A novel HLA (HLA-A*0201) transgenic rabbit model for preclinical evaluation of human CD8+ T cell epitope-based vaccines against ocular herpes

J Immunol. 2010 Mar 1;184(5):2561-71. doi: 10.4049/jimmunol.0902322. Epub 2010 Feb 1.

Abstract

We introduced a novel humanized HLA-A*0201 transgenic (HLA Tg) rabbit model to assess the protective efficacy of a human CD8(+) T cell epitope-based vaccine against primary ocular herpes infection and disease. Each of the three immunodominant human CD8(+) T cell peptide epitopes from HSV-1 glycoprotein D (gD(53-61), gD(70-78), and gD(278-286)) were joined with a promiscuous human CD4(+) T cell peptide epitope (gD(49-82)) to construct three separate pairs of CD4-CD8 peptides. Each CD4-CD8 peptide pair was then covalently linked to an N(epsilon)-palmitoyl-lysine residue via a functional base lysine amino group to construct CD4-CD8 lipopeptides. HLA Tg rabbits were immunized s.c. with a mixture of the three CD4-CD8 HSV-1 gD lipopeptides. The HSV-gD-specific T cell responses induced by the mixture of CD4-CD8 lipopeptide vaccine and the protective efficacy against acute virus replication and ocular disease were determined. Immunization induced HSV-gD(49-82)-specific CD4(+) T cells in draining lymph node (DLN); induced HLA-restricted HSV-gD(53-61), gD(70-78), and gD(278-286)-specific CD8(+) T cells in DLN, conjunctiva, and trigeminal ganglia and reduced HSV-1 replication in tears and corneal eye disease after ocular HSV-1 challenge. In addition, the HSV-1 epitope-specific CD8(+) T cells induced in DLNs, conjunctiva, and the trigeminal ganglia were inversely proportional with corneal disease. The humanized HLA Tg rabbits appeared to be a useful preclinical animal model for investigating the immunogenicity and protective efficacy of human CD8(+) T cell epitope-based prophylactic vaccines against ocular herpes. The relevance of HLA Tg rabbits for future investigation of human CD4-CD8 epitope-based therapeutic vaccines against recurrent HSV-1 is discussed.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Animals, Genetically Modified
  • CD4-Positive T-Lymphocytes / immunology
  • CD4-Positive T-Lymphocytes / metabolism
  • CD8-Positive T-Lymphocytes / immunology
  • CD8-Positive T-Lymphocytes / metabolism
  • Conjunctiva / immunology
  • Conjunctiva / metabolism
  • Conjunctiva / virology
  • Cornea / immunology
  • Cornea / metabolism
  • Cornea / virology
  • Epitopes, T-Lymphocyte / chemistry
  • Epitopes, T-Lymphocyte / genetics
  • Epitopes, T-Lymphocyte / immunology*
  • HLA-A Antigens / genetics
  • HLA-A Antigens / immunology*
  • HLA-A2 Antigen
  • Herpes Simplex Virus Vaccines / administration & dosage
  • Herpes Simplex Virus Vaccines / genetics
  • Herpes Simplex Virus Vaccines / immunology*
  • Herpesvirus 1, Human / immunology*
  • Humans
  • Immunization
  • Keratitis, Herpetic / immunology*
  • Keratitis, Herpetic / prevention & control
  • Keratitis, Herpetic / virology
  • Lymph Nodes / immunology
  • Lymph Nodes / metabolism
  • Lymph Nodes / virology
  • Lysine / analogs & derivatives
  • Lysine / chemistry
  • Molecular Sequence Data
  • Peptide Fragments / chemistry
  • Peptide Fragments / genetics
  • Peptide Fragments / immunology
  • Rabbits
  • Trigeminal Ganglion / immunology
  • Trigeminal Ganglion / metabolism
  • Trigeminal Ganglion / virology
  • Viral Envelope Proteins / chemistry
  • Viral Envelope Proteins / genetics
  • Viral Envelope Proteins / immunology

Substances

  • Epitopes, T-Lymphocyte
  • HLA-A Antigens
  • HLA-A*02:01 antigen
  • HLA-A2 Antigen
  • Herpes Simplex Virus Vaccines
  • N(epsilon)-palmitoyllysine
  • Peptide Fragments
  • Viral Envelope Proteins
  • glycoprotein D, Human herpesvirus 1
  • Lysine