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CTL priming by CD8(+) and CD8(-) dendritic cells in vivo
1Basel Institute for Immunology, Basel, Switzerland. Ruedl@bii.ch
Two distinct developmental pathways are driving the formation of myeloid- and lymphoid-related dendritic cells (DC) which differ in anatomical localization and phenotype. In terms of function, it has been hypothesized that only the myeloid-related CD8(-) DC are able to initiate immune responses, whereas the lymphoid-related CD8(+) DC have been suggested to induce tolerance. Here we show that both subsets activate CD8(+) T cells in vitro and induce protective anti-viral CTL responses in vivo. Thus, vaccine strategies using peptide-pulsed DC do not have to take into account DC subsets for priming.
Two distinct developmental pathways are driving the formation of myeloid- and lymphoid-related dendritic cells (DC) which differ in anatomical localization and phenotype. In terms of function, it has been hypothesized that only the myeloid-related CD8(-) DC are able to initiate immune responses, whereas the lymphoid-related CD8(+) DC have been suggested to induce tolerance. Here we show that both subsets activate CD8(+) T cells in vitro and induce protective anti-viral CTL responses in vivo. Thus, vaccine strategies using peptide-pulsed DC do not have to take into account DC subsets for priming.