CD8- dendritic cells preferentially cross-present Saccharomyces cerevisiae antigens.
Mouse splenic dendritic cell (DC) subsets possess distinct antigen-presentation abilities. CD8(+) DC are specialized in cross-presentation of antigens to CD8(+) T cells, whereas CD8(-) DC are more efficient in antigen presentation to CD4(+) T cells. In this study, we examined the capacity of CD8(+) and CD8(-) DC subsets to present fungal antigens in MHC class I and II molecules to CD8(+) and CD4(+) T cells, respectively. We used ovalbumin-expressing Saccharomyces cerevisiae (yeast-OVA) as a fungal model system. Both CD8(+) and CD8(-) DC subsets phagocytosed yeast in equal amounts and uptake was mediated via dectin-1. In addition, both DC subsets induced similar OVA-specific CD4(+) T cell proliferation after incubation with yeast-OVA. However, the induction of OVA-specific CD8(+) T cell activation was largely restricted to the CD8(-) DC subset. Furthermore, only CD8(-) DC produced cytokines such as IL-10 and TNF-alpha and increased IL-23p19 and IL-23p40 mRNA levels in response to yeast. Our results strongly suggest that DC subsets have different functions in the elicitation of adaptive immune responses in vivo.
Backer
Ronald
R
Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands.
van Leeuwen
Fred
F
Kraal
Georg
G
den Haan
Joke M M
JM
D000818:Animals; D000946:Antigens, Fungal / Q000276:immunology* / Q000378:metabolism; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D016827:CD8 Antigens / Q000096:biosynthesis / Q000235:genetics* / Q000378:metabolism; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D045142:Cross-Priming / Q000276:immunology*; D016207:Cytokines / Q000096:biosynthesis; D003713:Dendritic Cells / Q000276:immunology* / Q000378:metabolism; D005260:Female; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008822:Mice, Transgenic; D012441:Saccharomyces cerevisiae / Q000276:immunology*
D000946:Antigens, Fungal; D016827:CD8 Antigens; D016207:Cytokines