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2014 ; 41
(4
): 555-66
Nephropedia Template TP
gab.com Text
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English Wikipedia
The oncoprotein and transcriptional regulator Bcl-3 governs plasticity and
pathogenicity of autoimmune T cells
#MMPMID25367572
Tang W
; Wang H
; Claudio E
; Tassi I
; Ha HL
; Saret S
; Siebenlist U
Immunity
2014[Oct]; 41
(4
): 555-66
PMID25367572
show ga
Bcl-3 is an atypical member of the I?B family that modulates transcription in the
nucleus via association with p50 (NF-?B1) or p52 (NF-?B2) homodimers. Despite
evidence attesting to the overall physiologic importance of Bcl-3, little is
known about its cell-specific functions or mechanisms. Here we demonstrate a
T-cell-intrinsic function of Bcl-3 in autoimmunity. Bcl-3-deficient T cells
failed to induce disease in T cell transfer-induced colitis and experimental
autoimmune encephalomyelitis. The protection against disease correlated with a
decrease in Th1 cells that produced the cytokines IFN-? and GM-CSF and an
increase in Th17 cells. Although differentiation into Th1 cells was not impaired
in the absence of Bcl-3, differentiated Th1 cells converted to less-pathogenic
Th17-like cells, in part via mechanisms involving expression of the ROR?t
transcription factor. Thus, Bcl-3 constrained Th1 cell plasticity and promoted
pathogenicity by blocking conversion to Th17-like cells, revealing a unique type
of regulation that shapes adaptive immunity.