title: Flavivirus-cross-reactive, HLA-DR15-restricted epitope on NS3 recognized by human CD4+ CD8- cytotoxic T lymphocyte clones.
abstract: The role of flavivirus-cross-reactive T lymphocytes in recovery from and pathogenesis of flavivirus infections is not known. In the present paper, we have defined a flavivirus-cross-reactive epitope recognized by two CD4+ CD8- cytotoxic T lymphocyte (CTL) clones, JK4 and JK43. The T cell clones were established from the peripheral blood T lymphocytes of a dengue-4-immune donor, using a limiting-dilution method with dengue-4 antigen. These two T cell clones were cross-reactive for dengue virus types 1, 2, 3 and 4, yellow fever virus and West Nile virus, and recognized NS3 protein. The smallest synthetic peptide recognized by these T cell clones was an identical 9 amino acid peptide which contains amino acids 146 to 154 (VIGLYGNGV) of dengue-4 NS3. HLA-DR15 was the restriction allele for recognition of this epitope by JK4 and JK43. JK4 and JK43 both used T cell receptor V alpha 8, but JK4 used V beta 8 and JK43 used V beta 2. This result indicates that this epitope is recognized by two flavivirus-cross-reactive CD4+ T cell clones which originated from different T cells in vivo.
authors.affiliation: Department of Medicine, University of Massachusetts Medical Center, Worcester 01655, USA.
authors.forename: I
authors.initials: I
authors.lastname: Kurane
authors.forename: Y
authors.initials: Y
authors.lastname: Okamoto
authors.forename: L C
authors.initials: LC
authors.lastname: Dai
authors.forename: L L
authors.initials: LL
authors.lastname: Zeng
authors.forename: M A
authors.initials: MA
authors.lastname: Brinton
authors.forename: F A
authors.initials: FA
authors.lastname: Ennis
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D016827:CD8 Antigens; D002522:Chlorocebus aethiops; D002999:Clone Cells; D003429:Cross Reactions; D004247:DNA; D018604:Epitope Mapping; D005416:Flavivirus / Q000276:immunology*; D006684:HLA-DR Antigens / Q000276:immunology*; D006801:Humans; D008969:Molecular Sequence Data; D020365:RNA Helicases; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000276:immunology; D017386:Sequence Homology, Amino Acid; D012697:Serine Endopeptidases; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D014709:Vero Cells; D017361:Viral Nonstructural Proteins / Q000235:genetics / Q000276:immunology*; D043583:Nucleoside-Triphosphatase; D053487:DEAD-box RNA Helicases; D000085242:Viral Proteases
chemical_list: D016827:CD8 Antigens; D004247:DNA; D006684:HLA-DR Antigens; D020365:RNA Helicases; D016693:Receptors, Antigen, T-Cell, alpha-beta; D012697:Serine Endopeptidases; D017361:Viral Nonstructural Proteins; C060028:NS3 protein, flavivirus; D043583:Nucleoside-Triphosphatase; D053487:DEAD-box RNA Helicases; D000085242:Viral Proteases