Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
3258460 | Clinical Immunology | 2007 | 9 Pages |
Abstract
Wild-type sequence (wt) p53 peptides are attractive candidates for broadly applicable cancer vaccines. Six HLA-A2 or HLA-A24-restricted wt p53 peptides were evaluated for their ex vivo immunogenicity and their potential for use in cancer vaccines. Peripheral blood mononuclear cells (PBMC) obtained from HLA-Aâ0201+ and/or HLA-Aâ2402+ normal donors and subjects with squamous cell carcinoma of the head and neck (SCCHN) were analyzed for p53 peptide-specific reactivity in ELISPOT IFN-γ assays. CD8+ T cells in 7/10 normal donors (HD) and 11/23 subjects with SCCHN responded to at least one of the wt p53 peptides. CD8+ T cell precursors responsive to wt p53 epitopes were detected in the circulation of most subjects with early disease, and an elevated blood Tc1/Tc2 ratio distinguished wt p53 peptide responders from non-responders. The identification of multiple wt p53 peptides able to induce cytolytic T lymphocytes in most subjects with cancer promotes the development of multi-epitope p53 vaccines.
Related Topics
Life Sciences
Immunology and Microbiology
Immunology
Authors
Koichi Sakakura, Kazuaki Chikamatsu, Nobuhiko Furuya, Ettore Appella, Theresa L. Whiteside, Albert B. DeLeo,