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ObjectiveTo study the expression levels of YB-1 protein in hepatocellular carcinoma (HCC) tissues,tissues adjacent to tumour and normal liver tissues,and to explore the clinical significance.MethodsTo study the expression levels of YB-1 protein,immunochemistry was carried out on 58 HCC tissues and their corresponding adjacent tissues to tumour and on 20 normal liver tissues.The YB-1 protein with nuclear translocation was detected by Western blot in HCC tissues,tissues adjacent to tumour,normal liver tissues,HCC cell lines including QGY-7701 and SMMC-7721,and a normal hepatic cell line LO2.ResultsPositive signals of YB-1 protein were detected at a high level in HCC tissues (72.4％,42/58) when compared to tissues adjacent to tumour (41.4％,24/58) and to normal liver tissues (35 ％,7/20) (P＞0.05).The nuclear expression of YB-1 (31％,18/58) was significantly correlated with the pathologicalgrade,tumour size and portal venous invasion (P＜0.05).Using Western blot,the YB-1 protein with nuclear translocation was expressed at a higher level in HCC tissues (0.474±0.107) than in tissues adjacent to tumour and in normal liver tissues (P＜0.05).Similar results were obtained in HCC cell lines and the normal hepatic cell line (P＜0.05).ConclusionThe high expression of YB-1 in HCC and its nuclear translocation may be involved in human HCC progression.YB-1 may be a potential target for HCC treatment in the future.
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OBJECTIVE: To investigate the effects of extract of Ginkgo biloba(Egb761) on the expression of matrix metalloproteinase-9(MMP-9) and tissue inhibitor of metalloproteinase-1(TIMP-1) and evaluate its intervention effect on airway remodeling in asthmatic rats model. METHODS: Rats were randomly assigned to normal control, asmatic group, Dexamethasone (DXM) group and Egb761 group. The asmatic model was established in rats. The changes of airway morphologic parameter and the relative content of MMP-9 and TIMP-1 in bronchial epithelium in these groups were determined using immunohistochemical technique and computer assisted image analysis system. RESULTS: The thickness of airway wall and airway smooth muscle was obviously thicker in the asthmatic group than any other group (P