Quantifying replication stress in cancer without proliferation confounding
The authors developed a refined gene expression signature (TRSS) that accurately measures replication stress independently of cell proliferation, addressing a major limitation of existing biomarkers that conflate stress with oncogene-driven growth. Applying this signature to patient samples, they discovered that replication stress is associated with activation of the non-homologous end-joining DNA repair pathway, suggesting cells may shift toward this repair mechanism under replication stress conditions.