ABSTRACT
Objective To investigate the expression and significance of Smad4 in peripheral hepatocytes of lesions in mice with hepatic alveolar echinococcosis.Methods Eight mice in the test group were inoculated with alveolar echinococcosis and 8 mice in the control group were injected with normal saline.The expression of Smad4 protein in the hepatic tissue of the mice was detected by immunohistochemistry method,and the data were analyzed by chi-square test.The effect of alveolar echinocoeeosis on the expression of Smad4 protein was investigated.Results Smad4 was detected in cell nuclei and partly in the cytoplasm.Six months after the establishment of the mice model for alveolar echinococeosis,the expression of Smad4 in the hepatic tissue in the test group was significantly higher than in the control group(x2=19.869,P＜0.05).The number of Smad4 with positive expression in the hepatocytes in the test group was slightly higher than in the control group,and the expression intensity of Smad4 in the test group was greater than in the control group(x2=58.3 10,P＜0.05).Conclusions The increase of the expression of Smad4 protein in the periphery hepatocytes and tissues of hepatic alveolar echinococcosis lesions may play a role in hepatic cirrhosis and immune evasion.
ABSTRACT
AIM:To investigate the effect and mechanism of liver ischemia/reperfusion(I/R)injury on the changes of cardiac energy metabolism and structure.METHODS:48 healthy Wistar male rats were randomly divided into 6 groups as follows(n=8 in each group):control group(CTL),simply ischemia for 30 min without reperfusion(I group);reperfusion following ischemia for 30 min(I/R group);2 h reperfusion following ischemia for 30 min(I/R 2 h group);4 h reperfusion following ischemia for 30 min(I/R 4 h group)and 6 h reperfusion following ischemia for 30 min(I/R 6 h group).The level of serum endotoxin was measured.The levels of insulin and insulin antibody in heart were detected by radioimmunoassay.The contents of MDA,MPO and lactic acid in heart were also determined.RESULTS:During the process of liver I/R injury,the level of endotoxin increased in I group and I/R group and declined gradually for long time during reperfusion,but was still longer than that in CTL group(P0.05).CONCLUSION:During the process of liver I/R injury,endotoxin is absorbed from intestine and impairment of liver detoxication leads to endotoxemia,which might play a role in the changes of the energy metabolism and structure in heart.