Across TCGA pan-cancer cohorts, IRF9 mass-spec protein differs between tumor and matched normal tissue in 6 of 18 cancer types tested, making tumor–normal expression one of IRF9’s most consistent transcriptional readouts.
The strongest signal is observed in head and neck squamous cell carcinoma (HNSC), where IRF9 mass-spec protein is more highly expressed in tumor relative to normal tissue. In most cancer types IRF9 is over-expressed in tumor.
HNSC, CCRCC, and PDAC are the cancer types where IRF9 tumor–normal differential expression is most reproducible.
mass-spec protein tumor vs normal associations by lineage
Ranked by sampling consensus. Fold-change is the tumor-versus-normal difference in IRF9 mass-spec protein (log2); positive values indicate higher expression in tumor. p-values are from the differential-expression test.