Efeito do Ácido Gálico sobre a fibrogênese hepática murina / Effect of Gallic Acid in murine hepatic fibrogenesis

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

13/04/2012

RESUMO

The fibrogenic processes activate by mechanisms such as oxidative stress can lead to a picture of liver cirrhosis, which represents a major cause of death in West. However, in some studies, phenolic substances, such as Gallic Acid (GA) shown to inhibit and even regress theses processes. The aim of this study was to investigate the effects of the phenolic compound GA in murine liver fibrogenic process. They were evaluated both in progression of fibrosis and in liver cirrhosis established by administration carbon tetrachloride im mice C57. For this, was performed histological, immunohistochemical, PCR and Western blotting analysis, estimating factors related to fibrogenesis and inflammatory mediators associated. There was a significant decrease of area stained by Sirius Red, which means reduction in the percentage of fibrosis in the groups treated with GA. Both for prevention (p<0,05) and for the regression of the cirrhosis (p<0,05). This improvement was accompanied by a reduction in the number of cells marked by SMA in the treated groups (p<0,05). These parameters was confirmed by genomic analysis for collagen, as well as by TIMP 1 and TGF 1, and proteomics for p38 MPK and NFkB. The findings of this study demonstrade the effect of GA in the prevention and of liver fibrogenic process. The main mechanisms of this process involves anti-inflammatory activity via TGF 1 and p38 MAPK, especially during induction of fibrosis, as well as restriction of antiapoptotic capacity of NFkB on the CEH in established cirrhosis.

ASSUNTO(S)

Ácido gálico antioxidantes antioxidants cirrose hepática compostos fenólicos gallic acid liver cirrhosis phenolic compounds

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