenic compensation for overnutrition.
| S-EPMC8011904 | biostudies-literature
Project description:ISG15 is primarily documented as an interferon-stimulated, ubiquitin-like protein (ubl), which has anti-viral activity. Although ISG15 was the founding member of the ubl protein family, very little is known about its function. We have found that ISG15 expression in non-phagocytic cells is dramatically induced upon Listeria infection and that surprisingly this induction can be Type I Interferon independent. Listeria-mediated ISG15 induction depends on the cytosolic surveillance pathway, which senses bacterial DNA and signals through STING, TBK1, IRF3 and IRF7. Most importantly, we observed that ISG15 expression restricts Listeria infection both in vitro and in vivo. We then made use of Stable Isotope Labeling in tissue culture (SILAC) to identify the ISGylated proteins that could be responsible for the ISG15-mediated protective effect. Our SILAC analysis revealed that overexpression of ISG15 leads to a striking ISGylation of integral membrane proteins of the endoplasmic reticulum and Golgi apparatus, which correlates with increased canonical secretion of cytokines. Taken together, our data reveal a previously uncharacterized signaling pathway that restricts Listeria infection and acts via ISGylation, reinforcing the view that ISG15 is a key component of the innate immune arsenal of the mammalian host.
2017-03-29 | MSV000080750 | MassIVE
Project description:ISG15 is primarily documented as an interferon-stimulated, ubiquitin-like protein (ubl), which has anti-viral activity. Although ISG15 was the founding member of the ubl protein family, very little is known about its function. We have found that ISG15 expression in non-phagocytic cells is dramatically induced upon Listeria infection and that surprisingly this induction can be Type I Interferon independent. Listeria-mediated ISG15 induction depends on the cytosolic surveillance pathway, which senses bacterial DNA and signals through STING, TBK1, IRF3 and IRF7. Most importantly, we observed that ISG15 expression restricts Listeria infection both in vitro and in vivo. We then made use of Stable Isotope Labeling in tissue culture (SILAC) to identify the ISGylated proteins that could be responsible for the ISG15-mediated protective effect. Our SILAC analysis revealed that overexpression of ISG15 leads to a striking ISGylation of integral membrane proteins of the endoplasmic reticulum and Golgi apparatus, which correlates with increased canonical secretion of cytokines. Taken together, our data reveal a previously uncharacterized signaling pathway that restricts Listeria infection and acts via ISGylation, reinforcing the view that ISG15 is a key component of the innate immune arsenal of the mammalian host.
2015-07-24 | PXD001805 | Pride
Project description:We assessed how lack of ISG15 influences the levels of transcripts after IFNa stimulation. Expression data from ISG15 deficient patients (P1, P2, P3) and control (C1, C6, C16) hTert fibroblasts
2014-12-01 | GSE60359 | GEO
Project description:The interferon regulatory factors IRF3 and IRF7 are key players in the regulation of type I and III IFN genes. In this study, we analyzed the role of IRF3 and IRF7 for the host response to influenza A virus infections in Irf3-/-, Irf7-/- and Irf3-/-Irf7-/- knock-out mice.
2016-11-02 | GSE77600 | GEO
Project description:IRF3 is one of the most critical transcription factor in down stream of pattern recognition receptors (such as toll-like receptor and RIG-I-like receptor) signalling pathway. IRF3 is known to induce the expression of type I IFN gene upon virus infection. To furter examine the role of IRF3 in virus-induced gene expression, we preformed microarray analysis in IRF3-/- peritoneal macrophages infected with VSV, and found that IRF3 suppresses the expression of Il12b gene. Peritoneal macrophages from WT of IRF3-/- B6 mice were infected with VSV(1 M.O.I. ) for 6 hous, and then subjected to microarray analysis.
2012-05-19 | E-GEOD-37855 | biostudies-arrayexpress
Project description:Oxygen is essential for aerobic organisms, but little is known about its role in antiviral immunity. Here, we report that during responses to viral infection, the hypoxic conditions repress antiviral-responsive genes independently of HIF signalling. EGLN1 was identified as a key mediator of the enhancement exerted by the oxygen on antiviral innate immune responses. Under sufficient oxygen conditions, EGLN1 maintains its prolyl hydroxylase activity to catalyse hydroxylation of IRF3 at proline 10. This modification enhances IRF3 phosphorylation, dimerisation, and nuclear translocation, leading to subsequent IRF3 activation. Furthermore, mice and zebrafish with Egln1 deletion, treatment with the EGLN inhibitor, FG4592, or mice carrying an Irf3 P10A mutation are more susceptible to viral infections. These findings not only reveal a direct link between oxygen and antiviral responses, but also provide insights into the mechanisms by which oxygen regulates innate immunity
2024-01-18 | GSE253181 | GEO
Project description:ISG15 counteracts Listeria monocytogenes infection
| PRJEB9655 | ENA