title: Rapid identification of an HLA-B*1501-restricted vaccinia peptide antigen.
abstract: We identified a modified vaccinia virus Ankara (MVA)-peptide recognized by T cells of a vaccinated patient, applying a modified expression-based procedure. CD8(+) T cells reactive with MVA were expanded from peripheral blood of a patient after MVA-vaccination. The restricting HLA-elements and the antigen were determined applying stably HLA-class I-transfected K562 cells that were either infected wit MVA or transfected with a panel of MVA open reading frames (ORF). The T cells recognized the ORF 28R (K7R) gene product in association with HLA-B*1501 and the peptide-coding region was localized applying truncated in vitro transcribed mRNA. The 9-mer peptide encoded (ORF 28(25-33), SIIDLIDEY) was identified that was also recognized by ex vivo CD8(+) T cells from the patient and further healthy individuals.
authors.affiliation: III Medizinische Klinik, Johannes Gutenberg-Universitaet, Mainz, Germany. r.meyer@3-med.klinik.uni-mainz.de
authors.forename: Ralf G
authors.initials: RG
authors.lastname: Meyer
authors.forename: Claudine
authors.initials: C
authors.lastname: Graf
authors.forename: Cedrik M
authors.initials: CM
authors.lastname: Britten
authors.forename: Christoph
authors.initials: C
authors.lastname: Huber
authors.forename: Thomas
authors.initials: T
authors.lastname: Wölfel
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000956:Antigens, Viral / Q000235:genetics / Q000276:immunology*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D019556:COS Cells; D045744:Cell Line, Tumor; D002522:Chlorocebus aethiops; D018984:Epitopes, T-Lymphocyte / Q000235:genetics / Q000276:immunology*; D015235:HLA-B Antigens / Q000235:genetics / Q000276:immunology*; D006801:Humans; D008969:Molecular Sequence Data; D016176:T-Lymphocyte Subsets / Q000276:immunology; D014162:Transfection; D014616:Vaccinia virus / Q000235:genetics / Q000276:immunology*
chemical_list: D000956:Antigens, Viral; D018984:Epitopes, T-Lymphocyte; D015235:HLA-B Antigens