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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2017 ; 8
(ä): 14830
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Src family kinases Fyn and Lyn are constitutively activated and mediate
plasmacytoid dendritic cell responses
#MMPMID28368000
Dallari S
; Macal M
; Loureiro ME
; Jo Y
; Swanson L
; Hesser C
; Ghosh P
; Zuniga EI
Nat Commun
2017[Apr]; 8
(ä): 14830
PMID28368000
show ga
Plasmacytoid dendritic cells (pDC) are type I interferon-producing cells with
critical functions in a number of human illnesses; however, their molecular
regulation is incompletely understood. Here we show the role of Src family
kinases (SFK) in mouse and human pDCs. pDCs express Fyn and Lyn and their
activating residues are phosphorylated both before and after Toll-like receptor
(TLR) stimulation. Fyn or Lyn genetic ablation as well as treatment with SFK
inhibitors ablate pDC (but not conventional DC) responses both in vitro and in
vivo. Inhibition of SFK activity not only alters TLR-ligand localization and
inhibits downstream signalling events, but, independent of ex-vivo TLR
stimulation, also affects constitutive phosphorylation of BCAP, an adaptor
protein bridging PI3K and TLR pathways. Our data identify Fyn and Lyn as
important factors that promote pDC responses, describe the mechanisms involved
and highlight a tonic SFK-mediated signalling that precedes pathogen encounter,
raising the possibility that small molecules targeting SFKs could modulate pDC
responses in human diseases.