title: Peptide-specific CTL in tumor infiltrating lymphocytes from metastatic melanomas expressing MART-1/Melan-A, gp100 and Tyrosinase genes: a study in an unselected group of HLA-A2.1-positive patients.
abstract: Peptide specificity of cultured tumor-infiltrating lymphocytes (TIL) was systematically investigated in a group of HLA-A2.1+ metastatic melanoma patients consecutively referred to our department for surgical treatment. Seven samples from 6 patients were studied. All surgical specimens showed evidence of gp 100, MART-1/Melan-A and Tyrosinase gene expression as detectable by reverse PCR (rPCR). Cultured TIL from 2 patients displayed cytotoxic activity against autologous or HLA-matched EBV-transformed cells previously pulsed with MART-1/Melan-A27-35 peptide. In contrast, no CTL activity against gp100(280-288) or tyrosinase1-9 peptides could be observed. TIL were then repeatedly stimulated in vitro with the same peptides. After 6 restimulation courses at weekly intervals, specific recognition of gp100(280-288) and MART-1/Melan-A peptides was detectable in 3 and 5 TIL populations, respectively. In one case Tyrosinase1-9-specific CTL could be demonstrated. Two TIL populations from metastases resected from a melanoma patient at 6 months' distance showed a different peptide specificity pattern, and no specific CTL could be generated from simultaneously sampled peripheral blood mononuclear cells (PBMC). All peptide-specific CTL populations also displayed significant cytotoxic activity against HLA-A2.1 matched melanoma cell lines expressing the antigens under investigation. Our data indicate that CTL specific for MART-Melan-A27-35, gp100(280-288) or Tyrosinase1-9 peptides could be expanded with varying frequency from TIL derived from 4 out of 6 HLA-A2.1+ patients whose tumors expressed the genes encoding these tumor-associated antigens (TAA).
authors.affiliation: Department of Surgery, University of Basel, Switzerland.
authors.forename: G C
authors.initials: GC
authors.lastname: Spagnoli
authors.forename: C
authors.initials: C
authors.lastname: Schaefer
authors.forename: T E
authors.initials: TE
authors.lastname: Willimann
authors.forename: T
authors.initials: T
authors.lastname: Kocher
authors.forename: A
authors.initials: A
authors.lastname: Amoroso
authors.forename: A
authors.initials: A
authors.lastname: Juretic
authors.forename: M
authors.initials: M
authors.lastname: Zuber
authors.forename: U
authors.initials: U
authors.lastname: Luscher
authors.forename: F
authors.initials: F
authors.lastname: Harder
authors.forename: M
authors.initials: M
authors.lastname: Heberer
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D000595:Amino Acid Sequence; D000951:Antigens, Neoplasm / Q000096:biosynthesis / Q000235:genetics*; D001483:Base Sequence; D002472:Cell Transformation, Viral; D003602:Cytotoxicity, Immunologic; D000939:Epitopes; D005260:Female; D006098:Granulocytes; D015789:HLA-A2 Antigen / Q000276:immunology*; D004854:Herpesvirus 4, Human; D006801:Humans; D007519:Isoantigens / Q000096:biosynthesis / Q000235:genetics; D008213:Lymphocyte Activation / Q000187:drug effects / Q000276:immunology; D016246:Lymphocytes, Tumor-Infiltrating / Q000276:immunology / Q000378:metabolism / Q000502:physiology*; D008297:Male; D008545:Melanoma / Q000235:genetics* / Q000276:immunology* / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000096:biosynthesis / Q000235:genetics; D008875:Middle Aged; D008969:Molecular Sequence Data; D014442:Monophenol Monooxygenase / Q000096:biosynthesis / Q000235:genetics; D009363:Neoplasm Proteins / Q000096:biosynthesis / Q000235:genetics*; D010446:Peptide Fragments; D010455:Peptides; D010641:Phenotype; D016133:Polymerase Chain Reaction; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology / Q000378:metabolism / Q000502:physiology*; D058951:gp100 Melanoma Antigen
chemical_list: D000951:Antigens, Neoplasm; D000939:Epitopes; D015789:HLA-A2 Antigen; C531098:HNA-4A antigen; D007519:Isoantigens; D008562:Membrane Glycoproteins; D009363:Neoplasm Proteins; C548637:PMEL protein, human; D010446:Peptide Fragments; D010455:Peptides; D058951:gp100 Melanoma Antigen; C548641:gp100(280-288) melanoma antigen peptide; D014442:Monophenol Monooxygenase