Across TCGA pan-cancer cohorts, PDE4A mass-spec protein differs between tumor and matched normal tissue in 3 of 18 cancer types tested, making tumor–normal expression one of PDE4A’s most consistent transcriptional readouts.
The strongest signal is observed in lung squamous cell carcinoma (LSCC), where PDE4A mass-spec protein is repressed in tumor relative to normal tissue. In most cancer types PDE4A is over-expressed in tumor, although a few such as LSCC and LUAD show the opposite, repressed pattern.
LSCC, LUAD, and CCRCC are the cancer types where PDE4A tumor–normal differential expression is most reproducible.