Across TCGA pan-cancer cohorts, GREB1 mass-spec protein differs between tumor and matched normal tissue in 3 of 18 cancer types tested, making tumor–normal expression one of GREB1’s most consistent transcriptional readouts.
The strongest signal is observed in lung squamous cell carcinoma (LSCC), where GREB1 mass-spec protein is more highly expressed in tumor relative to normal tissue. In most cancer types GREB1 is over-expressed in tumor, although a few such as PDAC show the opposite, repressed pattern.
LSCC, LUAD, and PDAC are the cancer types where GREB1 tumor–normal differential expression is most reproducible.