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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+Am+Soc+Nephrol
2017 ; 28
(7
): 2022-2037
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IL-36 Signaling Facilitates Activation of the NLRP3 Inflammasome and IL-23/IL-17
Axis in Renal Inflammation and Fibrosis
#MMPMID28179433
Chi HH
; Hua KF
; Lin YC
; Chu CL
; Hsieh CY
; Hsu YJ
; Ka SM
; Tsai YL
; Liu FC
; Chen A
J Am Soc Nephrol
2017[Jul]; 28
(7
): 2022-2037
PMID28179433
show ga
IL-36 cytokines are proinflammatory and have an important role in innate and
adaptive immunity, but the role of IL-36 signaling in renal tubulointerstitial
lesions (TILs), a major prognostic feature of renal inflammation and fibrosis,
remains undetermined. In this study, increased IL-36? expression detected in
renal biopsy specimens and urine samples from patients with renal TILs correlated
with renal function impairment. We confirmed the increased expression of IL-36?
in the renal tubular epithelial cells of a mouse model of unilateral ureteral
obstruction (UUO) and related cell models using mechanically induced pressure,
oxidative stress, or high mobility group box 1. In contrast, the kidneys of IL-36
receptor (IL-36R) knockout mice exhibit attenuated TILs after UUO. Compared with
UUO-treated wild-type mice, UUO-treated IL-36 knockout mice exhibited markedly
reduced NLRP3 inflammasome activation and macrophage/T cell infiltration in the
kidney and T cell activation in the renal draining lymph nodes. In vitro,
recombinant IL-36? facilitated NLRP3 inflammasome activation in renal tubular
epithelial cells, macrophages, and dendritic cells and enhanced dendritic
cell-induced T cell proliferation and Th17 differentiation. Furthermore,
deficiency of IL-23, which was diminished in IL-36R knockout UUO mice, also
reduced renal TIL formation in UUO mice. In wild-type mice, administration of an
IL-36R antagonist after UUO reproduced the results obtained in UUO-treated IL-36R
knockout mice. We propose that IL-36 signaling contributes to the pathogenesis of
renal TILs through the activation of the NLRP3 inflammasome and IL-23/IL-17 axis.