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2017 ; 16
(1
): 737-745
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Anti?fibrotic effect of Sedum sarmentosum Bunge extract in kidneys via the
hedgehog signaling pathway
#MMPMID28560403
Bai Y
; Wu C
; Hong W
; Zhang X
; Liu L
; Chen B
Mol Med Rep
2017[Jul]; 16
(1
): 737-745
PMID28560403
show ga
Sedum sarmentosum Bunge (SSBE) is a perennial plant widely distributed in Asian
countries, and its extract is traditionally used for the treatment of certain
inflammatory diseases. Our previous studies demonstrated that SSBE has marked
renal anti?fibrotic effects. However, the underlying molecular mechanisms remain
to be fully elucidated. The present study identified that SSBE exerts its
inhibitory effect on the myofibroblast phenotype and renal fibrosis via the
hedgehog signaling pathway in vivo and in vitro. In rats with unilateral ureteral
obstruction (UUO), SSBE administration reduced kidney injury and alleviated
interstitial fibrosis by decreasing the levels of transforming growth factor
(TGF)??1 and its receptor, and inhibiting excessive accumulation of extracellular
matrix (ECM) components, including type I and III collagens. In addition, SSBE
suppressed the expression of proliferating cell nuclear antigen, and this
anti?proliferative activity was associated with downregulation of hedgehog
signaling activity in SSBE?treated UUO kidneys. In cultured renal tubular
epithelial cells (RTECs), recombinant TGF??1 activated hedgehog signaling, and
resulted in induction of the myofibroblast phenotype. SSBE treatment inhibited
the activation of hedgehog signaling and partially reversed the fibrotic
phenotype in TGF??1?treated RTECs. Similarly, aristolochic acid?mediated
upregulated activity of hedgehog signaling was reduced by SSBE treatment, and
thereby led to the abolishment of excessive ECM accumulation. Therefore, these
findings suggested that SSBE attenuates the myofibroblast phenotype and renal
fibrosis via suppressing the hedgehog signaling pathway, and may facilitate the
development of treatments for kidney fibrosis.