Reactive Oxygen Species (ROS) pathway is associated with aggressive cancer biology, elevated immune response, and with worse survival in ER-positive/HER2-negative breast cancer (SABCS 2021)
The ROS score was significantly associated with aggressive clinical factors, such as triple-negative breast cancer (TNBC) subtype, Nottingham histological grade, American Joint Committee on Cancer (AJCC) Stage and lymph node metastasis consistently in both GSE96058 and METABRIC (all p < 0.001). High ROS score was significantly associated with worse overall survival (OS) in the GSE96058 (hazard ratio (HR) = 3.59, 95% confidence interval (CI); 2.47-5.20, p < 0.001), as well as OS (HR = 1.55, 95%CI; 1.16-2.07, p = 0.002), disease-free survival (HR = 1.63, 95%CI; 1.10-2.43, p = 0.016), and disease-specific survival (HR = 2.57, 95%CI; 1.75-3.77, p < 0.001) in the METABRIC cohort. Subgroup analysis revealed that a high ROS score was significantly associated with worse OS in ER-positive/HER2-negative breast cancer in both cohorts.