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2015 ; 17
(ä): 331
Nephropedia Template TP
gab.com Text
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Citral alleviates an accelerated and severe lupus nephritis model by inhibiting
the activation signal of NLRP3 inflammasome and enhancing Nrf2 activation
#MMPMID26584539
Ka SM
; Lin JC
; Lin TJ
; Liu FC
; Chao LK
; Ho CL
; Yeh LT
; Sytwu HK
; Hua KF
; Chen A
Arthritis Res Ther
2015[Nov]; 17
(ä): 331
PMID26584539
show ga
INTRODUCTION: Lupus nephritis (LN) is a major complication of systemic lupus
erythematosus. NLRP3 inflammasome activation, reactive oxygen species (ROS) and
mononuclear leukocyte infiltration in the kidney have been shown to provoke the
acceleration and deterioration of LN, such as accelerated and severe LN (ASLN).
Development of a novel therapeutic remedy based on these molecular events to
prevent the progression of the disease is clinically warranted. METHODS: Citral
(3,7-dimethyl-2,6-octadienal), a major active compound in a Chinese herbal
medicine Litsea cubeba, was used to test its renoprotective effects in a
lipopolysaccharide (LPS)-induced mouse ASLN model by examining NLRP3 inflammasome
activation, ROS and COX-2 production as well as Nrf2 activation. The analysis of
mechanisms of action of Citral also involved its effects on IL-1? secretion and
signaling pathways of NLRP3 inflammasome in LPS-primed peritoneal macrophages or
J774A macrophages. RESULTS: Attenuated proteinuria, renal function impairment,
and renal histopathology, the latter including intrinsic cell proliferation,
cellular crescents, neutrophil influx, fibrinoid necrosis in the glomerulus, and
peri-glomerular infiltration of mononuclear leukocytes as well as
glomerulonephritis activity score were observed in Citral-treated ASLN mice. In
addition, Citral inhibited NLRP3 inflammasome activation and levels of ROS,
NAD(P)H oxidase subunit p47(phox), or COX-2, and it enhanced the activation of
nuclear factor E2-related factor 2 (Nrf2). In LPS-primed macrophages, Citral
reduced ATP-induced IL-1? secretion and caspase-1 activation, but did not affect
LPS-induced NLRP3 protein expression. CONCLUSION: Our data show that Citral
alleviates the mouse ASLN model by inhibition of the activation signal, but not
the priming signal, of NLRP3 inflammasome and enhanced activation of Nrf2
antioxidant signaling.