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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 J+Immunol
2016 ; 196
(10
): 4030-9
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Apoptotic Debris Accumulates on Hematopoietic Cells and Promotes Disease in
Murine and Human Systemic Lupus Erythematosus
#MMPMID27059595
Kang S
; Rogers JL
; Monteith AJ
; Jiang C
; Schmitz J
; Clarke SH
; Tarrant TK
; Truong YK
; Diaz M
; Fedoriw Y
; Vilen BJ
J Immunol
2016[May]; 196
(10
): 4030-9
PMID27059595
show ga
Apoptotic debris, autoantibody, and IgG-immune complexes (ICs) have long been
implicated in the inflammation associated with systemic lupus erythematosus
(SLE); however, it remains unclear whether they initiate immune-mediated events
that promote disease. In this study, we show that PBMCs from SLE patients
experiencing active disease, and hematopoietic cells from lupus-prone MRL/lpr and
NZM2410 mice accumulate markedly elevated levels of surface-bound nuclear
self-antigens. On dendritic cells (DCs) and macrophages (MFs), the self-antigens
are part of IgG-ICs that promote Fc?RI-mediated signal transduction. Accumulation
of IgG-ICs is evident on ex vivo myeloid cells from MRL/lpr mice by 10 wk of age
and steadily increases prior to lupus nephritis. IgG and Fc?RI play a critical
role in disease pathology. Passive transfer of pathogenic IgG into IgG-deficient
MRL/lpr mice promotes the accumulation of IgG-ICs prior to significant B cell
expansion, BAFF secretion, and lupus nephritis. In contrast, diminishing the
burden IgG-ICs in MRL/lpr mice through deficiency in Fc?RI markedly improves
these lupus pathologies. Taken together, our findings reveal a previously
unappreciated role for the cell surface accumulation of IgG-ICs in human and
murine lupus.