Altered antigen expression predicts outcome in squamous cell carcinoma of the head and neck

Journal of the National Cancer Institute
G T WolfS Hsu

Abstract

Monoclonal antibody UM-A9 identifies an antigen found on the basal surface of epithelial cells and expressed on all of the squamous cell carcinomas (SCC) that we have tested. In a previous study, we showed that cell lines from metastatic or recurrent SCC exhibit stronger expression of the A9 cell membrane antigen than cell lines from the primary tumor of the same donors, suggesting that this marker is associated with tumor progression. Loss of expression in tumor tissue of normal A, B, and H (ABH) blood group antigens has also been linked to clinical behavior in some epithelial cancers. To determine the prognostic significance of these antigen markers, we prospectively evaluated tissue specimens for expression of these markers in a group of 82 consecutive, previously untreated patients with SCC of the head and neck. Three patterns corresponding to strong (pattern 1), intermediate (pattern 2), or weak (pattern 3) A9 antigen expression were observed. Fifty-eight percent of the patients whose tumors had pattern 1 A9 antigen expression and 78% of the patients with loss of blood group antigen had early relapse, compared with only 34% of those with A9 antigen pattern 2 or 3 (P = .042) and 37% of those whose tumors expressed the matur...Continue Reading

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