1. Identification of a promiscuous HLA DR–restricted T-cell epitope derived from the inhibitor of apoptosis protein survivin
- Author
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Piesche, Matthias, Hildebrandt, York, Zettl, Florian, Chapuy, Björn, Schmitz, Marc, Wulf, Gerald, Trümper, Lorenz, and Schroers, Roland
- Subjects
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CELLS , *APOPTOSIS , *CELL death , *T cells - Abstract
Summary: The inhibitor of apoptosis protein survivin is a promising tumor-associated antigen specifically recognized by CD8+ cytotoxic effector T-lymphocytes (CTL). To improve current vaccines that aim to induce survivin-specific CTL, it is necessary to study the role of CD4+ T-helper (TH) and CD4+ T-regulatory (Treg) cells. Because both TH and Treg cells recognize antigens in the context of HLA-class II molecules, identification of HLA class II–associated peptide epitopes from survivin is required. Here, we analyzed T-cell responses against survivin using synthetic peptides predicted to serve as HLA-DR–restricted epitopes. Six peptides were shown to induce CD4+ T-cell responses, restricted by HLA-DR molecules. For one peptide epitope, SVN10, T-cell clones were demonstrated to be capable of recognizing naturally processed antigen. SVN10-specific T cells could be stimulated from the blood of healthy individuals and cancer patients with multiple HLA-DR genotypes. Thus the identified SVN10 epitope can be used to study the role of CD4+ TH and Treg cells in immune responses and possibly be included in a multivalent peptide vaccine against survivin. [Copyright &y& Elsevier]
- Published
- 2007
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