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2015 ; 3
(ä): e1362
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Suberoylanilide hydroxamic acid suppresses hepatic stellate cells activation by
HMGB1 dependent reduction of NF-?B1
#MMPMID26557438
Wang W
; Yan M
; Ji Q
; Lu J
; Ji Y
; Ji J
PeerJ
2015[]; 3
(ä): e1362
PMID26557438
show ga
Hepatic stellate cells (HSCs) activation is essential to the pathogenesis of
liver fibrosis. Exploring drugs targeting HSC activation is a promising
anti-fibrotic strategy. In the present study, we found suberoylanilide hydroxamic
acid (SAHA), a histone deacetylase inhibitor, prominently suppressed the
activation phenotype of a human hepatic stellate cell line-LX2. The production of
collagen type I and ?-smooth muscle actin (?-SMA) as well as the proliferation
and migration of LX2 cells were significantly reduced by SAHA treatment. To
determine the molecular mechanisms underlying this suppression, genome wild gene
regulation by SAHA was determined by Affymetrix 1.0 human cDNA array. Upon SAHA
treatment, the abundance of 331 genes was up-regulated and 173 genes was
down-regulated in LX2 cells. Bioinformatic analyses of these altered genes
highlighted the high mobility group box 1 (HMGB1) pathway was one of the most
relevant pathways that contributed to SAHA induced suppression of HSCs
activation. Further studies demonstrated the increased acetylation of
intracellular HMGB1 in SAHA treated HSCs, and this increasing is most likely to
be responsible for SAHA induced down-regulation of nuclear factor kappa B1
(NF-?B1) and is one of the main underlying mechanisms for the therapeutic effect
of SAHA for liver fibrosis.