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• W2144262605 abstract "Abstract Numerous clinical and epidemiological studies link enteroviruses such as the Coxsackie virus group with the autoimmune disease type 1 diabetes mellitus (DM). In addition, there are reports that patients with type 1 DM are characterized by skewing of TCR Vβ chain selection among peripheral blood and intraislet T lymphocytes. To examine these issues, we analyzed TCR Vβ chain-specific up-regulation of the early T cell activation marker, CD69, on CD4 T cells after incubation with Coxsackievirus B4 (CVB4) Ags. CD4 T cells bearing the Vβ chains 2, 7, and 8 were the most frequently activated by CVB4. Up-regulation of CD69 by different TCR families was significantly more frequent in new onset type 1 DM patients (p = 0.04), 100% of whom (n = 8) showed activation of CD4 T cells bearing Vβ8, compared with 50% of control subjects (n = 8; p = 0.04). T cell proliferation after incubation with CVB4 Ags required live, nonfixed APCs, suggesting that the selective expansion of CD4 T cells with particular Vβ chains resulted from conventional antigen processing and presentation rather than superantigen activity. Heteroduplex analysis of TCR Vβ chain usage after CVB4 stimulation indicated a relatively polyclonal, rather than oligo- or monoclonal response to viral Ags. These results provide evidence that new-onset patients with type 1 DM and healthy controls are primed against CVB4, and that CD4 T cell responses to the virus have a selective TCR Vβ chain usage which is driven by viral Ags rather than a superantigen." @default.
• W2144262605 created "2016-06-24" @default.
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• W2144262605 date "2001-09-15" @default.
• W2144262605 modified "2023-09-27" @default.
• W2144262605 title "T Cell Activation by Coxsackievirus B4 Antigens in Type 1 Diabetes Mellitus: Evidence for Selective TCR Vβ Usage Without Superantigenic Activity" @default.
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• W2144262605 doi "https://doi.org/10.4049/jimmunol.167.6.3513" @default.
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