Differential production of inflammatory chemokines by murine dendritic cell subsets.
Dendritic cells (DC) are efficient antigen presenting cells with the ability to activate naïve T cells. Murine DC represent a heterogeneous population that can be subdivided into distinct subsets, including the conventional DC (cDC) which are either CD4(-)CD8(-) (DN), CD4(+)CD8(-) (CD4+) or CD4(-)CD8(+) (CD8+) subsets and the plasmacytoid DC (pDC), which have different immune regulatory functions. In this study, we investigated the differential expression of genes encoding the inflammatory chemokines Mip-1alpha, Mip-1beta and Rantes, and the secretion of these chemokines, among splenic DC subsets. These chemokine genes were expressed at higher levels by the splenic CD4+ and DN cDC subsets compared with the CD8+ cDC, in both the resting and activated states in vivo. Both the pDC and cDC subsets displayed increases in chemokine secretion in response to a range of toll-like receptor (TLR) stimuli in vitro. Whilst the pDC were the highest producers of Mip-1alpha and Mip-1beta in response to some TLR stimuli, the DN and CD4+ cDC subsets were the superior producers of Rantes. Overall, of the cDC, the CD4+ cDC produced all chemokines most efficiently, both at a basal level, and in response to most TLR stimuli. Thus, we report a new functional difference between the murine splenic cDC subsets, with the CD4+ cDC demonstrating the most efficient production of the inflammatory chemokines Mip-1alpha, Mip-1beta and Rantes.
The Walter and Eliza Hall Institute of Medical Research, 1G, Royal Parade, Parkville, Vic. 3050, Australia.
Anna I
AI
Proietto
Meredith
M
O'Keeffe
Kate
K
Gartlan
Mark D
MD
Wright
Ken
K
Shortman
Li
L
Wu
Mireille H
MH
Lahoud
D000818:Animals; D002454:Cell Differentiation; D054405:Chemokine CCL3; D054407:Chemokine CCL4; D018946:Chemokine CCL5 / Q000378:metabolism; D018925:Chemokines / Q000096:biosynthesis*; D003713:Dendritic Cells / Q000276:immunology* / Q000378:metabolism; D005260:Female; D020869:Gene Expression Profiling; D019402:Macrophage Inflammatory Proteins / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D013154:Spleen / Q000166:cytology / Q000378:metabolism
D054405:Chemokine CCL3; D054407:Chemokine CCL4; D018946:Chemokine CCL5; D018925:Chemokines; D019402:Macrophage Inflammatory Proteins