Across TCGA pan-cancer cohorts, OR1M1 RNA differs between tumor and matched normal tissue in 4 of 18 cancer types tested, making tumor–normal expression one of OR1M1’s most consistent transcriptional readouts.
The strongest signal is observed in lung squamous cell carcinoma (LUSC), where OR1M1 RNA is repressed in tumor relative to normal tissue. In most cancer types OR1M1 is over-expressed in tumor, although a few such as LUSC and STAD show the opposite, repressed pattern.
LUSC, KIRC, and LUAD are the cancer types where OR1M1 tumor–normal differential expression is most reproducible.