Abstract
Interactions with self–major histocompatibility complex molecules on dendritic cells (DCs) are important for the survival of mature CD4+ T cells. We have followed the DC-mediated signal from the T cell surface to the nucleus and identified a pattern of activation that correlates with increased in vitro survival. This response is induced exclusively by DCs and is likely associated with a modulation of the T cell activation threshold. We have also found that DC-mediated activation results in antigen-independent cytokine gene expression, which points to a new role for DCs in shaping the cytokine milieu. Such antigen-independent activation of T cells may play a role in protective immunity, but may also induce and perpetuate autoimmune states such as multiple sclerosis.
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Acknowledgements
We thank H. McFarland for critical reading of the manuscript. K. P. W. was supported by a grant from the Deutsche Forschungsgemeinschaft (Wa 1343/1-1).
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Kondo, T., Cortese, I., Markovic-Plese, S. et al. Dendritic cells signal T cells in the absence of exogenous antigen. Nat Immunol 2, 932–938 (2001). https://doi.org/10.1038/ni711
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DOI: https://doi.org/10.1038/ni711
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