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Chronic treatment with glucagon-like peptide-1/glucagon receptor co-agonist causes weight-loss independent improvements in hepatic steatosis

ABSTRACT: Chronic treatment with glucagon-like peptide-1/glucagon receptor co-agonist causes weight-loss independent improvements in hepatic steatosis

PROVIDER: PRJNA1019376 | ENA |

REPOSITORIES: ENA

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Chronic treatment with glucagon-like peptide-1/glucagon receptor co-agonist causes weight-loss independent improvements in hepatic steatosis

Project description:Co-agonists at the glucagon-like peptide-1/glucagon receptors (GLP1R/GCGR) show promise as treatments for metabolic dysfunction-associated steatotic liver disease (MASLD). Unlike GLP1, glucagon directly acts on the liver to reduce fat content. To date most metabolic studies have looked at heavily GLP1R-biased co-agonists and have not distinguished weight-loss versus weight loss-independent effects. We demonstrate that 24 days’ treatment with Dicretin, a GLP1/GCGR co-agonist with high potency at the GCGR, in mice with hepatic steatosis secondary to diet-induced obesity leads to superior reduction of hepatic lipid content when compared to Semaglutide or equivalent weight loss by calorie restriction. Hepatic transcriptomic and metabolomic profiling demonstrated many changes that were unique to Dicretin-treated mice: some known targets of glucagon signalling and others with as yet unclear physiological significance. Our study supports the development of GLP1/GCGR co-agonists for treatment of MASLD and related conditions.

2024-06-11 | GSE243681 | GEO

BI 456906: a dual glucagon-like peptide-1/glucagon agonist promoting bodyweight reduction

Project description:Glucagon and glucagon-like peptide-1 (GLP-1) are hormones involved in energy homeostasis. GLP-1 receptor (GLP-1R) agonism reduces food intake and delays gastric emptying, and glucagon receptor (GCGR) agonism increases energy expenditure by thermogenesis. BI 456906 is a subcutaneous, once-weekly injectable dual GLP-1R/GCGR agonist in development for the treatment of obesity or non-alcoholic steatohepatitis. Here we show that BI 456906 is a potent dual agonist with an extended half-life in human plasma. Key GLP-1R-mediated mechanisms of reduced food intake, delayed gastric emptying and improved glucose tolerance were confirmed in GLP-1R knockout mice. GCGR activity was confirmed by reduced plasma amino acids, increased hepatic expression of nicotinamide N-methyltransferase and increased energy expenditure. BI 456906 produced greater bodyweight reductions than maximally efficacious semaglutide doses and modulated gene expression, including genes involved in amino acid metabolism. BI 456906 is a potent dual agonist that produces bodyweight-lowering effects through both GLP-1R and GCGR agonism.

2022-12-09 | GSE211105 | GEO

BI 456906: a dual glucagon-like peptide-1/glucagon agonist promoting bodyweight reduction

Project description:BI 456906: a dual glucagon-like peptide-1/glucagon agonist promoting bodyweight reduction

| PRJNA868929 | ENA

Hepatic transcriptomic changes following equivalent weight loss by calorie restriction or vertical sleeve gastrectomy in mice with hepatic steatosis

Project description:Sleeve gastrectomy (VSG) leads to improvement in hepatic steatosis, associated with weight loss. The aims of this study were to investigate whether VSG leads to weight-loss independent improvements in liver steatosis in mice with diet-induced obesity (DIO); and to transcriptomically profile hepatic changes in mice undergoing VSG. Methods: Mice with DIO were treated with VSG, sham surgery with subsequent food restriction to weight-match to the VSG group (Sham-WM), or sham surgery with return to unrestricted diet (Sham-Ad lib). Hepatic transcriptomics were investigated at the end of the study period and treatment groups were compared with mice undergoing sham surgery only (Sham-Ad lib). Results: VSG led to much greater improvement in liver steatosis than Sham-WM (liver triglyceride mg/mg 2.5 ± 0.1, 2.1 ± 0.2, 1.6 ± 0.1 for Sham-AL, Sham-WM and VSG respectively; p=0.003). Homeostatic model assessment of insulin resistance was improved following VSG only (51.2 ± 8.8, 36.3 ± 5.3, 22.3 ± 6.1 for Sham-AL, Sham-WM and VSG respectively; p=0.03). The glucagon-alanine index, a measure of glucagon resistance, fell with VSG but was significantly increased in Sham-WM (9.8 ± 1.7, 25.8 ± 4.6 and 5.2 ± 1.2 in Sham Ad-lib, Sham-WM and VSG respectively; p=0.0003). Genes downstream of glucagon receptor signalling which govern fatty acid synthesis (Acaca, Acacb, Me1, Acyl, Fasn and Elovl6) were downregulated following VSG but upregulated in Sham-WM. Conclusion: Changes in glucagon sensitivity may contribute to weight-loss independent improvements in hepatic steatosis following VSG.

2024-03-13 | GSE225843 | GEO

Dietary protein defends lean mass and maintains metabolic benefits of glucagon receptor agonist G108 in mice

Project description:Glucagon has long been proposed as a component of multi-agonist obesity therapeutics due to its ability to induce energy expenditure and cause weight loss. However, chronic glucagon-receptor agonism has been associated with a reduction in circulating amino acids and loss of lean mass. Importantly, it is currently not known whether the metabolic benefits of glucagon can be maintained in contexts that permit the defence of lean mass.

2024-09-09 | GSE273658 | GEO

Generalized reversal of glial and neurovascular cell transcriptomic aging signatures by glucagon-like peptide-1 receptor agonist

Project description:Pharmacological reversal of brain aging is a long-sought yet challenging strategy for the prevention and treatment of age-related neurodegeneration, due to the diverse cell types and complex cellular pathways impacted by the aging process. Recently, we demonstrated that brain endothelial cell (EC) aging is transcriptomically and functionally reversible by treatment with exenatide, a glucagon-like peptide-1 receptor (GLP-1R) agonist (GLP-1RA)(1). Here, we report that the reversal of transcriptomic aging signatures by GLP-1RA treatment is a generalized phenomenon in multiple major brain cell types, including glial (including astrocyte (AC), oligodendrocyte precursor cell (OPC), microglia (MG) and oligodendrocyte (OLG)) and mural (i.e. pericyte (PC) and smooth muscle cell (SMC)) cells. The age-related expression changes ameliorated by GLP-1RA encompass cell type-shared and specific functional pathways implicated in aging and neurodegeneration. These results show the feasibility of brain ageing reversal by pharmacological means, provide mechanistic insights into the neurological benefits of GLP-1RAs in diabetic patients(2, 3), and imply that GLP-1RA may be a generally applicable pharmacological intervention for non-diabetic patients at risk of age-related neurodegeneration.

2021-01-31 | GSE160991 | GEO

Differential effects of a glucagon-like peptide 1 receptor agonist in NAFLD and in response to hepatectomy

Project description:Differential effects of a glucagon-like peptide 1 receptor agonist in NAFLD and in response to hepatectomy

| PRJNA490142 | ENA

Generalized reversal of glial and neurovascular cell transcriptomic aging signatures by glucagon-like peptide-1 receptor agonist

Project description:Generalized reversal of glial and neurovascular cell transcriptomic aging signatures by glucagon-like peptide-1 receptor agonist

| PRJNA675086 | ENA

Next Generation Sequencing of DIO Liver steatosis DMSO vs NCT (HNF4a agonist)

Project description:Next Generation Sequencing of DIO Liver steatosis DMSO vs NCT (HNF4a agonist)

| PRJNA722504 | ENA

Combination of an ACLY inhibitor with a GLP-1R agonist exerts additive benefits on NASH and hepatic fibrosis [Fibrosis panel]

Project description:Increased liver de novo lipogenesis (DNL) is a hallmark of nonalcoholic steatohepatitis (NASH). A key enzyme controlling DNL upregulated in NASH is ATP citrate lyase (ACLY). In mice, inhibition of ACLY reduces liver steatosis, ballooning and fibrosis and inhibits activation of hepatic stellate cells. Glucagon like peptide-1 receptor (GLP-1R) agonists lower body mass, insulin resistance and steatosis without improving fibrosis. Here, we find that combining an inhibitor of liver ACLY, bempedoic acid, and the GLP-1R agonist liraglutide reduces liver steatosis, hepatocellular ballooning, and hepatic fibrosis in a mouse model of NASH. Liver RNA analyses revealed additive downregulation of pathways that are predictive of NASH resolution, reductions in the expression of prognostically significant genes compared to clinical NASH samples, and a predicted gene signature profile that supports fibrosis resolution. These findings support further investigation of this combinatorial therapy to treat obesity, insulin resistance, hypercholesterolemia, steatohepatitis, and fibrosis in people with NASH.

2023-08-09 | GSE240406 | GEO

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