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2017 ; 2017
(ä): 2670658
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miR-200c Accelerates Hepatic Stellate Cell-Induced Liver Fibrosis via Targeting
the FOG2/PI3K Pathway
#MMPMID28691020
Ma T
; Cai X
; Wang Z
; Huang L
; Wang C
; Jiang S
; Hua Y
; Liu Q
Biomed Res Int
2017[]; 2017
(ä): 2670658
PMID28691020
show ga
BACKGROUND: Although expression of miR-200s is aberrant in liver fibrosis, its
role in liver fibrogenesis still remains unknown. Here, we investigated the role
of miR-200c in the activation of human hepatic stellate cells (HSCs) and
induction of liver fibrosis. METHODS: We engineered human HSCs (LX2 cell line) to
stably express miR-200c (LX2-200c) or empty vector control (LX2-nc). RESULTS:
miR-200c expression upregulated ?-smooth muscle actin (SMA) and vimentin,
enhanced HSCs growth and migration, increased expression of collagen type I (a
main component of ECM) gene and secretion of epidermal growth factor (EGF), and
upregulated the phosphorylation of Akt, a downstream effector of the PI3K
pathway. As a target of miR-200s and inhibitor of PI3K pathway, FOG2 protein
expression was significantly suppressed in LX2-200c cells. Moreover, LY294002, a
highly selective inhibitor of PI3K, blocked phosphorylation of Akt and the
effects of miR-200c. CONCLUSIONS: These data suggest that miR-200c activates HSCs
in liver fibrosis possibly by downregulating FOG2 protein expression and
upregulating PI3K/Akt signaling. Autocrine activation of EGF signaling may also
be a mechanism of miR-200c-mediated HSCs activation. So miR-200c can be a
potential marker for HSCs activation and liver fibrosis progression, as well as a
potential target to attenuate liver fibrosis.