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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 JCI+Insight
2017 ; 2
(7
): e90111
Nephropedia Template TP
gab.com Text
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Btk-specific inhibition blocks pathogenic plasma cell signatures and myeloid
cell-associated damage in IFN?-driven lupus nephritis
#MMPMID28405610
Katewa A
; Wang Y
; Hackney JA
; Huang T
; Suto E
; Ramamoorthi N
; Austin CD
; Bremer M
; Chen JZ
; Crawford JJ
; Currie KS
; Blomgren P
; DeVoss J
; DiPaolo JA
; Hau J
; Johnson A
; Lesch J
; DeForge LE
; Lin Z
; Liimatta M
; Lubach JW
; McVay S
; Modrusan Z
; Nguyen A
; Poon C
; Wang J
; Liu L
; Lee WP
; Wong H
; Young WB
; Townsend MJ
; Reif K
JCI Insight
2017[Apr]; 2
(7
): e90111
PMID28405610
show ga
Systemic lupus erythematosus (SLE) is often associated with exaggerated B cell
activation promoting plasma cell generation, immune-complex deposition in the
kidney, renal infiltration of myeloid cells, and glomerular nephritis. Type-I
IFNs amplify these autoimmune processes and promote severe disease. Bruton's
tyrosine kinase (Btk) inhibitors are considered novel therapies for SLE. We
describe the characterization of a highly selective reversible Btk inhibitor,
G-744. G-744 is efficacious, and superior to blocking BAFF and Syk, in
ameliorating severe lupus nephritis in both spontaneous and IFN?-accelerated
lupus in NZB/W_F1 mice in therapeutic regimens. Selective Btk inhibition ablated
plasmablast generation, reduced autoantibodies, and - similar to cyclophosphamide
- improved renal pathology in IFN?-accelerated lupus. Employing global
transcriptional profiling of spleen and kidney coupled with cross-species human
modular repertoire analyses, we identify similarities in the inflammatory process
between mice and humans, and we demonstrate that G-744 reduced gene expression
signatures essential for splenic B cell terminal differentiation, particularly
the secretory pathway, as well as renal transcriptional profiles coupled with
myeloid cell-mediated pathology and glomerular plus tubulointerstitial disease in
human glomerulonephritis patients. These findings reveal the mechanism through
which a selective Btk inhibitor blocks murine autoimmune kidney disease,
highlighting pathway activity that may translate to human SLE.