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Journal Article
Research Support, Non-U.S. Gov't
TIL 2.0: More effective and predictive T-cell products by enrichment for defined antigen specificities.
European Journal of Immunology 2016 June
Adoptive transfer of in vitro-expanded T cells derived from tumor-infiltrating lymphocytes (TILs) in melanoma patients started the era of tumor immunotherapy three decades ago. The approach has demonstrated remarkable clinical responses in several studies since. Reinfusion of TIL-derived T cells represents a highly personalized form of immunotherapy, taking into account the enormous interindividual tumor heterogeneity. However, despite its successes, TIL therapy does not lead to objective clinical responses in all cases. It is thus crucial to find out which tumor antigens are particularly valuable targets and to develop strategies to enhance the reactivity of T-cell products toward them. In this issue of the European Journal of Immunology, Kelderman et al. [Eur. J. Immunol. 2016. 46: 1351-1360] present a platform for the generation of antigen-specific TIL therapy. Combining recently developed technologies for clinical identification and enrichment of antigen-specific CD8(+) T cells, such as MHC Streptamers and UV-mediated peptide exchange, the authors could enrich T-cell populations with defined antigen specificities from melanoma-derived TILs. This T-cell product showed higher reactivity against autologous tumor cell lines than bulk TIL-derived T cells. The novel platform might enable the generation of more effective and predictable TIL-derived T-cell products for future clinical applications.
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