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2008 ; 205
(7
): 1621-34
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gab.com Text
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English Wikipedia
Clearance of influenza virus from the lung depends on migratory langerin+CD11b-
but not plasmacytoid dendritic cells
#MMPMID18591406
GeurtsvanKessel CH
; Willart MA
; van Rijt LS
; Muskens F
; Kool M
; Baas C
; Thielemans K
; Bennett C
; Clausen BE
; Hoogsteden HC
; Osterhaus AD
; Rimmelzwaan GF
; Lambrecht BN
J Exp Med
2008[Jul]; 205
(7
): 1621-34
PMID18591406
show ga
Although dendritic cells (DCs) play an important role in mediating protection
against influenza virus, the precise role of lung DC subsets, such as CD11b- and
CD11b+ conventional DCs or plasmacytoid DCs (pDCs), in different lung
compartments is currently unknown. Early after intranasal infection, tracheal
CD11b-CD11chi DCs migrated to the mediastinal lymph nodes (MLNs), acquiring
co-stimulatory molecules in the process. This emigration from the lung was
followed by an accumulation of CD11b+CD11chi DCs in the trachea and lung
interstitium. In the MLNs, the CD11b+ DCs contained abundant viral nucleoprotein
(NP), but these cells failed to present antigen to CD4 or CD8 T cells, whereas
resident CD11b-CD8+ DCs presented to CD8 cells, and migratory CD11b-CD8- DCs
presented to CD4 and CD8 T cells. When lung CD11chi DCs and macrophages or
langerin+CD11b-CD11chi DCs were depleted using either CD11c-diphtheria toxin
receptor (DTR) or langerin-DTR mice, the development of virus-specific CD8+ T
cells was severely delayed, which correlated with increased clinical severity and
a delayed viral clearance. 120G8+ CD11cint pDCs also accumulated in the lung and
LNs carrying viral NP, but in their absence, there was no effect on viral
clearance or clinical severity. Rather, in pDC-depleted mice, there was a
reduction in antiviral antibody production after lung clearance of the virus.
This suggests that multiple DCs are endowed with different tasks in mediating
protection against influenza virus.