Abstract:
:The identification of T cell epitopes that elicit a weak T cell response is technically challenging due to the relatively low resolution of many available screening assays. Peptide immunization can confirm the immunogenicity of a given peptide, however, this also often induces a low frequency response in lymphoid organs. In this report, we use the murine gammaherpesvirus-68 model system to describe a novel technique to enrich for antigen-experienced T cells in vivo as an aid to epitope mapping. Mice are immunized with peptides containing putative epitopes then effector/memory cells which migrate to the lungs are washed out and tested for specificity using intracellular staining for interferon gamma (IFN-gamma). We show that the lung is a site where there are elevated numbers of antigen-experienced T cells and this can be exploited to confirm otherwise low frequency T cell responses. In addition, we identify two novel T cell epitopes in the ORF65 protein of MHV-68 which will be valuable tools in the dissection of the immune response to this model gammaherpesvirus.
journal_name
J Immunol Methodsjournal_title
Journal of immunological methodsauthors
Usherwood EJdoi
10.1016/s0022-1759(02)00106-0keywords:
subject
Has Abstractpub_date
2002-08-01 00:00:00pages
135-42issue
1-2eissn
0022-1759issn
1872-7905pii
S0022175902001060journal_volume
266pub_type
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journal_title:Journal of immunological methods
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journal_title:Journal of immunological methods
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