Epitopes described in "CD8 CTL from genital herpes simplex lesions: recognition of viral tegument and immediate early proteins and lysis of infected cutaneous cells."

Article Authors:D M Koelle; H B Chen; M A Gavin; A Wald; W W Kwok; L Corey
Article Title:CD8 CTL from genital herpes simplex lesions: recognition of viral tegument and immediate early proteins and lysis of infected cutaneous cells.
Reference Detail
Reference ID:1004296
Abstract:HSV-2 causes chronic infections. CD8 CTL may play several protective roles, and stimulation of a CD8 response is a rational element of vaccine design for this pathogen. The viral Ags recognized by CD8 T cells are largely unknown. It has been hypothesized that HSV inhibition of TAP may favor recognition of virion input proteins or viral immediate early proteins. We tested this prediction using HSV-specific CD8 CTL clones obtained from genital HSV-2 lesions. Drug and replication block experiments were consistent with specificity for the above-named classes of viral proteins. Fine specificity was determined by expression cloning using molecular libraries of viral DNA, and peptide epitopes recognized at nanomolar concentrations were identified. Three of four clones recognized the viral tegument proteins encoded by genes UL47 and UL49. These proteins are transferred into the cytoplasm on virus entry. Processing of the tegument Ag-derived epitopes was TAP dependent. The tegument-specific CTL were able to lyse HLA class I-appropriate fibroblasts after short times of infection. Lysis of keratinocytes required longer infection and pretreatment with IFN-gamma. Another clone recognized an immediate early protein, ICP0. Lymphocytes specific for these lesion-defined epitopes could be reactivated from the PBMC of additional subjects. These data are consistent with an influence of HSV immune evasion genes upon the selection of proteins recognized by CD8 CTL in lesions. Tegument proteins, identified for the first time as Ags recognized by HSV-specific CD8 CTL, are rational candidate vaccine compounds.
Affiliations:Department of Medicine, University of Washington, Seattle, WA 98195, USA. viralimm@u.washington.edu
Reference Type:Literature
PubMed ID:11238653
Journal:J Immunol
Journal Volume:166
Article Pages:4049-58
Journal ISSN:0022-1767
Article Chemical List:ATP-Binding Cassette Transporters;Antigens, Viral;Epitopes, T-Lymphocyte;HLA Antigens;Immediate-Early Proteins;Viral Fusion Proteins
Article MeSH List:ATP-Binding Cassette Transporters(physiology); Alleles; Animals; Antigen Presentation; Antigens, Viral(biosynthesis; immunology; metabolism); CD8-Positive T-Lymphocytes(immunology; virology); COS Cells; Clone Cells; Cytotoxicity, Immunologic; Epitopes, T-Lymphocyte(genetics; immunology; metabolism); Fibroblasts(immunology; virology); HLA Antigens(genetics); Herpes Genitalis(immunology; pathology; virology); Herpesvirus 2, Human(genetics; immunology); Humans; Immediate-Early Proteins(biosynthesis; immunology; metabolism); Keratinocytes(immunology; virology); Leukocytes, Mononuclear(immunology; virology); Skin(immunology; virology); T-Lymphocytes, Cytotoxic(immunology; virology); Viral Fusion Proteins(immunology; metabolism)
Curation Last Updated:2014-10-03 20:32:22