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RNA-seq Transcriptomic Analysis of 4-octyl itaconate Repressing Myogenic Differentiation

ABSTRACT: The 4-octyl itaconate O1_is a type of cell-permeable itaconate derivative. Studies have shown that with an anti-fibrotic effect in systemic sclerosis, the OI also affects osteoclast differentiation. The aim of this study was to explore the molecular mechanisms underlying the effects of OI on myoblast differentiation by RNA-seq analysis.

ORGANISM(S): Mus musculus

PROVIDER: GSE213991 | GEO | 2023/10/10

REPOSITORIES: GEO

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4-octyl itaconate inhibits aerobic glycolysis by targeting GAPDH to exert anti-inflammatory effects

Project description:Activated macrophages switch from oxidative phosphorylation to aerobic glycolysis, similar to the Warburg effect, presenting a potential therapeutic target in inflammatory disease. The endogenous metabolite itaconate has recently been reported to regulate macrophage function, but its precise mechanism is not fully understood. Here, we showed that 4-octyl itaconate (OI, a cell-permeable itaconate derivative) directly alkylated cysteine residue 22 on the glycolytic enzyme GAPDH and decreased its enzyme activity. Glycolytic flux analysis by U13C‐glucose tracing also provided evidence that OI generated a blockade of glycolytic flux at GAPDH. OI thereby downregulates aerobic glycolysis in activated macrophages, which is required for its anti-inflammatory effects. The anti-inflammatory effects of OI were replicated by heptelidic acid, 2-DG and reversed by increasing wild-type but not C22A mutant GAPDH expression. OI protected against lipopolysaccharide-induced lethality in vivo and significantly inhibited cytokine release. These findings showed that itaconate is a critical immunometabolite that exerts anti-inflammatory effects by targeting GAPDH to decrease aerobic glycolysis in macrophages.

2019-10-02 | MTBLS1140 | MetaboLights

4-Octyl itaconate as a metabolite derivative inhibits inflammation via alkylation of STING

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RNA-seq Transcriptomic Analysis of 4-octyl itaconate Repressing Myogenic Differentiation

Project description:RNA-seq Transcriptomic Analysis of 4-octyl itaconate Repressing Myogenic Differentiation

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Effect of 4-octyl itaconate on gene expression of dendritic cells

Project description:Here, we report that macrophage-derived itaconate exerts a significant suppressive effect on dendritic cell (DC) function. To delve deeper into the impact of itaconate on DCs, we treated bone marrow-derived dendritic cells with 4-OI, a derivative of itaconate, and conducted RNA-seq analysis. Gene-set enrichment analysis (GSEA) of 4-OI-treated DCs showed a general downregulation of innate immunity and immune-response pathways.

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