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- W1979966185 abstract "Several reports have shown that burn injury primes the immune system for an early and vigorous proinflammatory CD4 T cell response, suggesting that injury might signal CD4 T cell activation. We addressed this possibility by investigating changes in CD4 T cell activation marker expression, proliferation, and T cell receptor (TCR) usage at several early time points after burn injury. Using a sensitive flow cytometry approach to measure changes in the expression of Ki-67 antigen, a nuclear protein detected only in proliferating cells, we observed an early burst of proliferation by lymph node, but not spleen, CD4 T cells 12 h after burn injury. In contrast, mice that were treated with the bacterial superantigen staphylococcal enterotoxin B (SEB) as a positive control for in vivo T cell activation did not show this early proliferation. Instead, we observed a significant increase in proliferating lymph node and spleen CD4 and CD8 T cells by 3 days after SEB treatment. Burn injury induced higher cell surface CD25 and CD152 expression on lymph node CD4 T cells, whereas SEB treatment increased CD25 and CD69 expression on CD4 and CD8 T cells. Finally, we found that burn injury induced a proliferative response at 12 h by an oligoclonal subset of TCR Vbeta-chain-expressing CD4 T cells (Vbeta4, Vbeta6, Vbeta11, and Vbeta14). Interestingly, CD4 T cells expressing the Vbeta11-TCR remained significantly increased in the lymph nodes 3 days after burn injury. Taken together, these findings indicate that burn injury induces an early proliferation and activation of CD4 T cells in the regional lymph nodes and that these proliferating cells show restricted TCR Vbeta-chain usage consistent with the idea that injury triggers an early T cell activation signal." @default.
- W1979966185 created "2016-06-24" @default.
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- W1979966185 date "2006-02-01" @default.
- W1979966185 modified "2023-10-16" @default.
- W1979966185 title "BURN INJURY INDUCES AN EARLY ACTIVATION RESPONSE BY LYMPH NODE CD4+ T CELLS" @default.
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- W1979966185 doi "https://doi.org/10.1097/01.shk.0000190824.51653.32" @default.
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