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Glutathione S-transferase Theta 2 causes drug resistance by inhibiting arsenic trioxide-induced ferroptosis in pancreatic ductal adenocarcinoma

GSE298845 Mus musculus (mouse) RNA-seq (gene expression) 12 samples Submitted 2026/06/10 Platform GPL17021
At a glance

RNA-seq (gene expression) · mouse · 12 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
12 samples: 3 × ACtrl vs 3 × AATO vs 3 × BCtrl vs 3 × BATOGroups 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.
Summary (written by the submitters)
Currently, chemotherapy remains a key treatment modality for pancreatic ductal adenocarcinoma (PDAC). However, the emergence of drug resistance limits the chemotherapeutic efficacy. Ferroptosis inhibition plays a significant role in chemotherapy resistance. This study investigates the potential mechanisms of PDAC resistance to arsenic trioxide (ATO) and explores the role of GSTT2 in chemotherapeutic resistance.
Read the full summary ↓
PDAC cells showed ATO resistance due to inhibition of drug-induced ferroptosis, which was validated in vivo and in vitro. Inhibition of nuclear factor erythroid 2-related factor 2 (Nrf2) did not restore ferroptosis. Transcriptomic analysis showed that GSTT2 is significantly upregulated in ATO-resistant cells, suggesting it is a key factor in drug resistance. GSTT2 is highly expressed in ATO-resistant cells compared to ATO-sensitive cells. Silencing GSTT2 enhances the sensitivity of resistant cells to ATO. Further studies indicate that GSTT2, a downstream target of Nrf2, regulates the expression of glutathione peroxidase 4 (GPX4) and ferritin light chain (FTL). Silencing GSTT2 can enhance drug sensitivity by activating ferroptosis in drug-resistant cells. Our study identifies the Nrf2-GSTT2-GPX4 ferroptosis regulatory axis, demonstrating that GSTT2 is a negative regulator of ATO-induced ferroptosis. The development of therapeutic strategies targeting the Nrf2-GSTT2-GPX4 axis will open new avenues for combating resistance to chemotherapy in PDAC.
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 GSE298845_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 PRJNA1271484 and SRA study SRP589688. Searching any of these in the dataset finder brings you back here.

Study design
3 × ACtrl vs 3 × AATO vs 3 × BCtrl vs 3 × BATO

Supports a between-group comparison across 12 samples.

How we read this: 4 replicated groups read from 12 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
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