Tissue specificityIsoform 5A is expressed only in testis (at the protein level). Other isoforms are expressed in several other normal tissues, including brain, muscle and cranial skin. Isoform 5A (at protein level) and isoform 5B are expressed in cutaneous T-cell lymphoma (CTCL) cell lines, colorectal carcinomas, breast carcinomas and melanoma. Isoform 5B, but not isoform 5A, is expressed in head and neck squamous cell carcinoma.
Involvement in diseaseNote=Autoantibodies against CTAGE5 are present in several cancer types, including benign meningioma and cutaneous T-cell lymphoma (CTCL).