Table 1.
Nomenclature, phenotype and in vivo functions of monocyte and DC subsets during MCMV infection.
Name | Markers | Functions during MCMV infection | References | ||
---|---|---|---|---|---|
Infection* | Innate immunity | Adaptive Immunity | |||
XCR1+ cDC** | Lin− CD11b− CD11chigh XCR1+ CD24+ CD8α+/− CD103+/− | Yes, <5% | IL-12, IL-15 … NK cell activation | Priming of antiviral CD8 T cells in acute infection | Andrews et al., 2003; Dalod et al., 2003; Torti et al., 2011b; Busche et al., 2013 |
CD11b+ cDC | Lin− CD64− MerTK−CD11chigh CD11b+ | Yes, <<1% | IL-12, IL-15 … NK cell activation | Control of CD4 T cell priming? | Dalod et al., 2003; Andoniou et al., 2005 |
pDC | Lin− CD11b− CD11cint Bst2+ SiglecH+ | No | IFN-I, IL-12, TNF, CCL3 … NK cell activation | Dispensable? | Asselin-Paturel et al., 2001; Dalod et al., 2002, 2003; Krug et al., 2004; Scheu et al., 2008; Zucchini et al., 2008a; Swiecki et al., 2010 |
Classical monocytes/MDSC/MoDC*** | Lin− MerTK− CD11b+ Ly6Chigh CCR2+ CD64+/low | No | iNOS, TNF, IL-15? … recruitment in the liver | Dampening of CD8 T cell responses to prevent immunopathology? | Daley-Bauer et al., 2012; Livingston-Rosanoff et al., 2012 |
Non-classical monocytes | Lin− MerTK− Ly6C−/low CD11b+ CX3CR1high | Yes, dissemination of the virus, promotion of latent infection | ? | ? | Daley-Bauer et al., 2014 |
LC | Lin− CD11c+ CD24+ CD11b+ CD207high | No | ? | ? |
In vivo viral infection of DC or monocyte subsets in mice challenged i.p. with MCMV.
The name XCR1+ cDC is not yet an official nomenclature but has been coined here to define in a simple and general way all the CD8α+-type cDC of the mouse.
Studies do not always rigorously discriminate between activated classical monocytes, myeloid-derived suppressor cells (MDSC) and MoDC, which are therefore discussed together here.
?Contribution unknown.