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2018 ; 10
(3
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Indoxyl Sulfate Promotes Macrophage IL-1? Production by Activating Aryl
Hydrocarbon Receptor/NF-?/MAPK Cascades, but the NLRP3 inflammasome Was Not
Activated
#MMPMID29543732
Wakamatsu T
; Yamamoto S
; Ito T
; Sato Y
; Matsuo K
; Takahashi Y
; Kaneko Y
; Goto S
; Kazama JJ
; Gejyo F
; Narita I
Toxins (Basel)
2018[Mar]; 10
(3
): ä PMID29543732
show ga
In chronic kidney disease (CKD) patients, accumulation of uremic toxins is
associated with cardiovascular risk and mortality. One of the hallmarks of kidney
disease-related cardiovascular disease is intravascular macrophage inflammation,
but the mechanism of the reaction with these toxins is not completely understood.
Macrophages differentiated from THP-1 cells were exposed to indoxyl sulfate (IS),
a representative uremic toxin, and changes in inflammatory cytokine production
and intracellular signaling molecules including interleukin (IL)-1, aryl
hydrocarbon receptor (AhR), nuclear factor (NF)-?, and mitogen-activated protein
kinase (MAPK) cascades as well as the NLRP3 inflammasome were quantified by
real-time PCR, Western blot analysis, and enzyme-linked immunosorbent assay. IS
induced macrophage pro-IL-1? mRNA expression, although mature IL-1 was only
slightly increased. IS increased AhR and the AhR-related mRNA expression; this
change was suppressed by administration of proteasome inhibitor. IS promoted
phosphorylation of NF-?B p65 and MAPK enzymes; the reaction and IL-1 expression
were inhibited by BAY11-7082, an inhibitor of NF-?B. In contrast, IS decreased
NLRP3 and did not change ASC, pro-caspase 1, or caspase-1 activation. IS-inducing
inflammation in macrophages results from accelerating AhR-NF-?B/MAPK cascades,
but the NLRP3 inflammasome was not activated. These reactions may restrict mature
IL-1? production, which may explain sustained chronic inflammation in CKD
patients.
|Humans
[MESH]
|Indican/*pharmacology
[MESH]
|Interleukin-1beta/genetics/*metabolism
[MESH]
|Macrophages/*drug effects/metabolism
[MESH]
|Mitogen-Activated Protein Kinases/*metabolism
[MESH]