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Persistent ER stress in macrophages fuels age-related inflammation and vulnerability to infection

GSE304706 Mus musculus Expression profiling by high throughput sequencing 8 samples Submitted 2026/08/08 Platform GPL24247
Summary
Aging is accompanied by a state of chronic, low-grade inflammation known as inflammaging that underlies increased susceptibility to infection and many age-related pathologies. Although macrophages are central to immune regulation and inflammation, the molecular mechanisms driving their age-associated dysfunction remain incompletely defined. Here, we performed bulk RNA-sequencing on FACS-sorted peritoneal macrophages from young and aged mice. Analysis of differentially expressed genes revealed that genes upregulated in aged macrophages were significantly enriched for pathways related to "response to interferon-beta" and "response to interferon-gamma". Further investigation of our RNA-seq data for upstream mediators of these genes showed that Stat1 was markedly upregulated in aged macrophages. These transcriptomic findings suggest that the chronic activation of ER UPR in aged macrophages drives an enhanced ISG program, representing a potential mechanism for inflammaging.
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Direct links to NCBI, no account and no request form: the whole study as GSE304706_RAW.tar, processed values as the series matrix, the supplementary file directory, and per-sample supplementary files for any of the 8 samples. Raw sequencing reads are also available from ENA.

Also filed as BioProject PRJNA1302373 and SRA study SRP606958. Searching any of these in the dataset finder brings you back here.

Study design
4 × Peritoneal macrophages from young mouse, vs 4 × Peritoneal macrophages from aged mouse,

Supports a between-group comparison across 8 samples.

2 replicated groups read from 8 sample titles; they account for 8 of them. Check it against the sample list below before relying on it.

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