Butyrate protects pancreatic beta cells from cytokine induced dysfunction
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA747813 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR15183763.fastq.gz | Fastqsanger.gz | |||
| SRR15183764.fastq.gz | Fastqsanger.gz | |||
| SRR15183765.fastq.gz | Fastqsanger.gz | |||
| SRR15183766.fastq.gz | Fastqsanger.gz | |||
| SRR15183767.fastq.gz | Fastqsanger.gz |
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Project description:Beta cell dysfunction, caused by metabolic and inflammatory stress, contributes to the development of type 2 diabetes. Butyrate, produced by the gut microbiota, has shown beneficial effects on glucose metabolism and may directly affect beta cell function, but the mechanisms are poorly described. The aim of this study was to investigate the effect of butyrate on IL-1β-induced β cell dysfunction. We showed that long-term exposure of mouse islets to non-cytotoxic concentrations of IL-1β impaired insulin secretion and content and reduced proliferation. This dysfunction was prevented when the islets were exposed to butyrate and butyrate alone also boosted insulin secretion. In contrast, butyrate further downregulated the proliferation. To get a better indication of mechanisms of actions we investigated the global mRNA expression profiles using RNA sequencing. Our results indicated that the protective effects of butyrate are associated with upregulation of secretion/transport-related genes and downregulation of inflammatory genes induced by IL-1β. In addition, several cell cycle related genes were strongly inhibited by butyrate. In conclusion, butyrate plays an essential role in supporting beta cell function under inflammatory conditions, suggesting a potential for therapeutic use in treatment and prevention of T2D.
2021-09-27 | GSE180317 | GEO
Project description:Pancreatic beta cell dysfunction caused by metabolic and inflammatory stress contributes to the development of type 2 diabetes (T2D). Butyrate, produced by the gut microbiota, has shown beneficial effects on glucose metabolism in animals and humans and may directly affect beta cell function, but the mechanisms are poorly described. The aim of this study was to investigate the effect of butyrate on cytokine-induced beta cell dysfunction in vitro. Mouse islets, rat INS-1E, and human EndoC-βH1 beta cells were exposed long-term to non-cytotoxic concentrations of cytokines and/or butyrate to resemble the slow onset of inflammation in T2D. Beta cell function was assessed by glucose-stimulated insulin secretion (GSIS), gene expression by qPCR and RNA-sequencing, and proliferation by incorporation of EdU into newly synthesized DNA. Butyrate protected beta cells from cytokine-induced impairment of GSIS and insulin content in the three beta cell models. Beta cell proliferation was reduced by both cytokines and butyrate. Expressions of the beta cell specific genes Ins, MafA, and Ucn3 reduced by the cytokine IL-1β were not affected by butyrate. In contrast, butyrate upregulated the expression of secretion/transport-related genes and downregulated inflammatory genes induced by IL-1β in mouse islets. In summary, butyrate prevents pro-inflammatory cytokine-induced beta cell dysfunction.
| S-EPMC8508700 | biostudies-literature
Project description:Butyrate, a gut microbial metabolite, has beneficial effects on glucose homeostasis and has become an attractive drug target for type 2 diabetes (T2D). Recently, we showed that butyrate protects pancreatic beta cells against cytokine-induced dysfunction. In this study, we explored the underlying mechanisms of butyrate action. Pancreatic islets were exposed to a non-cytotoxic concentration of interleukin 1β (IL-1β) for ten days to mimic the low-grade inflammation in T2D. An isoform-selective histone deacetylase 3 (HDAC3) inhibitor normalized IL-1β-reduced GSIS and insulin content similar to the effect of butyrate. In contrast, FFAR2/3 agonists failed to normalize IL-1β-induced impairment of GSIS and reduced insulin content. Butyrate, irrespective of IL-1β, inhibited HDAC activity and increased histone H3 and H4 acetylation by 3- and 10-fold, respectively. Genome-wide analysis of histone H3K27 acetylation (H3K27ac) revealed that butyrate mainly increased H3K27ac at promoter regions (~68 %), while H3K27ac peaks regulated by IL-1β were more equally distributed at promoters (~33 %), introns (~23 %) and intergenic regions (~23 %). Gene ontology analysis showed that butyrate increased IL-1β-reduced H3K27ac levels near several genes related to hormone secretion and reduced IL-1β-increased H3K27ac levels near genes associated with inflammatory responses . Butyrate alone increased H3K27ac near many genes related to MAPK signaling, hormone secretion and differentiation, and decreased H3K27ac at genes involved in cell replication. Together, these results suggest that butyrate prevents IL-1β-induced beta cell dysfunction by inhibition of HDACs resulting in changes in H3K27ac levels at genes relevant for beta cell function and inflammatory responses.
2023-12-07 | GSE233936 | GEO
Project description:Background & Aims: In obesity-associated non-alcoholic steatohepatitis (NASH), persistent hepatocellular damage and inflammation are key drivers of fibrosis, the main determinant of NASH-associated mortality. The short chain fatty acid butyrate can exert metabolic improvements and anti-inflammatory activities in NASH. However, its effects on NASH-associated liver fibrosis remains unclear. Methods: Putative antifibrotic effects of butyrate were studied in Ldlr-/-.Leiden mice fed an obesogenic NASH-inducing diet (HFD) containing 2.5% (w/w) butyrate for 38 weeks and compared to an HFD control group. Antifibrotic mechanisms of butyrate were further investigated in TGF-β-stimulated primary human hepatic stellate cells (HSC). Results: HFD-fed mice developed obesity, insulin resistance, increased levels of plasma leptin, adipose tissue inflammation, gut permeability, dysbiosis and NASH-associated fibrosis. Butyrate corrected hyperinsulinemia, lowered plasma leptin levels and attenuated adipose tissue inflammation, without affecting gut permeability or microbiota composition. Butyrate lowered plasma ALT and CK-18M30 and attenuated hepatic steatosis and inflammation. Butyrate inhibited fibrosis development as demonstrated by decreased hepatic collagen content and Sirius-red-positive area. In TGF-β-stimulated HSC, butyrate dose-dependently reduced collagen deposition and decreased procollagen1α1 and PAI-1 protein expression. Transcriptomic analysis and subsequent pathway and upstream regulator analysis revealed deactivation of specific non-canonical TGF-β signaling pathways RhoA/Rock and PI3K/AKT and other important pro-fibrotic regulators (e.g. YAP/TAZ and MYC) by butyrate, providing a potential rationale for its antifibrotic effects. Conclusions: Butyrate protects against the development of obesity and insulin resistance-associated NASH and liver fibrosis. These antifibrotic effects are at least in part attributable to a direct effect on collagen production in hepatic stellate cells, as a result of inhibiting non-canonical TGF-β signaling.
2021-12-21 | GSE179395 | GEO
Project description:KDM4B epigenetically protects against obesity and metabolic dysfunction
| PRJNA397224 | ENA
Project description:SARS-CoV2 infection leads to cardiac injury and dysfunction in 20-30% of hospitalized patients and higher rates of mortality in patients with pre-existing cardiovascular disease. Inflammatory factors released as part of the 'cytokine storm' are thought to play a critical role in cardiac dysfunction in severe COVID-19 patients. Here we use human cardiac organoid technology combined with high sensitivity phosphoproteomics and single nuclei RNA sequencing to identify inflammatory targets inducing cardiac dysfunction. This new pipeline allowed rapid progress and identification of putative therapeutics. We identify a novel interferon-gamma driven BRD4 (bromodomain protein 4)-fibrosis/iNOS axis as a key intracellular mediator of inflammation-induced cardiac dysfunction. This axis is therapeutically targetable using BRD4 inhibitors, which promoted full recovery of function in human cardiac organoids and prevented severe inflammation and death in a cytokine-storm mouse model. The BRD inhibitor INCB054329 was the most efficacious, and is a prime candidate for drug repurposing to attenuate cardiac dysfunction and improve COVID-19 mortality in humans.
2022-02-21 | PXD020994 | Pride
Project description:We report that BET inhibitor (I-BET762) protect against cytokine induced pancreatic beta-cell apoptosis and did RNA-Seq to determine global transcriptome changes with the drug.
2023-10-01 | GSE160573 | GEO
Project description:We aimed to study the impact of bacteria-derived metabolites in solid organ transplantation. The short-chain fatty acid butyrate was administered using a new drug-delivery method developed by Wang et al. (https://doi.org/10.1038/s41551-022-00972-5). This system is based on a micelle platform that carries and protects butyrate (ButM) from degradation in the upper gastrointestinal tract, to lower distal portions of the gut. Mice (adult B6 females) were treated for 21 days with ButM (100mg/mL) or 1x PBS. Splenic Ly6Chi CD11b+ monocytes were sorted for bulk RNAseq using the Takara SMART-Seq mRNA LP and Unique Dual Index kits. Libraries were sequenced using the Illumina NovaSeq 6000 platform.
2024-04-05 | E-MTAB-13931 | biostudies-arrayexpress
Project description:This SuperSeries is composed of the following subset Series: GSE15107: R1 mESC Exposed to Butyrate GSE15109: BG02 hESC Exposed to Butyrate GSE15110: H1 hESC Exposed to Butyrate Refer to individual Series
2009-03-04 | E-GEOD-15112 | biostudies-arrayexpress