Therapeutic PYY/GLP-1 receptor co-agonism in obese-diabetic mice
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA674568 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR12978900.fastq.gz | Fastqsanger.gz | |||
| SRR12978901.fastq.gz | Fastqsanger.gz | |||
| SRR12978902.fastq.gz | Fastqsanger.gz | |||
| SRR12978903.fastq.gz | Fastqsanger.gz | |||
| SRR12978904.fastq.gz | Fastqsanger.gz |
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Project description:Therapeutic PYY/GLP-1 receptor co-agonism in obese-diabetic mice synergistically activates discrete hypothalamic and brainstem neuronal circuitries for weight reduction, increased insulin sensitization, recovery of pancreatic ß-cell function and diabetes remission. GLP1-R agonism (IP118) and PYY-2R agonism (PY115) in combination yield surprising synergistic effects on energy homeostasis in mammals. To better understand the genesis of these effects, RNAseq profiling was performed on key brain regions following an acute dose of IP118+PY115.
2021-03-01 | GSE160802 | GEO
Project description:Early drivers of Type 2 diabetes mellitus (T2D) include ectopic fat accumulation, especially in the liver, that significantly impairs insulin sensitivity. In a T2D setting, GLP-1R/GCGR dual agonists have been shown to reduce glycaemia, body weight and hepatic steatosis. We utilized cotadutide, a well characterized GLP-1R/GCGR dual-agonist, to demonstrate improved insulin sensitivity during hyperinsulinemic euglycemic clamp following sub-chronic dosing in male, diet-induced obese mice. Phosphoproteomic analyses of insulin stimulated liver from cotadutide treated diet-induced obese (DIO) mice identified novel phosphorylation sites on key insulin signalling pathway proteins associated with improved insulin sensitivity. Cotadutide or GCGR monoagonist treatment also resulted in specific increased brown adipose tissue (BAT) insulin-stimulated glucose uptake, while GLP-1R monoagonist only showed a weak effect. BAT from cotadutide treated mice had induction of UCP-1 protein, increased mitochondrial area and a transcriptomic profile of increased fat oxidation and mitochondrial activity. Finally, the cotadutide-induced improvement in insulin sensitivity was associated with reduced insulin secretion from isolated pancreatic islet β-cells indicating reduced insulin secretory demand. Thus, GLP-1R/GCGR dual agonism provides multimodal efficacy to decrease hepatic steatosis and consequently improve insulin sensitivity, in concert with recovery of endogenous β-cell function and reduced insulin demand. This substantiates GLP-1R/GCGR dual-agonism as a novel and effective T2D treatment
2025-03-28 | PXD057744 | Pride
Project description:Tirzepatide (LY3298176), a dual GIP and GLP-1 receptor agonist, has been shown to deliver enhanced glycemic control and superior weight loss compared to a selective GLP-1 receptor (GLP-1R) agonist in patients with type 2 diabetes mellitus. However, the mechanism by which tirzepatide improves efficacy and how GIP receptor (GIPR) agonism contributes to the therapy is not fully understood. Here, hyperinsulinemic-euglycemic clamp studies were used to show that tirzepatide is a highly effective insulin sensitizer, improving insulin sensitivity in obese mice to a greater extent than GLP-1R agonism. To determine if GIPR agonism contributes to the insulin sensitization, we compared the effect of tirzepatide in obese wild-type and Glp-1r null mice. In the absence of GLP-1R induced weight loss, tirzepatide improved systemic insulin sensitivity by enhancing glucose disposal in WAT. To corroborate these results, chronic treatment with a long-acting GIPR agonist (LAGIPRA) was also found to enhance insulin sensitivity by increasing insulin stimulated glucose uptake in WAT. Interestingly, the effect of tirzepatide and LAGIPRA on insulin sensitivity was associated with reduced branched chain amino and keto acids in the circulation. Whole-body insulin sensitization was associated with pronounced upregulation of genes associated with the catabolism of glucose, lipid and BCAAs in brown adipose tissue. Together, our studies show that tirzepatide improved insulin sensitivity in a weight-dependent and -independent manner. These results highlight how GIPR agonism contributes to the therapeutic profile of dual GIP and GLP-1 receptor agonism, offering mechanistic insights into the clinical efficacy of tirzepatide.
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Project description:Glucagon-like peptide 1 receptor (GLP-1R) agonists are used along with ethanol consumption, but their interactions are not understood. Our aim was to determine the effects of GLP-1R agonism on the liver in mouse models of high ethanol consumption. We identified that GLP-1R agonism reduced ethanol consumption, mitigated ethanol-induced upregulation of several liver metabolizing enzymes, including Cyp2e1 and also reduced Cyp2e1 independent of ethanol intake. As expected from a reduction in Cyp2e1, GLP-1R agonism resulted in increased blood ethanol levels. This occurred after a single dose of ethanol when given by gavage, and by the intraperitoneal route. This suggests that GLP-1R agonism can reduce ethanol-mediated hepatotoxicity despite continued ethanol consumption and elevate blood alcohol levels
2025-09-18 | GSE291407 | GEO
Project description:Glucose-dependent insulinotropic polypeptide receptor (GIPR) and glucagon-like peptide 1 receptor (GLP-1R) are expressed in the central nervous system (CNS) and regulate food intake. Here, we demonstrate that a peptide-antibody conjugate that blocks GIPR while simultaneously activating GLP-1R (GIPR-Ab/GLP-1) requires both CNS GIPR and CNS GLP-1R for additive effects on body weight loss in obese, primarily male, mice. Moreover, dulaglutide produces greater weight loss in CNS GIPR KO mice compared to WT mice, and the extent of weight loss achieved with dulaglutide + GIPR-Ab is attenuated in CNS GIPR KO mice. WT mice treated with GIPR-Ab/GLP-1 or CNS GIPR KO mice exhibit similar changes in gene expression related to tissue remodeling, lipid metabolism, and inflammation in white adipose tissue and liver. Moreover, GIPR-Ab/GLP-1 is detected in circumventricular organs in the brain and activates c-FOS in downstream neural substrates involved in appetite regulation. Hence, both CNS GIPR and GLP-1R signaling are required for the full effect of a GIPR-Ab/GLP-1 peptide-antibody conjugate, with loss of CNS GIPR activity potentiating the actions of GLP-1R agonism.
2025-04-29 | GSE293291 | GEO
Project description:Advancements in unimolecular drugs co-targeting the glucagon-like peptide-1 receptor (GLP-1R) and glucose-dependent insulinotropic polypeptide receptor (GIPR) have demonstrated remarkable clinical efficacy in treating type 2 diabetes (T2D) and obesity. However, the paradoxical ability of both GIPR agonism and antagonism to complement GLP-1R agonism underscores the need to elucidate molecular mechanisms underlying incretin receptor pharmacology and crosstalk. Here, we show that GLP-1 promotes heterodimerization via interactions between TM4 of GLP-1R and TM1/2 of GIPR. Phosphoproteomics profiling and molecular dynamics simulations reveal that dimerizing and non-dimerizing GLP-1R agonists differentially engage with GLP-1R and elicit distinct regulation of downstream signaling networks in human islets. Co-expression of GLP-1R and GIPR amplifies GIPR-mediated signaling in a β-arrestin-dependent manner, while GLP-1R-mediated signaling is suppressed by GIPR expression. Additionally, upregulation or downregulation of GIPR expression was associated with adiposity and diabetic traits, respectively. Collectively, these findings uncover mechanisms underlying the interplay between GLP-1R and GIPR and highlight heterodimerization as an innovative strategy for incretin-based therapies and personalized treatment.
2026-05-13 | PXD063931 | Pride
Project description:Drugs to improve obesity-linked metabolic dysfunction are on the rise, with GLP-1:GIP co-agonism being effective in the management of obesity and type 2 diabetes, and with Lanifibranor (Lani), a nuclear acting small molecule triple agonist at the peroxisome proliferator-activated receptors alpha, gamma and delta (PPAR𝛼,𝛾,𝛿) being in phase 3 clinical trials for the treatment of metabolic dysfunction-associated steatohepatitis. Seeking to further improve the metabolic efficacy of GLP-1:GIP co-agonism, we here report the design and preclinical evaluation of an unimolecular quintuple agonist, which synergistically combines the body weight and blood glucose lowering effects of GLP-1:GIP co-agonism with the insulin sensitizing effects of Lani through its targeted delivery into only cells that express the receptor for either GIP or GLP-1. In vitro, GLP-1:GIP:Lani is indistinguishable from its GLP-1:GIP backbone in GIPR and GLP-1R signaling and equally stimulates insulin secretion in isolated murine islets. In vivo, however, GLP-1:GIP:Lani is much superior to GLP-1:GIP co-agonism, Semaglutide or Lani to decrease body weight, food intake, and hyperglycemia in obese and insulin resistant mice through synergistic incretin and PPAR action in key glucoregulatory tissues. The superior metabolic action of GLP-1:GIP:Lani is demonstrated in mice with genetic (db/db) and diet-induced obesity (DIO), is accelerated in DIO mice with adipose-specific overexpression of GIPR and is absent in DIO double-incretin receptor knock-out mice. Collectively, we show that GLP-1:GIP:Lani outperforms GLP-1:GIP co-agonism and Lani to further improve energy and glucose metabolism, suggesting that this novel quintuple polyagonist holds unprecedented therapeutic value to treat obesity and type 2 diabetes.
2026-02-14 | PXD062990 | Pride
Project description:Drugs to improve obesity-linked metabolic dysfunction are on the rise, with GLP-1:GIP co-agonism being effective in the management of obesity and type 2 diabetes, and with Lanifibranor (Lani), a nuclear acting small molecule triple agonist at the peroxisome proliferator-activated receptors alpha, gamma and delta (PPAR , , ) being in phase 3 development for the treatment of metabolic dysfunction-associated steatohepatitis. Seeking to further improve the metabolic efficacy of GLP-1:GIP co-agonism, we here report the design and preclinical evaluation of an unimolecular quintuple agonist, which synergistically combines the body weight and blood glucose lowering effects of GLP-1:GIP co-agonism with the insulin sensitizing effects of Lani through its targeted delivery into only cells that express the receptor for either GIP or GLP-1. In vitro, GLP-1:GIP:Lani is indistinguishable from its GLP-1:GIP backbone in GIPR and GLP-1R signaling and equally stimulates insulin secretion in isolated murine islets. In vivo, however, GLP-1:GIP:Lani is much superior to GLP-1:GIP co-agonism or Semaglutide to decrease body weight, food intake, and hyperglycemia in obese and insulin resistant mice through synergistic incretin and PPAR action in key glucoregulatory tissues. The superior metabolic action of GLP-1:GIP:Lani is demonstrated in mice with genetic (db/db) and diet-induced obesity (DIO), is accelerated in DIO mice with adipose-specific overexpression of GIPR and is absent in DIO double-incretin receptor knock-out mice. Collectively, our data suggest that this novel quintuple polyagonist holds unprecedented therapeutic value to treat obesity and type 2 diabetes.
2026-02-14 | GSE314029 | GEO
Project description:We investigate the effects of GLP-1 on diabetic cardiomyocytes (DCMs) model established by human induced pluripotent stem cells-derived cardiomyocytes (iPSC-CMs). Two subtypes of GLP-1, GLP-17-36 and GLP-19-36, were evaluated for their efficacy on hypertrophic phenotype, impaired calcium homeostasis and electrophysiological properties. RNA-seq was performed to reveal the underlying molecular mechanism of GLP-1. Our results demonstrated that GLP-17-36 and GLP-19-36 were able to ameliorate high glucose-induced hypertrophy phenotype and cardiac dysfunctions in DCM model based on iPSC-CMs. Our study provides a novel platform to unveil the cellular mechanisms of diabetic cardiomyopathy, which sheds light on discovering better targets for novel therapeutic interventions.
2022-07-01 | GSE197850 | GEO
Project description:Agonists and antagonists of the glucose-dependent insulinotropic polypeptide receptor (GIPR) enhance body weight loss induced by glucagon-like peptide-1 receptor (GLP-1R) agonism. However, while GIPR agonism decreases body weight and food intake in a GLP-1R-independent manner via GABAergic GIPR+ neurons, it remains unclear whether GIPR antagonism affects energy metabolism via a similar mechanism. Here we show that the body weight and food intake effects of GIPR antagonism are eliminated in mice with global loss of either Gipr or Glp-1r but are preserved in mice with loss of Gipr in either GABAergic neurons of the central nervous system or peripherin-expressing neurons of the peripheral nervous system. Single-nucleus RNA-sequencing shows opposing effects of GIPR agonism and antagonism in the dorsal vagal complex, with antagonism, but not agonism, closely resembling GLP-1R signalling. Additionally, GIPR antagonism and GLP-1R agonism both regulate genes implicated in synaptic plasticity. Collectively, we show that GIPR agonism and antagonism decrease body weight via different mechanisms, with GIPR antagonism, unlike agonism, depending on functional GLP-1R signalling.
2025-03-12 | GSE288514 | GEO