← BioTransfer GEO Dataset Finder
GEO series

PARP inhibition induces cytotoxicity in mESCs by activating endogenous retroviruses [ATAC-seq]

GSE166962 Mus musculus (mouse) ChIP-seq / ATAC-seq (genome binding and open chromatin) 13 samples Submitted 2026/05/11 Platform GPL24247
At a glance

ChIP-seq / ATAC-seq (genome binding and open chromatin) · mouse · 13 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
13 samples: 3 × KO_DMSO vs 3 × KO_Tal vs 3 × WT_DMSO vs 3 × WT_TalGroups 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
PARP1 inhibition in naïve mouse embryonic stem cells induces viral mimicryNucleic acids research · 2026
Summary (written by the submitters)
PARP inhibitors (PARPi) have been approved to treat patients with BRCA-deficient cancers via synthetic lethality. How PARPi kill BRCA-proficient cells remains an important unanswered question. Here we provide evidence that naïve murine embryonic stem cells, although being homologous-recombination potent, are very sensitive to PARPi such as Talazoparib (Tal).
Read the full summary ↓
Tal acts on ARTD1 and activates p53 by blocking TOP2A dissociation from chromatin. Genome-wide CRISPR screening showed that the loss of TET1 reduces Tal induced cytotoxicity, which is recapitulated by the depletion of TDG. TET and TDG mediated DNA demethylation turnover renders the local chromatin accessible and facilitates p53 dependent transcription. Consequently, Tal treatment strongly activates the expression of endogenous retroviruses in a p53- and TET/TDG-dependent manner. The uncovered contribution of TET/TDG into Tal induced cytotoxicity sheds further light on future personalized medicine and suggests that TET/TDG mediated active DNA demethylation may represent a biomarker for the predication of sensitivity to PARPi.
Published in
PARP1 inhibition in naïve mouse embryonic stem cells induces viral mimicry
Xu J, Schwarz SD, Gunasekera K et al. · Nucleic acids research 2026 · PMID 42234580 · doi:10.1093/nar/gkag537
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 GSE166962_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 PRJNA702478 and SRA study SRP306864. Searching any of these in the dataset finder brings you back here.

Study design
3 × KO_DMSO vs 3 × KO_Tal vs 3 × WT_DMSO vs 3 × WT_Tal

Supports a between-group comparison across 12 samples.

How we read this: 4 replicated groups read from 13 sample titles; they account for 12 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
Datasets on a similar topic

Search all mouse ChIP / ATAC / CUT&Tag datasets in GEO →

Share this dataset

Metadata from NCBI GEO, cached and refreshed periodically — the NCBI page above is authoritative. Downloads link straight to NCBI/ENA; nothing is proxied through BioTransfer.