title: Identification of peptides applicable as vaccines for HLA-A26-positive cancer patients.
abstract: One-fifth of the Japanese population is positive for HLA-A26, but few peptides are available as potential cancer vaccines for HLA-A26-positive cancer patients. The objective of this study was to identify peptide vaccine candidates for HLA-A26-positive cancer patients. The HLA-A*2601-crossbinding activity of 24 peptides currently under clinical trial as vaccines for HLA-A2, -A24, or HLA-A3 supertype-positive cancer patients was evaluated by stabilization assay. Three peptides with HLA-A2-binding activity could bind the HLA-A*2601 molecule. These three peptides induced HLA-A26-restricted cytotoxic T lymphocytes from HLA-A*2601-, -A*2602-, or -A*2603-positive prostate cancer patients against HLA-A*2601- and HLA-A*2603-positive cancer cells in CD8-dependent and peptide-specific manners. In addition, one peptide with HLA-A24-binding activity could bind to HLA-A*2601 and induced HLA-A26-restricted cytotoxic T lymphocytes from HLA-A*2601-, -A*2602-, or -A*2603-positive prostate cancer patients against HLA-A*2603-positive cancer cells. These results may provide novel information for the development of a peptide-based cancer vaccine for HLA-A26-positive patients.
authors.affiliation: Immunology and Immunotherapy, Kurume University School of Medicine, Kurume, Fukuoka, Japan.
authors.forename: Yamei
authors.initials: Y
authors.lastname: Niu
authors.forename: Yasunobu
authors.initials: Y
authors.lastname: Terasaki
authors.forename: Nobukazu
authors.initials: N
authors.lastname: Komatsu
authors.forename: Masanori
authors.initials: M
authors.lastname: Noguchi
authors.forename: Shigeki
authors.initials: S
authors.lastname: Shichijo
authors.forename: Kyogo
authors.initials: K
authors.lastname: Itoh
mesh_terms: D000818:Animals; D019496:Cancer Vaccines / Q000276:immunology*; D045744:Cell Line, Tumor; D015234:HLA-A Antigens / Q000032:analysis / Q000276:immunology*; D015789:HLA-A2 Antigen / Q000032:analysis / Q000276:immunology; D059871:HLA-A24 Antigen; D006801:Humans; D051379:Mice; D009369:Neoplasms / Q000276:immunology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology
chemical_list: D019496:Cancer Vaccines; D015234:HLA-A Antigens; C039683:HLA-A*26 antigen; D015789:HLA-A2 Antigen; D059871:HLA-A24 Antigen
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