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2018 ; 2018
(ä): 7808656
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Andrographolide Ameliorates Liver Fibrosis in Mice: Involvement of TLR4/NF-?B and
TGF-?1/Smad2 Signaling Pathways
#MMPMID29743985
Lin L
; Li R
; Cai M
; Huang J
; Huang W
; Guo Y
; Yang L
; Yang G
; Lan T
; Zhu K
Oxid Med Cell Longev
2018[]; 2018
(ä): 7808656
PMID29743985
show ga
Liver fibrosis is characterized by activated hepatic stellate cells (HSC) and
extracellular matrix accumulation. Blocking the activation of HSC and the
inflammation response are two major effective therapeutic strategies for liver
fibrosis. In addition to the long history of using andrographolide (Andro) for
inflammatory disorders, we aimed at elucidating the pharmacological effects and
potential mechanism of Andro on liver fibrosis. In this study, liver fibrosis was
induced by carbon tetrachloride (CCl(4)) and the mice were intraperitoneally
injected with Andro for 6 weeks. HSC cell line (LX-2) and primary HSC were also
treated with Andro in vitro. Treatment of CCl(4)-induced mice with Andro
decreased the levels of alanine aminotransferase (ALT) and aspartate
aminotransferase (AST), Sirius red staining as well as the expression of ? smooth
muscle actin (?-SMA) and transforming growth factor- (TGF-) ?1. Furthermore, the
expression of Toll-like receptor (TLR)4 and NF-?B p50 was also inhibited by
Andro. Additionally, in vitro data confirmed that Andro treatment not only
attenuated the expression of profibrotic and proinflammatory factors but also
blocked the TGF-?1/Smad2 and TLR4/NF-?B p50 pathways. These results demonstrate
that Andro prevents liver inflammation and fibrosis, which is in correlation with
the inhibition of the TGF-?1/Smad2 and TLR4/NF-?B p50 pathways, highlighting
Andro as a potential therapeutic strategy for liver fibrosis.