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2017 ; 21
(7
): 1373-1387
Nephropedia Template TP
gab.com Text
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English Wikipedia
Advanced glycation end products regulate anabolic and catabolic activities via
NLRP3-inflammasome activation in human nucleus pulposus cells
#MMPMID28224704
Song Y
; Wang Y
; Zhang Y
; Geng W
; Liu W
; Gao Y
; Li S
; Wang K
; Wu X
; Kang L
; Yang C
J Cell Mol Med
2017[Jul]; 21
(7
): 1373-1387
PMID28224704
show ga
Intervertebral disc degeneration is widely recognized as a cause of lower back
pain, neurological dysfunction and other musculoskeletal disorders. The major
inflammatory cytokine IL-1? is associated with intervertebral disc degeneration;
however, the molecular mechanisms that drive IL-1? production in the
intervertebral disc, especially in nucleus pulposus (NP) cells, are unknown. In
some tissues, advanced glycation end products (AGEs), which accumulate in NP
tissues and promote its degeneration, increase oxidative stress and IL-1?
secretion, resulting in disorders, such as obesity, diabetes mellitus and ageing.
It remains unclear whether AGEs exhibit similar effects in NP cells. In this
study, we observed significant activation of the NLRP3 inflammasome in NP tissues
obtained from patients with degenerative disc disease compared to that with
idiopathic scoliosis according to results detected by Western blot and
immunofluorescence. Using NP cells established from healthy tissues, our in vitro
study revealed that AGEs induced an inflammatory response in NP cells and a
degenerative phenotype in a NLRP3-inflammasome-dependent manner related to the
receptor for AGEs (RAGE)/NF-?B pathway and mitochondrial damage induced by
mitochondrial reactive oxygen species (mtROS) generation, mitochondrial
permeability transition pore (mPTP) activation and calcium mobilization. Among
these signals, both RAGE and mitochondrial damage primed NLRP3 and pro-IL-1?
activation as upstream signals of NF-?B activity, whereas mitochondrial damage
was critical for the assembly of inflammasome components. These results revealed
that accumulation of AGEs in NP tissue may initiate inflammation-related
degeneration of the intervertebral disc via activation of the NLRP3 inflammasome.
|Antigens, Neoplasm/*genetics/metabolism
[MESH]
|Glycation End Products, Advanced/genetics/metabolism
[MESH]