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NY-ESO-1 antigen-reactive T cell receptors exhibit diverse therapeutic capability

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Item Type:Article
Title:NY-ESO-1 antigen-reactive T cell receptors exhibit diverse therapeutic capability
Creators Name:Sommermeyer, D. and Conrad, H. and Krönig, H. and Gelfort, H. and Bernhard, H. and Uckert, W.
Abstract:The cancer-testis antigen NY-ESO-1 has been used as a target for different immunotherapies like vaccinations and adoptive transfer of antigen-specific cytotoxic T cells, as it is expressed in various tumor types and has limited expression in normal cells. The in vitro generation of T cells with defined antigen specificity by T cell receptor (TCR) gene transfer is an established method to create cells for immunotherapy. However, an extensive characterization of TCR which are candidates for treatment of patients is crucial for successful therapies. The TCR has to be efficiently expressed, their affinity to the desired antigen should be high enough to recognize low amounts of endogenously processed peptides on tumor cells, and the TCR should not be cross-reactive to other antigens. We characterized three NY-ESO-1 antigen-reactive cytotoxic T lymphocyte (CTL) clones which were generated by different approaches of T cell priming (autologous, allogeneic), and transferred their TCR into donor T cells for more extensive evaluations. Although one TCR most efficiently bound MHC-multimers loaded with NY-ESO-1 peptide, T cells expressing this transgenic TCR were not able to recognize endogenously processed antigen. A second TCR recognized HLA-A2 independent of the bound peptide beside of its much stronger recognition of NY-ESO-1 bound to HLA-A2. A third TCR displayed an intermediate but peptide-specific performance in all functional assays and, therefore, is the most promising candidate TCR for further clinical development. Our data indicate that multiple parameters of TCR gene-modified T cells have to be evaluated to identify an optimal TCR candidate for adoptive therapy.
Keywords:Tumor Immunity, Human, Cytotoxic T Cells, T Cell Receptor, NY-ESO-1
Source:International Journal of Cancer
Page Range:1360-1367
Date:15 March 2013
Official Publication:https://doi.org/10.1002/ijc.27792
PubMed:View item in PubMed

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