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SERT inhibits CD8 T cell antitumor immunity through regulating the intratumoral serotonin axis

GSE262781 Mus musculus (mouse) RNA-seq (gene expression) 3 samples Submitted 2025/05/27 Platform GPL24247
At a glance

RNA-seq (gene expression) · mouse · 3 samples

What it is
RNA-seq (gene expression)Gene activity measured by sequencing. The summary does not mention single-cell work, so this is most likely bulk: one average per sample, the usual starting point for comparing groups.
Organism
Mus musculus (mouse)
Samples
3 samples
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
Serotonin transporter inhibits antitumor immunity through regulating the intratumoral serotonin axisCell · 2025
Summary (written by the submitters)
Identifying new immune checkpoint molecules hindering antitumor T cell responses and devising new therapeutic blockades are key to the development of next-generation cancer immunotherapies. Here, we report the induction of the serotonin transporter (SERT) in solid tumor-infiltrating cytotoxic CD8 T cells, a molecule best known for its role in regulating serotonin neurotransmission in the brain.
Read the full summary ↓
In solid tumors, CD8 T cells secrete serotonin, which stimulates their antitumor reactivities, while SERT functions as a negative regulator by depleting intratumoral serotonin. Inhibition of SERT using clinically approved selective serotonin reuptake inhibitors (SSRIs), a popular class of antidepressants, significantly suppressed tumor growth and enhanced CD8 T cell-mediated antitumor responses in various preclinical mouse syngeneic and human xenograft tumor models. Importantly, SSRI treatment exhibited significant therapeutic synergy with anti-PD-1 therapy, and clinical data correlation studies negatively associated intratumoral SERT expression with patient survival in a range of cancers. These findings highlight the significance of the intratumoral serotonin axis and identify SERT as a novel immune checkpoint, positioning SSRIs as promising candidates for next-generation combination cancer therapies.
Published in
Serotonin transporter inhibits antitumor immunity through regulating the intratumoral serotonin axis
Li B, Elsten-Brown J, Li M et al. · Cell 2025 · PMID 40403728 · doi:10.1016/j.cell.2025.04.032
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 GSE262781_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: For RNA-seq the counts are usually a table among the supplementary files (look for 'counts', 'expression', 'FPKM' or 'TPM' in the file name). The series matrix of a sequencing study is sometimes nearly empty.

Also filed as BioProject PRJNA1093373 and SRA study SRP498605. Searching any of these in the dataset finder brings you back here.

Samples in this study

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