title: A tumor-infiltrating lymphocyte from a melanoma metastasis with decreased expression of melanoma differentiation antigens recognizes MAGE-12.
abstract: Twenty separate tumor infiltrating lymphocyte (TIL) bulk cultures and a tumor cell line were originated simultaneously from a fine needle aspiration biopsy of a metastasis in a patient with melanoma (F001) previously immunized with the HLA-A*0201-associated gp100:209-217(210 M) peptide. None of the TIL recognized gp100. However, 12 recognized autologous (F001-MEL) and allogeneic melanoma cells expressing the HLA haplotype A*0201, B*0702, Cw*0702. Further characterization of F001-MEL demonstrated loss of gp100/PMel17, severely decreased expression of other melanoma differentiation Ags and retained expression of tumor-specific Ags. Transfection of HLA class I alleles into B*0702/Cw*0702-negative melanoma cell lines identified HLA-Cw*0702 as the restriction element for F001-TIL. A cDNA library from F001-MEL was used to transfect IFN-alpha-stimulated 293 human embryonal kidney (293-HEK) cells expressing HLA-Cw*0702. A 100-gene pool was identified that induced recognition of 293-HEK cells by F001-TIL. Subsequent cloning of the pool identified a cDNA sequence homologous, except for one amino acid (aa 187 D-->A), to MAGE-12. Among 25 peptide sequences from MAGE-12 with the HLA-Cw*0702 binding motif, MAGE-12:170-178 (VRIGHLYIL) induced IFN-gamma release by F001-TIL when pulsed on F001-EBV-B cells at concentrations as low as 10 pg/ml. Peptide sequences from MAGE-1, 2, 3, 4a, and 6 aligned to MAGE-12:170-178 were not recognized by F001-TIL. In summary a TIL recognizing a MAGE protein was developed from an HLA-A*0201 expressing tumor with strongly reduced expression of melanoma differentiation Ags. Persisting tumor-specific Ag expression maintained tumor immune competence suggesting that tumor-specific Ags/melanoma differentiation Ags may complement each other in the context of melanoma Ag-specific vaccination.
authors.affiliation: Surgery Branch, Division of Clinical Sciences, National Cancer Institute, and Department of Transfusion Medicine, Clinical Center, National Institutes of Health, Bethesda, MD 20892, USA.
authors.forename: M C
authors.initials: MC
authors.lastname: Panelli
authors.forename: M P
authors.initials: MP
authors.lastname: Bettinotti
authors.forename: K
authors.initials: K
authors.lastname: Lally
authors.forename: G A
authors.initials: GA
authors.lastname: Ohnmacht
authors.forename: Y
authors.initials: Y
authors.lastname: Li
authors.forename: P
authors.initials: P
authors.lastname: Robbins
authors.forename: A
authors.initials: A
authors.lastname: Riker
authors.forename: S A
authors.initials: SA
authors.lastname: Rosenberg
authors.forename: F M
authors.initials: FM
authors.lastname: Marincola
mesh_terms: D000483:Alleles; D000595:Amino Acid Sequence; D000951:Antigens, Neoplasm / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism; D001483:Base Sequence; D002454:Cell Differentiation / Q000276:immunology; D003001:Cloning, Molecular; D000939:Epitopes / Q000378:metabolism; D015723:Gene Library; D015235:HLA-B Antigens / Q000235:genetics / Q000378:metabolism; D015236:HLA-C Antigens / Q000235:genetics / Q000378:metabolism; D006801:Humans; D016246:Lymphocytes, Tumor-Infiltrating / Q000276:immunology* / Q000378:metabolism* / Q000473:pathology; D008545:Melanoma / Q000276:immunology* / Q000378:metabolism / Q000473:pathology / Q000556:secondary*; D058950:Melanoma-Specific Antigens; D008969:Molecular Sequence Data; D009363:Neoplasm Proteins / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism*; D010446:Peptide Fragments / Q000276:immunology / Q000378:metabolism; D011110:Polymorphism, Genetic / Q000276:immunology; D014407:Tumor Cells, Cultured
chemical_list: D000951:Antigens, Neoplasm; D000939:Epitopes; D015235:HLA-B Antigens; D015236:HLA-C Antigens; C072011:MAGEA1 protein, human; C072012:MAGEB2 protein, human; D058950:Melanoma-Specific Antigens; D009363:Neoplasm Proteins; D010446:Peptide Fragments