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Investigating the Prognostic Role of Telomerase-Related Cellular Senescence Gene Signatures in Breast Cancer Using

Qiong Li1, Hongde Liu1

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This summary is machine-generated.

A new 19-gene signature linked to telomeres and cellular senescence shows strong prognostic value for breast cancer. This discovery aids in understanding tumor heterogeneity and developing precision oncology treatments.

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Area of Science:

  • Oncology
  • Genomics
  • Cellular Biology

Background:

  • Telomeres and cellular senescence are crucial in cancer development, impacting genomic stability and the tumor microenvironment.
  • These processes are particularly relevant in breast cancer progression.
  • Understanding their role is key to developing new therapeutic strategies.

Purpose of the Study:

  • To develop a prognostic gene signature for breast cancer based on telomere maintenance and cellular senescence.
  • To leverage machine learning for robust model development and validation.
  • To explore tumor heterogeneity and the tumor microenvironment using advanced transcriptomic analyses.

Main Methods:

  • Integrated bulk and single-cell RNA sequencing (scRNA-seq) data.
  • Curated telomere-related genes (TEGs) and senescence-associated genes from TCGA and GEO databases.
  • Employed a machine learning framework with 101 algorithmic combinations across 10 survival modeling approaches.

Main Results:

  • Identified a 19-gene signature with optimal prognostic predictive accuracy, validated across independent cohorts.
  • Functional enrichment revealed associations with immune responses and aging pathways.
  • scRNA-seq highlighted cellular heterogeneity, with distinct subpopulations exhibiting varied risk scores and pathway activity; IHC confirmed protein expression differences.

Conclusions:

  • A novel 19-gene signature for telomere and senescence provides significant prognostic value in breast cancer.
  • Findings deepen the understanding of breast cancer tumor heterogeneity.
  • This signature may guide precision oncology and future therapeutic interventions.