Across TCGA pan-cancer cohorts, FOXP4 mass-spec protein differs between tumor and matched normal tissue in 3 of 18 cancer types tested, making tumor–normal expression one of FOXP4’s most consistent transcriptional readouts.
The strongest signal is observed in colon adenocarcinoma (COAD), where FOXP4 mass-spec protein is more highly expressed in tumor relative to normal tissue. In most cancer types FOXP4 is over-expressed in tumor, although a few such as LSCC show the opposite, repressed pattern.
COAD, LUAD, and LSCC are the cancer types where FOXP4 tumor–normal differential expression is most reproducible.