A novel approach to biomarker discovery in head and neck cancer using an autoantibody signature
Copyright policy )A novel approach to biomarker discovery in head and neck cancer using an autoantibody signature
Despite the dismal prognosis for patients with squamous cell carcinoma of the head and neck (SCCHN), there have been no novel treatments in over 40 years. Identification of novel tumor antigens in SCCHN will facilitate the identification of potential novel treatment targets. Tumor antigens are proteins selectively expressed by tumor cells and recognized by the host immune system. Phage-displayed tumor antigens were enriched by biopanning with normal and then SCCHN-specific serum. Ninety-six phage clones were sequenced for identification, and 21 clones were validated using Luminex. One of these proteins, L23, a novel tumor antigen in SCCHN, was validated as an oncogene. L23 is upregulated in SCCHN compared with normal keratinocytes. Knockdown of L23 inhibited proliferation, invasion and cell survival. Overexpression of L23 had the reverse effect. Overexpression of L23 in non malignant cells led to transformation. Injection of SCCHN cells with knockdown of L23 in mice, induced tumors that were significantly smaller than control tumors. In conclusion, the immunomic screen yielded a panel of antigens specific to SCCHN; one of these proteins, L23, is a novel oncogene in SCCHN.
- University of Michigan–Ann Arbor United States
- Michigan Medicine United States
- University of Michigan–Flint United States
- Michigan Center for Translational Pathology United States
Keratinocytes, Mice, Nude, Reproducibility of Results, Apoptosis, Oncogenes, Gene Expression Regulation, Neoplastic, Mice, Antigens, Neoplasm, Head and Neck Neoplasms, Reference Values, Case-Control Studies, Cell Line, Tumor, Biomarkers, Tumor, Carcinoma, Squamous Cell, NIH 3T3 Cells, Animals, Humans, Cell Surface Display Techniques, Autoantibodies, Cell Proliferation
Keratinocytes, Mice, Nude, Reproducibility of Results, Apoptosis, Oncogenes, Gene Expression Regulation, Neoplastic, Mice, Antigens, Neoplasm, Head and Neck Neoplasms, Reference Values, Case-Control Studies, Cell Line, Tumor, Biomarkers, Tumor, Carcinoma, Squamous Cell, NIH 3T3 Cells, Animals, Humans, Cell Surface Display Techniques, Autoantibodies, Cell Proliferation
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