A critical role of T cell antigen receptor-transduced MHC class I-restricted helper T cells in tumor protection |
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| Authors: | Morris Emma C Tsallios Aristotle Bendle Gavin M Xue Shao-An Stauss Hans J |
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| Affiliation: | Department of Immunology, Imperial College, Du Cane Road, London W12 0NN, United Kingdom. emma.morris@medsch.ucl.ac.uk |
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| Abstract: | Adoptive transfer of antigen-specific CD4(+) and CD8(+) T cells is one of the most efficient forms of cancer immunotherapy. However, the isolation of antigen-specific CD4(+) T cells is limited because only few tumor-associated helper epitopes are identified. Here, we used T cell antigen receptor gene transfer to target CD4(+) T cells against an MHC class I-presented epitope of a model tumor antigen. IFN-gamma-producing CD4(+) T cells were unable to expand in vivo and to provide help for tumor rejection. In contrast, CD4(+) T cells producing high levels of IL-2 expanded in vivo, provided help for cytotoxic T lymphocyte-mediated tumor rejection, and developed T cell memory. The data demonstrate in vivo synergy between T cell antigen receptor-transduced CD4(+) and CD8(+) T cells specific for the same epitope resulting in long-term tumor protection. |
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| Keywords: | T cell antigen receptor gene transfer tumor immunotherapy |
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