Across TCGA pan-cancer cohorts, H3P39 RNA differs between tumor and matched normal tissue in 3 of 18 cancer types tested, making tumor–normal expression one of H3P39’s most consistent transcriptional readouts.
The strongest signal is observed in uterine corpus endometrial carcinoma (UCEC), where H3P39 RNA is repressed in tumor relative to normal tissue. In most cancer types H3P39 is over-expressed in tumor, although a few such as UCEC show the opposite, repressed pattern.
UCEC, BRCA, and LIHC are the cancer types where H3P39 tumor–normal differential expression is most reproducible.