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- W1966292234 abstract "Artificial T cell receptor (TCR) ligands can be used to direct virus-specific cytotoxic T lymphocytes (CTL) towards tumor cells. Because of their size, these constructs may differ from cognate peptides in their ability to induce T cell activation. We here analysed signalling outcomes upon synapse formation between human cytomegalovirus (CMV)-specific CTL and chronic lymphocytic leukemia (CLL) cells through targeted complexes (TC) containing anti-CD20 single-chain variable fragment and biotinylated major histocompatibility complex class I molecules presenting peptides from CMVpp65. TC coated CLL cells were effectively lysed by CMVpp65-specific CTL but induced less interferon gamma (IFN-gamma) production than peptide loaded targets. Confocal microscopy revealed that TC induced a redistribution of TCR/CD3 but not CD2 towards the immunological synapse. Furthermore, morphological examination of immunological synapses showed smaller and 'patchy' interactions between TC coated B cells and CTL as compared with peptide coated targets. Finally, pre-incubation of CTL with CD2 antibodies led to an Fc-dependent redistribution of CD2 into TC-induced synapses and restored IFN-gamma production by CMV-specific CTL. Thus, redistribution of CD2 towards the immunological synapse appears to be essential for full T cell activation. However, CD2 triggering is not required for efficient lysis of tumor cells, demonstrating that CTL require only minimal stimulation to release their cytotoxic content." @default.
- W1966292234 created "2016-06-24" @default.
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- W1966292234 date "2008-01-01" @default.
- W1966292234 modified "2023-09-26" @default.
- W1966292234 title "Adequate synapse formation between leukemic B cells and effector T cells following stimulation with artificial TCR ligands" @default.
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- W1966292234 doi "https://doi.org/10.1080/10428190802195430" @default.
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