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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
2017 ; 198
(7
): 2602-2611
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BAFF Induces Tertiary Lymphoid Structures and Positions T Cells within the
Glomeruli during Lupus Nephritis
#MMPMID28235864
Kang S
; Fedoriw Y
; Brenneman EK
; Truong YK
; Kikly K
; Vilen BJ
J Immunol
2017[Apr]; 198
(7
): 2602-2611
PMID28235864
show ga
Tissue-specific immune responses play an important role in the pathology of
autoimmune diseases. In systemic lupus erythematosus, deposits of IgG-immune
complexes and the activation of complement in the kidney have long been thought
to promote inflammation and lupus nephritis. However, the events that localize
cells in non-lymphoid tertiary organs and sustain tissue-specific immune
responses remain undefined. In this manuscript, we show that BAFF promotes events
leading to lupus nephritis. Using an inducible model of systemic lupus
erythematosus, we found that passive transfer of antinucleosome IgG into
AID(-/-)MRL/lpr mice elevated autoantibody levels and promoted lupus nephritis by
inducing BAFF production in the kidneys, and the formation of renal tertiary
lymphoid structures (TLSs). Reducing BAFF in vivo prevented the formation of TLSs
and lupus nephritis; however, it did not reduce immune cell infiltrates, or the
deposits of IgG and complement in the kidney. Mechanistically, lowering BAFF
levels also diminished the number of T cells positioned inside the glomeruli and
reduced inflammation. Thus, BAFF plays a previously unappreciated role in lupus
nephritis by inducing renal TLSs and regulating the position of T cells within
the glomeruli.