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ICOS limits memory-like properties and function of exhausted PD-1+ CD8 T cells [ATAC-seq]

GSE288889 Mus musculus (mouse) ChIP-seq / ATAC-seq (genome binding and open chromatin) 10 samples Submitted 2025/07/07 Platform GPL30172
At a glance

ChIP-seq / ATAC-seq (genome binding and open chromatin) · mouse · 10 samples

What it is
ChIP-seq / ATAC-seq (genome binding and open chromatin)Where proteins bind the genome, or which regions are open and active.
Organism
Mus musculus (mouse)
Samples
10 samples: 3 × ATAC-seq of CD8 Tpex sgIcos cells, vs 3 × ATAC-seq of CD8 Tex sgIcos cells, vs 2 × ATAC-seq of CD8 Tpex sgCtrl cells, vs 2 × ATAC-seq of CD8 Tex sgCtrl cells,Groups are read from the sample names, not from the paper. Check the list below.
Data you can get
A processed table (series matrix) and supplementary files from NCBI; the raw sequencing reads from ENA. Which of these hold counts depends on the study, so check the file list.
Paper
The costimulatory molecule ICOS limits memory-like properties and function of exhausted PD-1(+)CD8(+) T cellsImmunity · 2025
Summary (written by the submitters)
During persistent antigen stimulation, PD-1+CD8 T cells are maintained by progenitor exhausted PD-1+TCF-1+CD8 T cells (Tpex). Tpex respond to PD-1 blockade, and regulation of Tpex differentiation into more functional Tex is of major interest for cancer immunotherapies. Tpex express high levels of Inducible Costimulator (ICOS), but the role of ICOS for PD-1+CD8 T cell responses has not been addressed.
Read the full summary ↓
In chronic infection, ICOS-deficiency increased both number and quality of virus-specific CD8 T cells, with accumulation of effector-like Tex due to enhanced survival. Mechanistically, loss of ICOS signaling potentiated FoxO1 activity and memory features of Tpex. ICOS-deficient Tex displayed enhanced survival and improved cytokine production. In chronically-infected mice, ICOS-Ligand blockade expanded effector-like Tex, reduced viral load and potentiated anti-PD-L1 therapy. In a mouse model of hepatocellular carcinoma, ICOS inhibition improved cytokine production by tumor-specific PD-1+CD8 T cells and sensitized tumors to PD-1 targeted therapy. Overall, we show that sustained ICOS costimulation limits CD8 T cell responses during chronic antigen exposure.
Published in
The costimulatory molecule ICOS limits memory-like properties and function of exhausted PD-1(+)CD8(+) T cells
Humblin E, Korpas I, Prokhnevska N et al. · Immunity 2025 · PMID 40628269 · doi:10.1016/j.immuni.2025.06.001
This dataset
Download · which file do I need?

Direct links to NCBI and ENA, no account and no request form. Pick by what you want to do: take the small processed table to look, the supplementary files to re-analyse, or the original raw data to start over.

1 · Just have a look

Processed table

The series matrix: one table of values per sample as the submitters processed it. The smallest download, and it opens in Excel or R. Start here to see what the data look like.

2 · Re-analyse it

Supplementary files

The count tables and other files the authors uploaded. Take only the samples you need, or the whole study as GSE288889_RAW.tar (it can run to tens of gigabytes).

3 · Start from the raw reads

Raw sequencing reads

The original FASTQ files, straight from the sequencer, held at ENA. Large, and you align them yourself, so only choose this if you need to re-process the study from scratch.

What the files usually look like: Look for peak files (.bed, .narrowPeak) and signal tracks (.bigWig) among the supplementary files; the raw reads are on ENA.

Also filed as BioProject PRJNA1219685 and SRA study SRP561822. Searching any of these in the dataset finder brings you back here.

Study design
3 × ATAC-seq of CD8 Tpex sgIcos cells, vs 3 × ATAC-seq of CD8 Tex sgIcos cells, vs 2 × ATAC-seq of CD8 Tpex sgCtrl cells, vs 2 × ATAC-seq of CD8 Tex sgCtrl cells,

Supports a between-group comparison across 10 samples.

How we read this: 4 replicated groups read from 10 sample titles; they account for 10 of them. These groups are guessed from the sample names, not taken from the paper, so check them against the sample list below before relying on them.

Samples in this study
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