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2017 ; 17
(7
): 421-436
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Altered B cell signalling in autoimmunity
#MMPMID28393923
Rawlings DJ
; Metzler G
; Wray-Dutra M
; Jackson SW
Nat Rev Immunol
2017[Jul]; 17
(7
): 421-436
PMID28393923
show ga
Recent work has provided new insights into how altered B cell-intrinsic signals -
through the B cell receptor (BCR) and key co-receptors - function together to
promote the pathogenesis of autoimmunity. These combined signals affect B cells
at two distinct stages: first, in the selection of the naive repertoire; and
second, during extrafollicular or germinal centre activation responses. Thus,
dysregulated signalling can lead to both an altered naive BCR repertoire and the
generation of autoantibody-producing B cells. Strikingly, high-affinity
autoantibodies predate and predict disease in several autoimmune disorders,
including type 1 diabetes and systemic lupus erythematosus. This Review
summarizes how, rather than being a downstream consequence of autoreactive T cell
activation, dysregulated B cell signalling can function as a primary driver of
many human autoimmune diseases.