Objective To explore the role of connective tissue growth factor(CTGF)in the mechanism of liver fibrosis.Methods Liver fibrosis models of rats were made by subcutaneously injecting with CCl4.On the other hand,32 human liver cirrhosis and 12 normal liver tissues were collected too.Immunohistochemical staining was used to detect the expression of CTGF in these tissues.Results The expression of CTGF in rats after injection with CCl4 was found mainly in hepatic stellate cells(HSC) and hepatocytes are all significantly higher than those in normal rats.Moreover,it presents with progressive tendency for the expression of CTGF in rats respectively at 1st,4th and 8th week after injection of CCl4.The same tendency was found in human normal and fibrotic liver tissues(P

Objective To explore the role of Extracellular signal-regulated kinase(ERK)signal transduction pathway in the mechanism of liver fibrosis via investigating the expression of ERK1 in fibrotic liver tissue of human.Methods SABC immunohistochemistry was used to detect the expression of ERK1 in 32 liver fibrosis and 12 normal liver tissues from Jan.2001 to Dec.2003.Results The expression of ERK1 in liver fibrotic tissues were found chiefly in hepatic stellate cells(HSC),and it presented with significantly progressive tendency for the expression of ERK1 in normal and liver fibrosis cirrhosis tissues(P

Objective To evaluatethe expression and significance of RUNX3 gene and protein in hepatocellular carcinoma.Method Reverse transcription-polymerase chain resction (RT-PCR) and immunoitistochemistry SP method were used to detect the expressions of RUNX3 gene and protein in 23 cases of hepatocellular carcinoma and their adjacent non-cancerous tissue.Results The expression of RUNX3 gene and protein were significantly reduced in hepatocellular carcinoma tissue (26.1% and 17.4% respectively),which were prominently lower than those in adjacent non-cancerous tissue:91.3% (21/23) and 87.0% (20/23),P＜0.01.Conclusion The lower-expression of RUNX3 gene and protein may play an important role in hepatocellular carcinoma.

Objective:To study the serological reactions in cynomolgus monkeys infected with hepatitis B virus ( HBV). Methods:To select 1 to 3 days old or adult healthy cynomolgus monkeys by artificial breeding to observe the virology screening in laboratory a month to confirmed healthy animals ,randomly divided into control group and infection group .Infection group vaccination serum HBV carriers 0.5 ml (HBV-DNA≥108 copies) single cages,observe each group behavioral changes daily after inoculation 1 to 12 weeks, each week to confirmed the degree of liver inflammation through the HBV-M, HBV-DNA, liver function and on the B-guided, liver tissue inflammation by routine HE staining .Results: Adult monkeys did not induce positive reaction after vaccination , there were three young monkeys appear HBsAg , HBcAb and 2 appear HBV-DNA reaction, ALT poison attack occurred in HBsAg-positive began to increase after one week , one month after the peak , which was 180 U/L, after gradually decreased , continuing a month later near normal .AST higher than a week after the normal reference values were flat curve , representing the peak ALT after a month later, HBsAg positive cynomolgus monkeys HE staining showed mild hepatitis partial liver tissue lesions .Conclusion:HBV-M, HBV-DNA, ALT, AST and liver histopathology after HBV infection have changed , this result showing that it's produce inflammation and induction the response of immune .