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Reprogramming intratumoral Tregs by morpholino-mediated splicing of FOXP3 for cancer immunotherapy

GSE286047 Mus musculus (mouse) RNA-seq (gene expression) 14 samples Submitted 2025/07/10 Platform GPL19057
At a glance

RNA-seq (gene expression) · mouse · 14 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
14 samples: 4 × Mut vs 3 × WTGroups 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
Reprogramming intratumoral T(reg) cells by morpholino-mediated splicing of FOXP3 for cancer immunotherapyScience immunology · 2025
Summary (written by the submitters)
Regulatory T cells (Tregs) represent a primary barrier to the development of effective anti-tumor immunity. In the clinic, Tregs are a major contributor to the resistance of immune checkpoint blockade (ICB). Preclinical studies have reported complete tumor regression upon Treg depletion in mice. However, systemic depletion of Tregs is detrimental and sometimes lethal as it causes immune-related adverse effects, such as autoimmune diseases.
Read the full summary ↓
Here, we report that reprogramming Treg functions, by shifting the expression of FOXP3 from its full-length isoform (FOXP3FL) to a short isoform with exon 2 skipped (FOXP3dE2), promotes the tumor-killing activity of T effectors while limiting the adverse effects of Treg depletion. FOXP3dE2 mRNA expression in triple negative breast cancer tissue positively correlates with overall survival of the patients. Mice expressing only the FOXP3dE2 isoform are resistant to the development of various types of tumors, while the littermate wildtype (WT) mice expressing FOXP3FL isoform exhibit significant tumor growth. Intratumoral injection of FOXP3dE2-directing morpholino (dE2 MO) in WT mice markedly increased IFN-.+ CD4 and CD8 T cells in tumors and consequently inhibited the tumor growth. We developed a novel mouse strain with a humanized Foxp3 exon 2 capable of expressing both FOXP3 isoforms through alternative splicing. This mouse strain showed better antitumor immunity than WT mice and dE2 MO treatment can further enhance their antitumor activity. The antitumor activity of dE2 MO was also confirmed using autologous tumor-infiltrating T cells and patient-derived tumor organoids. Taken together, our results suggest that enhancing FOXP3dE2 isoform expression will reprogram tumor infiltrating Tregs and convert these immune suppressive Tregs to helper-like T cells, thus promoting antitumor immunity.
Published in
Reprogramming intratumoral T(reg) cells by morpholino-mediated splicing of FOXP3 for cancer immunotherapy
Li Y, Singh N, Dong C et al. · Science immunology 2025 · PMID 40845126 · doi:10.1126/sciimmunol.adr9933
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 GSE286047_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 PRJNA1207540 and SRA study SRP555820. Searching any of these in the dataset finder brings you back here.

Study design
4 × Mut vs 3 × WT

Supports a between-group comparison across 7 samples.

How we read this: 2 replicated groups read from 14 sample titles; they account for 7 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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