Across TCGA pan-cancer cohorts, IGHV1-45 mass-spec protein differs between tumor and matched normal tissue in 4 of 18 cancer types tested, making tumor–normal expression one of IGHV1-45’s most consistent transcriptional readouts.

The strongest signal is observed in head and neck squamous cell carcinoma (HNSC), where IGHV1-45 mass-spec protein is repressed in tumor relative to normal tissue. In most cancer types IGHV1-45 is over-expressed in tumor, although a few such as HNSC and LSCC show the opposite, repressed pattern.

HNSC, LSCC, and COAD are the cancer types where IGHV1-45 tumor–normal differential expression is most reproducible.

mass-spec protein tumor vs normal associations by lineage

Ranked by sampling consensus. Fold-change is the tumor-versus-normal difference in IGHV1-45 mass-spec protein (log₂); positive values indicate higher expression in tumor. p-values are from the differential-expression test.

Lineage	Gender	Stage	Fold-change	p	Sampling consensus
HNSC	All	III,IV	−0.758	<.001	8	view →
LSCC	Male	All	−0.437	<.001	4	view →
COAD	All	All	−0.817	.045	2	view →
LUAD	Female	All	−0.441	.016	2	view →

Pink = over-expressed in tumor, green = repressed in tumor. Showing the 4 strongest of 4 lineages.

Exploration

Same gene, other analysis: IGHV1-45 RNA expression & survival · all IGHV1-45 data types