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2016 ; 6
(ä): 23968
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Quercetin Inhibits Fibroblast Activation and Kidney Fibrosis Involving the
Suppression of Mammalian Target of Rapamycin and ?-catenin Signaling
#MMPMID27052477
Ren J
; Li J
; Liu X
; Feng Y
; Gui Y
; Yang J
; He W
; Dai C
Sci Rep
2016[Apr]; 6
(ä): 23968
PMID27052477
show ga
Quercetin, a flavonoid found in a wide variety of plants and presented in human
diet, displays promising potential in preventing kidney fibroblast activation.
However, whether quercetin can ameliorate kidney fibrosis in mice with
obstructive nephropathy and the underlying mechanisms remain to be further
elucidated. In this study, we found that administration of quercetin could
largely ameliorate kidney interstitial fibrosis and macrophage accumulation in
the kidneys with obstructive nephropathy. MTORC1, mTORC2, ?-catenin as well as
Smad signaling were activated in the obstructive kidneys, whereas quercetin could
markedly reduce their abundance except Smad3 phosphorylation. In cultured NRK-49F
cells, quercetin could inhibit ?-SMA and fibronectin (FN) expression induced by
TGF?1 treatment. MTORC1, mTORC2, ?-catenin and Smad signaling pathways were
stimulated by TGF?1 at a time dependent manner. Similar to those findings in the
obstructive kidneys, mTORC1, mTORC2 and ?-catenin, but not Smad signaling
pathways were remarkably blocked by quercetin treatment. Together, these results
suggest that quercetin inhibits fibroblast activation and kidney fibrosis
involving a combined inhibition of mTOR and ?-catenin signaling transduction,
which may act as a therapeutic candidate for patients with chronic kidney
diseases.