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Inhibitory effects of armepavine against hepatic fibrosis in rats.

Abstract：

:Activation of hepatic stellate cells (HSCs) plays a crucial role in liver fibrogenesis. armepavine (Arm, C19H23O3N), an active compound from Nelumbo nucifera, has been shown to exert immunosuppressive effects on T lymphocytes and on lupus nephritic mice. The aim of this study was to investigate whether Arm could exert anti-hepatic fibrogenic effects in vitro and in vivo. A cell line of rat HSCs (HSC-T6) was stimulated with tumor necrosis factor-alpha (TNF-alpha) or lipopolysaccharide (LPS) to evaluate the inhibitory effects of Arm. An in vivo therapeutic study was conducted in bile duct-ligated (BDL) rats. BDL rats were given Arm (3 or 10 mg/kg) by gavage twice daily for 3 weeks starting from the onset of BDL. Liver sections were taken for fibrosis scoring, immuno-fluorescence staining and quantitative real-time mRNA measurements. In vitro, Arm (1-10 microM) concentration-dependently attenuated TNF-alpha- and LPS-stimulated alpha-SMA protein expression and AP-1 activation by HSC-T6 cells without adverse cytotoxicity. Arm also suppressed TNF-alpha-induced collagen collagen deposition, NFkappaB activation and MAPK (p38, ERK1/2, and JNK) phosphorylations. In vivo, Arm treatment significantly reduced plasma AST and ALT levels, hepatic alpha-SMA expression and collagen contents, and fibrosis scores of BDL rats as compared with vehicle treatment. Moreover, Arm attenuated the mRNA expression levels of col 1alpha2, TGF-beta1, TIMP-1, ICAM-1, iNOS, and IL-6 genes, but up-regulated metallothionein genes. Our study results showed that Arm exerted both in vitro and in vivo antifibrotic effects in rats, possibly through anti-NF-kappaB activation pathways.

journal_name

J Biomed Sci

journal_title

Journal of biomedical science

authors

Weng TC,Shen CC,Chiu YT,Lin YL,Kuo CD,Huang YT

doi

10.1186/1423-0127-16-78

subject

Has Abstract

pub_date

2009-09-02 00:00:00

pages

78

eissn

1021-7770

issn

1423-0127

pii

1423-0127-16-78

journal_volume

16

pub_type

杂志文章

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