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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+Immunol
2016 ; 17
(7
): 825-33
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gab.com Text
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English Wikipedia
A TRAF-like motif of the inducible costimulator ICOS controls development of
germinal center TFH cells via the kinase TBK1
#MMPMID27135603
Pedros C
; Zhang Y
; Hu JK
; Choi YS
; Canonigo-Balancio AJ
; Yates JR 3rd
; Altman A
; Crotty S
; Kong KF
Nat Immunol
2016[Jul]; 17
(7
): 825-33
PMID27135603
show ga
Signaling via the inducible costimulator ICOS fuels the stepwise development of
follicular helper T cells (TFH cells). However, a signaling pathway unique to
ICOS has not been identified. We found here that the kinase TBK1 associated with
ICOS via a conserved motif, IProx, that shares homology with the
tumor-necrosis-factor receptor (TNFR)-associated factors TRAF2 and TRAF3.
Disruption of this motif abolished the association of TBK1 with ICOS, TRAF2 and
TRAF3, which identified a TBK1-binding consensus. Alteration of this motif in
ICOS or depletion of TBK1 in T cells severely impaired the differentiation of
germinal center (GC) TFH cells and the development of GCs, interfered with B cell
differentiation and disrupted the development of antibody responses, but the
IProx motif and TBK1 were dispensable for the early differentiation of TFH cells.
These results reveal a previously unknown ICOS-TBK1 signaling pathway that
specifies the commitment of GC TFH cells.