Across TCGA pan-cancer cohorts, PPFIA2 mass-spec protein differs between tumor and matched normal tissue in 4 of 18 cancer types tested, making tumor–normal expression one of PPFIA2’s most consistent transcriptional readouts.
The strongest signal is observed in head and neck squamous cell carcinoma (HNSC), where PPFIA2 mass-spec protein is more highly expressed in tumor relative to normal tissue. In most cancer types PPFIA2 is over-expressed in tumor, although a few such as LSCC and CCRCC show the opposite, repressed pattern.
HNSC, PDAC, and LSCC are the cancer types where PPFIA2 tumor–normal differential expression is most reproducible.