Across TCGA pan-cancer cohorts, OR1I1 RNA differs between tumor and matched normal tissue in 2 of 18 cancer types tested, making tumor–normal expression one of OR1I1’s most consistent transcriptional readouts.
The strongest signal is observed in colon adenocarcinoma (COAD), where OR1I1 RNA is repressed in tumor relative to normal tissue. In most cancer types OR1I1 is over-expressed in tumor, although a few such as COAD show the opposite, repressed pattern.
COAD and THCA are the cancer types where OR1I1 tumor–normal differential expression is most reproducible.