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• W4313333855 endingPage "602" @default.
• W4313333855 startingPage "595" @default.
• W4313333855 abstract "Abstract Drugs like sulfamethoxazole (SMX) or lidocaine can be presented to specific human αβ+ T cell clones (TCC) by undergoing a noncovalent association with MHC-peptide complexes on HLA-matched APCs. For a better understanding of the molecular basis of the recognition of such drugs by specific TCC, we investigated 1) the fine specificity of the recognizing TCR, 2) the dose-response relationship for the induction of proliferation or cytokine production, and 3) the mechanism of TCR triggering. For that purpose, we tested the reactivity of 11 SMX-specific CD4+ TCC and 2 SMX-specific CD8+ TCC to a panel of 13 different sulfonamide derivatives bearing the same core structure. Five of 13 clones recognized only SMX, while all other clones were responding to as many as 6 different compounds. Some of the compounds needed up to two orders of magnitude higher concentrations than SMX to stimulate TCC, thereby displaying features of weak agonists. Different clones showed clear differences in the minimal drug concentration required for the induction of a proliferative response. Therefore, weaker or stronger agonistic properties were not a characteristic of a given sulfonamide derivative but rather an intrinsic property of the reacting TCR. Finally, the number of down-regulated TCRs was a logarithmic function of the ligand concentration, implicating that specific T cells were activated by serial TCR engagement. Our data demonstrate that, despite the special way of presentation, nonpeptide Ag like drugs appear to interact with the TCR of specific T cells in a similar way as peptide Ags." @default.
• W4313333855 created "2023-01-06" @default.
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• W4313333855 date "1999-01-01" @default.
• W4313333855 modified "2023-10-16" @default.
• W4313333855 title "Interaction of Sulfonamide Derivatives with the TCR of Sulfamethoxazole-Specific Human αβ+ T Cell Clones" @default.
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• W4313333855 doi "https://doi.org/10.4049/jimmunol.162.1.595" @default.
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