title: Oligoclonal T-cell receptor usage of melanocyte differentiation antigen-reactive T cells in stage IV melanoma patients.
abstract: Ex vivo ELISPOT analysis of peripheral blood lymphocytes obtained from stage IV melanoma patients demonstrated reactivity against peptides derived from MART-1 and gp100. However, the number of reactive T cells was < 1% that of total lymphocytes as detected by flow cytometry using tetrameric MHC/peptide complexes. Despite this low frequency, we were able to directly isolate these populations ex vivo by means of magnetic beads coated with MHC/peptide complexes and to subject these cells to T-cell receptor clonotype mapping. This analysis revealed that the MART-1/A*0201- and gp100/A*0201-reactive T-cell populations are composed of oligoclonal T cells that engage several T-cell receptor beta chain families. Longitudinal studies using this approach may result in a better correlation between T-cell reactivity and the course of neoplastic disease.
authors.affiliation: Department of Dermatology, Julius Maximilians-University, Würzburg, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Schrama
authors.forename: M H
authors.initials: MH
authors.lastname: Andersen
authors.forename: P
authors.initials: P
authors.lastname: Terheyden
authors.forename: L
authors.initials: L
authors.lastname: Schrøder
authors.forename: L O
authors.initials: LO
authors.lastname: Pedersen
authors.forename: P
authors.initials: P
authors.lastname: thor Straten
authors.forename: J C
authors.initials: JC
authors.lastname: Becker
mesh_terms: D000368:Aged; D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor / Q000276:immunology; D002999:Clone Cells; D004591:Electrophoresis, Polyacrylamide Gel; D018984:Epitopes, T-Lymphocyte / Q000276:immunology; D005434:Flow Cytometry; D015234:HLA-A Antigens / Q000276:immunology; D006801:Humans; D058965:MART-1 Antigen; D008297:Male; D008545:Melanoma / Q000276:immunology* / Q000473:pathology; D008562:Membrane Glycoproteins / Q000276:immunology; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000276:immunology*; D009367:Neoplasm Staging; D012334:RNA, Neoplasm / Q000235:genetics / Q000378:metabolism; D011948:Receptors, Antigen, T-Cell / Q000235:genetics / Q000276:immunology*; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics / Q000276:immunology; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D058951:gp100 Melanoma Antigen
chemical_list: D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; D018984:Epitopes, T-Lymphocyte; D015234:HLA-A Antigens; D058965:MART-1 Antigen; C548667:MLANA protein, human; D008562:Membrane Glycoproteins; D009363:Neoplasm Proteins; C548637:PMEL protein, human; D012334:RNA, Neoplasm; D011948:Receptors, Antigen, T-Cell; D016693:Receptors, Antigen, T-Cell, alpha-beta; D058951:gp100 Melanoma Antigen