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

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

PROVIDER: PRJNA1142576 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR30057573_1.fastq.gz	Fastqsanger.gz
	SRR30057573_2.fastq.gz	Fastqsanger.gz
	SRR30057574_1.fastq.gz	Fastqsanger.gz
	SRR30057574_2.fastq.gz	Fastqsanger.gz
	SRR30057575_1.fastq.gz	Fastqsanger.gz

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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

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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.

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

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13C15N – Glucagon-based novel isotope dilution mass spectrometry method for measurement of glucagon metabolism in humans

Project description:Glucagon serves as an important regulatory hormone for regulating blood glucose concentrations with tight feedback control with insulin and glucose. There are critical gaps in our understanding of glucagon kinetics, pancreatic α cell function and intra-islet feedback network that are disrupted in type 1 diabetes. This is important for translational research applications of evolving dual-hormone (insulin+glucagon) closed-loop artificial pancreas algorithms and their usage in type 1 diabetes. Thus, it is important to accurately measure glucagon kinetics in vivo and to develop robust models of glucose-insulin-glucagon interplay that could inform next generation of artificial pancreas algorithms.

2022-06-09 | PXD028715 | Pride

Disruption of glucagon receptor increase α-cell glucagon expression and secretion beyond hyperplasia in zebrafish

Project description:Glucagon receptor (GCGR) is a potential target for diabetes therapy. Several emerging GCGR antagonism-based therapies are under pre-clinical and clinical development. However, the GCGR antagonism as well as GCGR deficient animal accompanied with α-cell hyperplasia and hyperglucagonemia, which may limit the application of GCGR antagonism. To better understand the physiological changes in the α cells during the GCGR disruption, we performed the single cell sequencing of α cells isolated from control and gcgr-/- zebrafish. We found that α cells in gcgr-/- zebrafish dramatically increased glucagon (both gcga and gcgb) expression, we also found that several transcriptional factors that regulate glucagon expression were also increased. Based on the sequencing data, we further experimentally confirmed that gcgr-/- up-regulated glucagon mRNA level by in situ hybridization, and the gcgr-/- increased glucagon promoter activity indicated by reporter line Tg(gcga: GFP). Moreover, our results also revealed that α cells increased glucagon granule population and glucagon level in gcgr-/- zebrafish. These data suggested that hyperglucagonemia in the organism of GCGR antagonism not only contributed by the α-cell hyperplasia but also contributed by the increased glucagon expression and secretion from α cells. Our study provided more comprehensive understanding of physiological changes of α-cell during the GCGR disruption.

2022-10-26 | GSE179894 | GEO

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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.

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Project description:Gut intraepithelial lymphocytes (IELs) are one of the few immune cell populations in the body that expresses glucagon-like 1 receptors (GLP-1R). To test the potential effects of GLP-1 on gut IEL function, we performed bulk RNA-seq on gut IELs isolated from C57BL/6J mice treated with anti-CD3 and with or without exendin-4 for 3 hours.

2022-08-29 | GSE202453 | GEO

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

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| PRJNA1019376 | ENA

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