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2015 ; 158
(2
): 221-30
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Signal transducer and activator of transcription (STAT) 3 inhibition delays the
onset of lupus nephritis in MRL/lpr mice
#MMPMID25869298
Edwards LJ
; Mizui M
; Kyttaris V
Clin Immunol
2015[Jun]; 158
(2
): 221-30
PMID25869298
show ga
The transcription factor STAT3 is overexpressed and hyperactivated in T cells
from SLE patients. STAT3 plays a central role in T cell differentiation into Th17
and T follicular helper cells, two subsets that orchestrate autoimmune responses
in SLE. Moreover, STAT3 is important in chemokine-mediated T cell migration. To
better understand its role in SLE, we inhibited STAT3 in lupus-prone mice using
the small molecule Stattic. Stattic-treated mice exhibited delayed onset of
proteinuria (3 weeks later than controls), and had lower levels of anti-dsDNA
antibodies and inflammatory cytokines. Inhibitor treatment reduced
lymphadenopathy, resulted in a 3-fold decrease in total T cell number, and a
4-fold decrease in the numbers of T follicular helper cells. In vitro experiments
showed that Stattic-treated T cells exhibited decreased proliferation and a
decrease in ability to migrate to CXCL12. We propose that STAT3 inhibition
represents a therapeutic target in SLE, particularly lupus nephritis.