Inhibitory effects of prostaglandin E₁ on activation of hepatic stellate cells in rabbits with schistosomiasis  

出　　处：《Hepatobiliary & Pancreatic Diseases International》2007年第2期176-181,共6页国际肝胆胰疾病杂志（英文版）

基　　金：This study was supported by a grant from the National Natural Science Foundation of China(No.30170920).

摘　　要：BACKGROUND: Liver fibrosis is the result of an imbalance between synthesis and degradation of extracellular matrix proteins of the liver. At the cellular and molecular levels, this progressive process is mainly characterized by activation of hepatic stellate cells (HSCs). Schistosoma japonica is one of the most prevalent causes of liver fibrosis in China. It is characterized by hepatocyte damage, inflammation, and chronic parasite egg-induced granuloma formation leading to fibrosis. This study aimed to investigate the inhibitory effects of prostaglandin E1 (PGE1) on activation of HSCs and the alteration of type Ⅰ and Ⅲ collagen in rabbits with schistosomiasis. The study may promote the clinical application of praziquantel and PGE1 as a combined therapy to reverse hepatic fibrosis caused by schistosomiasis. METHODS: Rabbits were percutaneously infected with cercaria of S. japonicum. Seven rabbits were subjected to intravenous injections of PGE1 (2.5 μg/kg daily) from days 60 to 120 after infection. The ultrastructural changes in activated HSCs were observed under transmission electron microscopy. The expression of α-smooth muscle actin (α-SMA) was detected by immunohistochemistry. Fibril-forming collagens were detected by picrosirius staining. RESULTS: Activation of HSCs was a characteristic alteration in schistosome-induced hepatic fibrosis. The expression of contraction-related α-SMA and thecontent of collagens were increased. Exogenous PGE1 markedly inhibited the activation of HSCs and reduced the expression of α-SMA around the hepatic sinusoids (P【0.01). The contents of type Ⅰ and Ⅲ collagens were significantly attenuated. The ratio of staining area to the whole field (10×3.3) under a polarized light microscope in the untreated and treated groups was 37.25±9.71 vs. 13.38±4.24 (P【0.01) and 9.66±3.52 vs. 6.23±1.81 (P【0.05), respectively. CONCLUSIONS: Activation of HSCs may play a key role in the progress of schistosome-induced hepatic fibrosis. PGE1 effectively protects rabbit liver fr

关 键 词：HEPATIC fibrosis SCHISTOSOME HEPATIC stellate cells PROSTAGLANDIN E1 fibril-forming collagen 

分 类 号：R575.2[医药卫生—消化系统] R532.21[医药卫生—内科学]