Naive CD8+ T cells can be activated via dendritic cell 'cross-priming' of antigens obtained exogenously. Dendritic cells cannot cross-prime, however, after systemic activation in vivo, potentially contributing to immunosuppression associated with severe infections.
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Hickman-Miller, H., Yewdell, J. Youth has its privileges: maturation inhibits DC cross-priming. Nat Immunol 7, 125–126 (2006). https://doi.org/10.1038/ni0206-125
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DOI: https://doi.org/10.1038/ni0206-125
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