Flt3 ligand-generated murine plasmacytoid and conventional dendritic cells differ in their capacity to prime naive CD8 T cells and to generate memory cells in vivo.
Mature dendritic cells (DCs) have the capacity to induce efficient primary T cell response and effector cell differentiation. Thus, these cells are a major tool in the design of various immunotherapeutic protocols. We have tested the capacity of different subsets of matured DCs pulsed with a peptide to induce the differentiation of naive CD8 T cells into memory cells in vivo. Flt3 ligand (FL) induces the differentiation of conventional DCs (cDCs) and plasmacytoid DCs (PDCs) from murine bone marrow precursors in vitro. After maturation, both subsets become strong stimulators of Ag-specific T cell responses in vitro. However, the in vivo T cell stimulatory capacity of these DC subsets has not been studied in detail. In the present study, we demonstrate that mature FL-generated DCs induce efficient peptide-specific CD8 T cell response and memory cell differentiation in vivo. This is mainly due to the cDC subset because the PDC subset induced only a negligible primary CD8 response without detectable levels of memory CD8 T cell differentiation. Thus, in vitro FL-generated mature cDCs, but not PDCs, are potent stimulators of peptide-specific CD8 T cell responses and memory generation in vivo.
Centre d'Etude et de Recherche en Virologie et Immunologie, Institut National de la Santé et de la Recherche Médicale Unité 503, Lyon, France.
Georgi S
GS
Angelov
Martine
M
Tomkowiak
Antoine
A
Marçais
Yann
Y
Leverrier
Jacqueline
J
Marvel
D000818:Animals; D018414:CD8-Positive T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D002450:Cell Communication / Q000187:drug effects; D002454:Cell Differentiation; D003713:Dendritic Cells / Q000145:classification / Q000166:cytology / Q000187:drug effects* / Q000276:immunology*; D006801:Humans; D007156:Immunologic Memory / Q000187:drug effects*; D066298:In Vitro Techniques; D007371:Interferon-gamma / Q000096:biosynthesis; D008565:Membrane Proteins / Q000494:pharmacology*; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D011994:Recombinant Proteins / Q000494:pharmacology
D008565:Membrane Proteins; D011994:Recombinant Proteins; C084881:flt3 ligand protein; D007371:Interferon-gamma