Global, neuronal, and beta-cell specific deletion of the insulin inhibitory receptor (inceptor) improves glucose homeostasis in diet-induced obese male mice
Ontology highlight
ABSTRACT:
INSTRUMENT(S): Orbitrap Exploris 480
ORGANISM(S): Mus Musculus (mouse)
TISSUE(S): Quadriceps, Brain, Liver
DISEASE(S): Obesity
SUBMITTER: 
Natalie Krahmer
LAB HEAD: Natalie Krahmer
PROVIDER: PXD046256 | Pride | 2024-01-17
REPOSITORIES: Pride
Similar Datasets
Project description:Insulin and IGF-1 receptors (IR/IGF1R) are highly homologous and share similar signaling systems, but each has a unique physiological role, with IR primarily regulating metabolic homeostasis and IGF1R regulating mitogenic control and growth. Here, we show that replacement of a single amino acid at position 973, just distal to the NPEY motif in the intracellular juxtamembrane region, from leucine, which is highly-conserved in IRs, to phenylalanine, the highly-conserved homologous residue in IGF1Rs, results in decreased IRS-1-PI3K-Akt-mTORC1 signaling and increased of Shc-Gab1-MAPK-cell cycle signaling. As a result, cells expressing L973F-IR exhibit decreased insulin-induced glucose uptake, increased cell growth and impaired receptor internalization. Mice with knockin of the L973F-IR show similar alterations in signaling in vivo, and this leads to decreased insulin sensitivity, a modest increase in growth and decreased weight gain when challenged with high-fat diet. Thus, leucine973 in the juxtamembrane region of the IR acts is a crucial residue differentiating IR signaling from IGF1R signaling.
2022-12-21 | PXD038649 | Pride
Project description:We demonstrate that the ketogenic diet a low carbohydrate diet can induce fibrosis and NASH regardless of body weight loss compared to high-fat diet (HFD) fed mice. KD-fed mice develop severe hepatic injury, inflammation, and steatosis. In addition, KD increases IL-6-JNK signaling and aggravates diet induced-glucose intolerance and hepatic insulin resistance compared to HFD. Notably, pharmacological inhibition of IL-6 and JNK reverses KD‐induced glucose intolerance and restores insulin sensitivity.
2023-01-31 | GSE218025 | GEO
Project description:Despite a high degree of homology, insulin and IGF-1 receptors (IR/IGF1R) mediate distinct cellular and physiological functions. Here, using chimeric and site-mutated receptors, we demonstrate how domain differences between IR and IGF1R contribute the distinct functions of these receptors. Receptors with the intracellular domain of IGF1R show increased activation of Shc and Gab-1 and more potent regulation of genes involved in proliferation, corresponding to its higher mitogenic activity. Conversely, receptors with the intracellular domain of IR display higher IRS-1 phosphorylation, stronger regulation of genes in metabolic pathways and more dramatic glycolytic responses to hormonal stimulation. We generated mouse brown preadipocytes in which both insulin and IGF-1 receptors (IR and IGF1R) had been genetically inactivated using Cre-lox recombination. These IR and IGF1R DKO cells were then reconstituted with wild-type mouse IR, IGF1R, or one of two chimeric receptors: IR/IGF1R with the IR extracellular domain (ECD) fused to the IGF1R transmembrane and intracellular domains (ICD) and IGF1R/IR with the ECD of IGF1R fused to the ICD domains of IR. Three independent clones for each line were used for the study. For expression analysis, we serum-starved the preadipocytes clones overnight and stimulated cells with 100 nM insulin, IGF-1 or vehicle for 6 h, and subjected the cellular RNA to analysis using Affymetrix Mouse Gene 2.0 ST arrays.
2016-07-01 | E-GEOD-81921 | biostudies-arrayexpress
Project description:The global prevalence of obesity is increasing across age and gender. The rising burden of obesity in young people contributes to the early emergence of type 2 diabetes. Having one parent obese is an independent risk factor for childhood obesity. While the detrimental impact of diet-induced maternal obesity on offspring is well established, the extent of the contribution of obese fathers is unclear, as is the role of non-genetic factors in the casual pathway. Here we show that paternal high fat diet exposure programmed β-cell âdysfunctionâ in their F1 female offspring. Chronic high fat diet consumption in Sprague Dawley fathers led to increased body weight, adiposity, impaired glucose tolerance and insulin sensitivity. Relative to controls, their female offspring had lower body weight at day-1, increased pubertal growth rate, impaired insulin secretion and glucose tolerance, in the absence of obesity or increased adiposity. Paternal high fat diet was observed to alter gene expression of pancreatic islet genes in adult female offspring (P < 0.001); affected functional clusters includes calcium ion binding, insulin, apoptosis, Wnt and cell cycle organ/system development. This is the first reported study in mammals describing non-genetic, intergenerational transmission of metabolic sequelae of high fat diet from father to offspring. These findings support a role of fathers in metabolic programming of offspring and form a framework for further studies. F0 founders were male Sprague Dawley rats, divided into two groups, high fat (HF) and control. The HF fathers were given commercially prepared high-fat pellets (43% as fat); while the controls ate standard laboratory chow (9% as fat). The two groups of fathers had distinct phenotype; the HF fathers were significantly heavier with increased adiposity, they were also glucose intolerant and insulin resistant. At 15 weeks of age, fathers were mated with normal females consuming chow, to generate the F1 offspring. Only female offspring were studied. Female offspring were weaned unto standard laboratory chow at 3 weeks. At 6 and 12 weeks, intraperitoneal glucose tolerance test (IpGTT) was performed to measure blood glucose and insulin profile; at 11 weeks, intraperitoneal insulin tolerance test was done. The body weight and adiposity of these offspring were not different between the two groups. The HF offspring had glucose intolerance and impaired glucose-induced insulin response, mainly at the acute phase, observed since 6 weeks. The IpITT was not different between groups. At 13 weeks, islets were harvested from the two groups of offspring.
2010-10-21 | E-GEOD-19877 | biostudies-arrayexpress
Project description:Insulin analogues are designed to improve the pharmacokinetic parameters compared to regular human insulin. This provides a sustained control of blood glucose levels in diabetic patients. All novel insulin analogues are tested for their mitogenic side effects, however these assays do not take into account the molecular mode-of-action of different insulin analogues. Insulin analogues can bind the insulin receptor (INSR) and the insulin-like growth factor-1 receptor (IGF1R) with different affinities and consequently will activate different downstream signaling pathways. Here we used a panel of MCF7 human breast cancer cell lines that selectively express either one of the isoforms of the INSR (IRA or IRB) or the IGF1R. We sought to study the role of the different receptors (IRA, IRB and IGF1R) in the mitogenic signaling of insulin-like molecules (including insulin, glargine, X10 (or AspB10) and IGF1). MCF7 IRA, MCF7 IRB or MCF7 IGF1R cells (as described in Arch Toxicol. 2014 Apr;88(4):953-66. doi: 10.1007/s00204-014-1201-2. Epub 2014 Jan 25.) were cultured in RPMI supplemented with 5% (v/v) CDFBS (Hyclone) and used for experiments. Cells have been exposed for 1 or 6 hours to 10 nM of the indicated insulin-like molecule. As a control sample a vehicle stimulation was performed that contained everything except the active compound.
2015-01-29 | E-GEOD-65398 | biostudies-arrayexpress
Project description:Insulin analogues are designed to improve the pharmacokinetic parameters compared to regular human insulin. This provides a sustained control of blood glucose levels in diabetic patients. All novel insulin analogues are tested for their mitogenic side effects, however these assays do not take into account the molecular mode-of-action of different insulin analogues. Insulin analogues can bind the insulin receptor (INSR) and the insulin-like growth factor-1 receptor (IGF1R) with different affinities and consequently will activate different downstream signaling pathways. Here we used a panel of MCF7 human breast cancer cell lines that selectively express either one of the isoforms of the INSR (IRA or IRB) or the IGF1R. We sought to study the role of the different receptors (IRA, IRB and IGF1R) in the mitogenic signaling of insulin-like molecules (including insulin, glargine, X10 (or AspB10) and IGF1).
2015-01-29 | GSE65398 | GEO
Project description:Adipose tissue dysfunction in obese humans is associated with disrupted metabolic homeostasis, insulin resistance, and type 2 diabetes mellitus (T2DM). In a mouse model that has preserved insulin sensitivity despite increased adiposity, we used unbiased three-dimensional integration of proteome profiles, metabolic profiles, and gene regulatory networks to understand adipose tissue proteome-wide changes and their metabolic implications. Multiple-dimensional liquid chromatography tandem mass spectrometry and extended multiplexing TMT labeling (24 biological samples) was used to analyze proteomes of epididymal adipose tissues isolated from wildtype (Csf2+/+) and GM-CSF driven dendritic cell deficient (Csf2-/-) mice that were fed low fat, high fat, or high fat plus cholesterol diets for 8 weeks. The peripheral metabolic health (as measured by body weight, adiposity, plasma fasting glucose, insulin, triglycerides, phospholipids, total cholesterol levels, and glucose and insulin tolerance tests) deteriorated with diet for both genotypes, while mice lacking Csf2 were protected from insulin resistance. Regardless of diet, 30, mostly mitochondrial metabolism proteins participating in amino acid and branched chain amino acid pathways were altered, between Csf2-/- and Csf2+/+ mice. Tissue DHTKD1 levels were >4-fold upregulated and plasma 2-aminoadipoate (2-AA) levels were >2 fold reduced in Csf2-/- mice. GM-CSF driven dendritic cells play a detrimental role in insulin sensitivity via lysine metabolism involving Dhtkd1/2-AA axis.
2018-08-06 | PXD008660 | Pride
Project description:Activation of protein kinase C epsilon (PKCε) in the liver has been widely associated with hepatic insulin resistance. PKCε is proposed to inhibit insulin signalling through phosphorylation of the insulin receptor. We have tested this directly by breeding PKCε floxed mice with mice expressing Cre recombinase under the control of the cytomegalovirus, albumin or adiponectin promoters to generate global, liver- and adipose tissue-specific PKCε knockout (KO) mice. Global deletion of PKCε recapitulated the benefits for diet-induced glucose intolerance that we previously described using conventional PKCε KO mice. However, we did not detect PKCε-dependent alterations in hepatic insulin receptor phosphorylation. Furthermore, liver-specific KO mice were not protected against diet-induced glucose intolerance or insulin resistance determined by euglycemic clamp. In contrast, adipose tissue-specific KO mice exhibited improved glucose tolerance and mildly increased hepatic triglyceride storage, but no change in liver insulin sensitivity. Phosphoproteomic analysis of insulin signalling in PKCε KO adipocytes revealed no defect in the canonical INSR/AKT/mTOR pathways. However, PKCε KO resulted in changes in phosphorylation of several proteins associated with the endosome and cell junctions suggesting regulation in secretory pathways and a potential role of PKCε in endocrine function. Indeed, RNA-seq analysis revealed adipose-tissue PKCε-dependent changes in the hepatic expression of several genes linked to glucose homeostasis and hepatic lipid metabolism. The primary effect of PKCε on glucose homeostasis is therefore not exerted directly in the liver as currently assumed. However, PKCε in adipose tissue modulates glucose tolerance and is involved in crosstalk with the liver that affects gene expression and lipid accumulation.
2018-10-04 | PXD010212 | Pride
Project description:From Peterson et. al. 2018: SIRT3 is an NAD+-dependent mitochondrial protein deacetylase purported to influence metabolism through post-translational modification of metabolic enzymes. Fuel-stimulated insulin secretion, which involves mitochondrial metabolism, could be susceptible to SIRT3-mediated effects. We used CRISPR/Cas9 technology to manipulate SIRT3 expression in b-cells, resulting in wide-spread, SIRT3dependent changes in acetylation of key metabolic enzymes, but with no appreciable changes in glucose- or pyruvate-stimulated insulin secretion, or in metabolomic profile during glucose stimulation. Moreover, these broad changes in the SIRT3-targeted acetylproteome did not affect responses to nutritional or ER stress conditions. We also studied mice with global SIRT3 knockout fed either standard chow (STD) or high- fat/high-sucrose (HFHS) diets. Only when chronically fed a HFHS diet do SIRT3 KO animals exhibit a modest reduction in insulin secretion. We conclude that broad changes in mitochondrial protein acetylation in response to manipulation of SIRT3 are not sufficient to cause changes in islet function or metabolism.
2018-06-21 | PXD009509 | Pride
Project description:The global prevalence of obesity is increasing across age and gender. The rising burden of obesity in young people contributes to the early emergence of type 2 diabetes. Having one parent obese is an independent risk factor for childhood obesity. While the detrimental impact of diet-induced maternal obesity on offspring is well established, the extent of the contribution of obese fathers is unclear, as is the role of non-genetic factors in the casual pathway. Here we show that paternal high fat diet exposure programmed M-NM-2-cell M-bM-^@M-^XdysfunctionM-bM-^@M-^Y in their F1 female offspring. Chronic high fat diet consumption in Sprague Dawley fathers led to increased body weight, adiposity, impaired glucose tolerance and insulin sensitivity. Relative to controls, their female offspring had lower body weight at day-1, increased pubertal growth rate, impaired insulin secretion and glucose tolerance, in the absence of obesity or increased adiposity. Paternal high fat diet altered the expression of 211 pancreatic islet genes in adult female offspring (P < 0.001); genes belonged to 8 functional clusters, including calcium ion binding, primary metabolic processes and ATP binding, and organ/system development. Broader KEGG pathway analysis of 2014 genes differentially expressed at the P < 0.01 level further demonstrated involvement of insulin and calcium signaling, and MAPK pathways. This is the first reported study in mammals describing non-genetic, intergenerational transmission of metabolic sequelae of high fat diet from father to offspring. These findings support a role of fathers in metabolic programming of offspring and form a framework for further studies. F0 founders were male Sprague Dawley rats, divided into two groups: high fat (HF) and control. The HF fathers were given commercially prepared high-fat pellets (43% as fat), while the controls ate standard laboratory chow (9% as fat). The two groups of fathers had distinct phenotypes; the HF fathers were significantly heavier with increased adiposity, and they were also glucose intolerant and insulin resistant. At 15 weeks of age, fathers were mated with normal females consuming chow to generate the F1 offspring. Only female offspring were studied. Female offspring were weaned unto standard laboratory chow at 3 weeks. At 6 and 12 weeks, an intraperitoneal glucose tolerance test (IpGTT) was performed to measure blood glucose and insulin profile; at 11 weeks, an intraperitoneal insulin tolerance test was done. The body weight and adiposity of these offspring were not different between the two groups. The HF offspring had glucose intolerance and impaired glucose-induced insulin response, mainly at the acute phase, observed since 6 weeks. The IpITT was not different between groups. At 14 weeks, fat was harvested from the two groups of offspring.
2014-01-20 | E-GEOD-33551 | biostudies-arrayexpress