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- W1489651318 abstract "Loss of tolerance for autoantigens is a common feature in autoimmune diseases. Bystander T-cell activation is the activation of T cells to produce functional changes through TCR-independent stimulation. Although bystander activation may be related to tolerance loss to multiple autoantigens, the activation mechanism of T cells directed to an autoantigen with limited amount is not clear. We investigated an activation mode of T cells (designated as associator T cells) directed to a suboptimal dose of cognate antigen X in the presence of fully activated T cells (designated as responder T cells) directed to an optimal dose of antigen Y. In in vitro coculture, the activation of associator T cells was dependent on the presentation of antigen X, and soluble factors from activated responder T cells were not sufficient. Therefore, we conclude this activation mode is different from bystander activation and named it extended antigen priming (EAP). T cells with EAP showed a different phenotype compared to conventionally primed cells, suggesting the unique nature of EAP. Intriguingly, EAP was dependent on the CD40-CD40L signaling pathway. Thus, the EAP model is a T-cell activation mode for suboptimal dose of antigen and presumably related to the immune response to autoantigens in autoimmune status." @default.
- W1489651318 created "2016-06-24" @default.
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- W1489651318 date "2015-04-28" @default.
- W1489651318 modified "2023-10-03" @default.
- W1489651318 title "A new T-cell activation mode for suboptimal doses of antigen under the full activation of T cells with different specificity" @default.
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- W1489651318 doi "https://doi.org/10.1002/eji.201444965" @default.
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