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