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TREM2+ Macrophage Infiltration Underlies Breast Cancer Lung Metastasis due to Paclitaxel Treatment [ATAC-seq]

GSE295918 Mus musculus (mouse) ChIP-seq / ATAC-seq (genome binding and open chromatin) 8 samples Submitted 2025/12/31 Platform GPL34290Platform GPL34284
At a glance

ChIP-seq / ATAC-seq (genome binding and open chromatin) · mouse · 8 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)
Topic
Breast cancerThis series is part of our curated briefing on it.
Samples
8 samples: 8 samples, each with a distinct title — no replicated groupsGroups 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
Paclitaxel drives TREM2(+) macrophage expansion underlying its inferior therapeutic efficacy compared to Nab-paclitaxelNature communications · 2026
Summary (written by the submitters)
Metastasis is a major cause of breast-cancer-related death and frequently occurs following paclitaxel neoadjuvant chemotherapy failure. Tumor microenvironment contributes to metastasis, while the role of specific host cells in lung metastases induced by paclitaxel (PTX) treatment remains poorly understood. Here, we demonstrate that PTX neoadjuvant chemotherapy promotes triggering receptor expressed on myeloid cells-2 (TREM2)-positive macrophage infiltration in the breast cancer tissues of patients.
Read the full summary ↓
Meanwhile, we also show that more TREM2-positive macrophage infiltrates in breast cancer tissues of patients with lung -metastasized. Genetic TREM2 deficiency decreases breast cancer lung metastases induced by PTX treatment in vivo, suggesting that TREM2-positive macrophages are essential for PTX-promoting lung metastasis of breast cancer. We further reveal that PTX promotes tumor cell secretion of fibroblast growth factor 2 (FGF2), triggering TREM2 transcription via upregulating its transcriptional factor early growth response-1 (EGR1) in macrophages. Increased TREM2 activates epithelial-mesenchymal transition (EMT)-related cytokine secretion in macrophages, inducing tumor cell lung metastases. Targeting TREM2 significantly suppressed lung metastasis in breast-cancer-bearing mice. Our findings establish that tumor-cell-derived FGF2 induced by paclitaxel treatment upregulates TREM2 in myeloid macrophages, which in turn promotes the EMT of neighboring tumor cells through cytokine secretion. Our results highlight TREM2 as a potential therapeutic target to mitigate lung metastasis due to PTX treatment.
Published in
Paclitaxel drives TREM2(+) macrophage expansion underlying its inferior therapeutic efficacy compared to Nab-paclitaxel
Xing Y, Zhong R, Li Q et al. · Nature communications 2026 · PMID 41629331 · doi:10.1038/s41467-026-69060-5
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 GSE295918_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 PRJNA1256778 and SRA study SRP582111. Searching any of these in the dataset finder brings you back here.

Study design
8 samples, each with a distinct title — no replicated groups

Any grouping that defines a comparison lives in the sample characteristics, which GEO records separately from the titles.

How we read this: Read from 8 sample titles: 8 distinct titles with little repetition. 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
More Breast cancer datasets

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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.