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2017 ; 7
(1
): 11006
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gab.com Text
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English Wikipedia
Glycosylation-dependent galectin-1/neuropilin-1 interactions promote liver
fibrosis through activation of TGF-?- and PDGF-like signals in hepatic stellate
cells
#MMPMID28887481
Wu MH
; Chen YL
; Lee KH
; Chang CC
; Cheng TM
; Wu SY
; Tu CC
; Tsui WL
Sci Rep
2017[Sep]; 7
(1
): 11006
PMID28887481
show ga
Concomitant expressions of glycan-binding proteins and their bound glycans
regulate many pathophysiologic processes, but this issue has not been addressed
in liver fibrosis. Activation of hepatic stellate cells (HSCs) is a rate-limiting
step in liver fibrosis and is an important target for liver fibrosis therapy. We
previously reported that galectin (Gal)-1, a ?-galactoside-binding protein,
regulates myofibroblast homeostasis in oral carcinoma and wound healing, but the
role of Gal-1 in HSC migration and activation is unclear. Herein, we report that
Gal-1 and its bound glycans were highly expressed in fibrotic livers and
activated HSCs. The cell-surface glycome of activated HSCs facilitated Gal-1
binding, which upon recognition of the N-glycans on neuropilin (NRP)-1, activated
platelet-derived growth factor (PDGF)- and transforming growth factor
(TGF)-?-like signals to promote HSC migration and activation. In addition,
blocking endogenous Gal-1 expression suppressed PDGF- and TGF-?1-induced
signaling, migration, and gene expression in HSCs. Methionine and
choline-deficient diet (MCD)-induced collagen deposition and HSC activation were
attenuated in Gal-1-null mice compared to wild-type mice. In summary, we
concluded that glycosylation-dependent Gal-1/NRP-1 interactions activate TGF-?
and PDGF-like signaling to promote the migration and activation of HSCs.
Therefore, targeting Gal-1/NRP-1 interactions could be developed into liver
fibrosis therapy.