Exploratory biomarker analysis of RAS/BRAF somatic mutations and gene expression signatures for predicting treatment effects of aflibercept in the velour trial.

ABSTRACT: The phase III VELOUR trial demonstrated improved outcomes with aflibercept plus FOLFIRI in patients with metastatic colorectal cancer previously treated with oxaliplatin-based regimens. We retrospectively evaluated the prognostic and predictive impact of RAS/BRAF mutations, intrinsic consensus molecular subtype (iCMS), and tumour sidedness in 439 profiled patients. Targeted sequencing identified RAS mutations in 57.5% and BRAF mutations in 10.0% of evaluable tumours; 34.2% of tumours with complete genotyping were RAS/BRAF wild-type. Transcriptomic profiling classified 66.5% of tumours as iCMS2 and 33.5% as iCMS3. RAS/BRAF wild-type tumours showed numerically improved overall survival (OS) and progression-free survival (PFS) with aflibercept, whereas no clear benefit was observed in RAS-mut

SUBMITTER: Pu T 

PROVIDER: S-EPMC12858838 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature