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Biological Effects of Intraoperative Radiation Therapy (IORT): Histopathological Changes and Immunomodulation in Breast Cancer Patients

GSE253650 Homo sapiens (human) RNA-seq (gene expression) 37 samples Submitted 2024/04/14 Platform GPL24676
At a glance

RNA-seq (gene expression) · human · 37 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
Homo sapiens (human)
Topic
Breast cancerThis series is part of our curated briefing on it.
Samples
37 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
Biological effects of intraoperative radiation therapy: histopathological changes and immunomodulation in breast cancer patientsFrontiers in immunology · 2024
Summary (written by the submitters)
Intraoperative radiation therapy (IORT) delivers a single accelerated radiation dose directly to the breast tumor bed. The synergistic effects of simultaneous surgery and radiation are poorly understood. We here explored the cellular and molecular changes induced by IORT in the tumor bed compared to no-IORT exposed breast tissues. Squamous metaplasia (SM) was identified in both cohorts; however, squamous metaplasia with atypia (SMwA) was only seen in IORT specimens (63.6%, p=0.004).
Read the full summary ↓
SMwA mimicked DCIS on histology, requiring confirmatory stains (i.e., estrogen receptor and p63) for diagnosis. Neither SM nor SMwA were found in the initial BCS specimen. We identified 1,662 differentially expressed genes (875 upregulated and 787 downregulated) between IORT and non-IORT samples. Gene ontology analyses showed that IORT was associated with the enrichment of several immune response pathways, such as inflammatory response, granulocyte activation, and T-cell activation (p<0.001). Notably, when only considering normal tissue from both cohorts, IORT was associated with intrinsic apoptotic signaling (p<0.001). Finally, we inferred a higher abundance of gamma delta T-cells, dendritic cells, and monocytes in the IORT samples compared to non-IORT samples. In conclusion, IORT induces histological changes, including squamous metaplasia with atypia, and elicits molecular alterations associated with intrinsic apoptotic signaling and immune response pathways. The higher abundance of immune-related components in breast tissue exposed to IORT suggests a potential shift towards active immunogenicity in traditionally considered immune-desert tumors such as HR-positive/HER2-negative breast cancer.
Published in
Biological effects of intraoperative radiation therapy: histopathological changes and immunomodulation in breast cancer patients
Orozco JIJ, Valdez BJ, Matsuba C et al. · Frontiers in immunology 2024 · PMID 38720889 · doi:10.3389/fimmu.2024.1373497
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 GSE253650_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 PRJNA1066480 and SRA study SRP484624. Searching any of these in the dataset finder brings you back here.

Samples in this study

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