Direct measurement of T cell receptor affinity and sequence from naïve antiviral T cells
Science translational medicine, 2016•science.org
T cells recognize and kill a myriad of pathogen-infected or cancer cells using a diverse set of
T cell receptors (TCRs). The affinity of TCR to cognate antigen is of high interest in adoptive
T cell transfer immunotherapy and antigen-specific T cell repertoire immune profiling
because it is widely known to correlate with downstream T cell responses. We introduce the
in situ TCR affinity and sequence test (iTAST) for simultaneous measurement of TCR affinity
and sequence from single primary CD8+ T cells in human blood. We demonstrate that the …
T cell receptors (TCRs). The affinity of TCR to cognate antigen is of high interest in adoptive
T cell transfer immunotherapy and antigen-specific T cell repertoire immune profiling
because it is widely known to correlate with downstream T cell responses. We introduce the
in situ TCR affinity and sequence test (iTAST) for simultaneous measurement of TCR affinity
and sequence from single primary CD8+ T cells in human blood. We demonstrate that the …
T cells recognize and kill a myriad of pathogen-infected or cancer cells using a diverse set of T cell receptors (TCRs). The affinity of TCR to cognate antigen is of high interest in adoptive T cell transfer immunotherapy and antigen-specific T cell repertoire immune profiling because it is widely known to correlate with downstream T cell responses. We introduce the in situ TCR affinity and sequence test (iTAST) for simultaneous measurement of TCR affinity and sequence from single primary CD8+ T cells in human blood. We demonstrate that the repertoire of primary antigen-specific T cells from pathogen-inexperienced individuals has a surprisingly broad affinity range of 1000-fold composed of diverse TCR sequences. Within this range, samples from older individuals contained a reduced frequency of high-affinity T cells compared to young individuals, demonstrating an age-related effect of T cell attrition that could cause holes in the repertoire. iTAST should enable the rapid selection of high-affinity TCRs ex vivo for adoptive immunotherapy and measurement of T cell response for immune monitoring applications.
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