Subtype-specific transcription factors affect polyamine metabolism and the tumor microenvironment in breast cancer
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View abstract on PubMed
Summary
This summary is machine-generated.This study identifies key transcription factors regulating polyamine metabolism genes in high-risk breast cancers. These findings offer new insights into polyamine's role and potential therapeutic strategies for advanced breast cancer subtypes.
Area Of Science
- Molecular Biology
- Oncology
- Genetics
Background
- Polyamines are crucial for cell growth and proliferation.
- Dysregulation of polyamine metabolism genes is observed in various cancers.
- The transcription factors governing polyamine metabolism genes and their links to tumor heterogeneity remain incompletely understood.
Purpose Of The Study
- To identify dysregulated polyamine metabolism genes and their regulating transcription factors in breast cancer subtypes.
- To investigate the role of tumor microenvironment and heterogeneity in these transcriptional regulations.
- To explore the clinical implications of these findings for breast cancer therapy.
Main Methods
- Utilized bulk RNA-sequencing data to identify dysregulated polyamine metabolism genes and transcription factors across breast cancer subtypes.
- Employed single-cell RNA sequencing (scRNA-seq) to analyze subtype-specific gene expression within the tumor microenvironment.
- Performed Gene Ontology enrichment and survival analyses to understand gene functions and patient outcomes.
Main Results
- Identified specific polyamine metabolism genes (e.g., AGMAT, CAV1, APRT, SAT1) dysregulated across breast cancer subtypes, with some linked to more lethal types.
- Pinpointed three transcription factors (SPI1, IRF1, IRF3) regulating key polyamine metabolism genes (SRM, APRT, SAT1).
- Confirmed these transcriptional regulations within the tumor microenvironment and found their upregulation in high-risk subtypes (e.g., basal-like), correlating with poorer outcomes under chemotherapy and radiation.
Conclusions
- Identified three subtype-specific transcription factors that regulate polyamine metabolism genes in high-risk breast cancer subtypes and their tumor microenvironment.
- Enhanced understanding of polyamine metabolism's role in breast cancer progression.
- Provided potential targets for improving clinical therapy in advanced breast cancer subtypes.
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