title: Mapping and restriction of a dominant viral CD4+ T cell core epitope by both MHC class I and MHC class II.
abstract: Virus-specific CD4(+) T cells contribute to effective virus control through a multiplicity of mechanisms including direct effector functions as well as "help" for B cell and CD8(+) T cell responses. Here, we have used the lymphocytic choriomeningitis virus (LCMV) system to assess the minimal constraints of a dominant antiviral CD4(+) T cell response. We report that the core epitope derived from the LCMV glycoprotein (GP) is 11 amino acids in length and provides optimal recognition by epitope-specific CD4(+) T cells. Surprisingly, this epitope is also recognized by LCMV-specific CD8(+) T cells and thus constitutes a unique viral determinant with dual MHC class I- and II-restriction.
authors.affiliation: Barbara Davis Center, University of Colorado at Denver and Health Sciences Center, 12801 East 17th Avenue, Aurora CO, USA.
authors.forename: Dirk
authors.initials: D
authors.lastname: Homann
authors.forename: Hanna
authors.initials: H
authors.lastname: Lewicki
authors.forename: David
authors.initials: D
authors.lastname: Brooks
authors.forename: Jens
authors.initials: J
authors.lastname: Eberlein
authors.forename: Valerie
authors.initials: V
authors.lastname: Mallet-Designé
authors.forename: Luc
authors.initials: L
authors.lastname: Teyton
authors.forename: Michael B A
authors.initials: MB
authors.lastname: Oldstone
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018604:Epitope Mapping; D018984:Epitopes, T-Lymphocyte / Q000737:chemistry / Q000276:immunology*; D015395:Histocompatibility Antigens Class I / Q000276:immunology*; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D016056:Immunodominant Epitopes / Q000276:immunology*; D008217:Lymphocytic choriomeningitis virus / Q000276:immunology; D051379:Mice; D008969:Molecular Sequence Data; D011948:Receptors, Antigen, T-Cell / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology
chemical_list: D018984:Epitopes, T-Lymphocyte; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II; D016056:Immunodominant Epitopes; D011948:Receptors, Antigen, T-Cell