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