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The transcription factor IRF-5 is an essential metabolic checkpoint in CD8 T cells during chronic infection

GSE292794 Mus musculus Expression profiling by high throughput sequencing 8 samples Submitted 2025/05/01 Platform GPL19057
Summary
Numerous transcription factors are involved in promoting an intricate gene expression program that leads to CD8 T cell exhaustion. Here, we found that the transcription factor IRF-5 is involved in limiting functional exhaustion of murine CD8 T cells by regulating the cell cycle and contributing to sustaining the mitochondrial functions and oxidative phosphorylation during the chronic stage of LCMV Cl13 infection. CD8 T cells lacking IRF-5 display reduced survival capacity and show increased signs of functional exhaustion during the chronic stage of infection. IRF-5-deficiency also resulted in a severely defective lipid metabolism, in an increased mitochondrial ROS production, and in the reduced capacity to produce ATP. Additionally, we observed increased lipid peroxidation in CD8 T cells lacking IRF-5, when compared with WT cells. These findings identify IRF-5 as a pivotal metabolic checkpoint in CD8 T cells during the chronic stages of infection and highlight its role in protecting cells from lipid peroxidation.
Published in
Transcription factor IRF-5 regulates lipid metabolism and mitochondrial function in murine CD8(+) T-cells during viral infection
Mai LT, Swaminathan S, Nguyen TH et al. · The EMBO journal 2025 · PMID 40494997 · doi:10.1038/s44318-025-00485-2
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Also filed as BioProject PRJNA1241265 and SRA study SRP572819. Searching any of these in the dataset finder brings you back here.

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