title: A simple and efficient method for the monitoring of antigen-specific T cell responses using peptide pool arrays in a modified ELISpot assay.
abstract: In this study, we describe a simple and efficient method for both the monitoring of antigen-specific CD4 and CD8 T cell responses as well as the identification of novel CD4 and CD8 T cell epitopes using a modified ELISpot assay and pools of 20mer peptides. We have demonstrated that pools containing as many as 64 20mer peptides may be used to screen for CD4 and CD8 T cell responses to HPV16 L1, E1, and E7 in mice. Using arrays of pools of overlapping 20mer peptides, we have identified novel CD4 and CD8 epitopes in both HPV16L1 and HPV16E1 which are presented in Balb/c mice. We have further shown that the use of 20mer peptides is equivalent to using minimal 9mer epitopes for the stimulation of CD8 T cell responses in our assay. While our experiments are conducted in mice, the use of peptide pool arrays allows for the identification of epitope-specific responses using far fewer cells than is required for testing a panel of overlapping peptides individually, making this strategy particularly useful in clinical settings where immune cells may be limiting.
authors.affiliation: Department of Virus and Cell Biology, Merck Research Labs, WP 16-215, PO Box 4, West Point, PA 19486, USA. timothy_tobery@merck.com
authors.forename: T W
authors.initials: TW
authors.lastname: Tobery
authors.forename: S
authors.initials: S
authors.lastname: Wang
authors.forename: X M
authors.initials: XM
authors.lastname: Wang
authors.forename: M P
authors.initials: MP
authors.lastname: Neeper
authors.forename: K U
authors.initials: KU
authors.lastname: Jansen
authors.forename: W L
authors.initials: WL
authors.lastname: McClements
authors.forename: M J
authors.initials: MJ
authors.lastname: Caulfield
mesh_terms: D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D036022:Capsid Proteins; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D018604:Epitope Mapping; D018984:Epitopes, T-Lymphocyte / Q000235:genetics / Q000276:immunology; D006801:Humans; D007158:Immunologic Techniques; D007371:Interferon-gamma / Q000096:biosynthesis; D051379:Mice; D008807:Mice, Inbred BALB C; D015513:Oncogene Proteins / Q000235:genetics / Q000276:immunology*; D009856:Oncogene Proteins, Viral / Q000235:genetics / Q000276:immunology*; D050725:Papillomavirus E7 Proteins; D010455:Peptides / Q000276:immunology
chemical_list: D036022:Capsid Proteins; C093478:E1 protein, Human papillomavirus 16; D018984:Epitopes, T-Lymphocyte; D015513:Oncogene Proteins; D009856:Oncogene Proteins, Viral; D050725:Papillomavirus E7 Proteins; D010455:Peptides; C059731:oncogene protein E7, Human papillomavirus type 16; C063317:L1 protein, Human papillomavirus type 16; D007371:Interferon-gamma