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| 1 | Hepatocyte transformation and tumor development induced by hepatitis C virus NS3 c-terminal deleted protein显示文摘AIM: To study the effect of hepatitis C virus nonstructural protein 3 c-terminal deleted protein (HCV NS3-5') on hepatocyte transformation and tumor development.METHODS: QSG7701 cells were transfected with plasmid pRcHCNS3-5' (expressing HCV NS3 c-terminal deleted protein) by lipofectamine and selected in G418. The expression of HCV NS3 gene and protein was determined by PCR and immunohistochemistry respectively. Biological behavior of transfected cells was observed through cell proliferation assay, anchorage-independent growth and tumor development in nude mice. The expression of HCV NS3 and c-mycproteins in the induced tumor was evaluated by immunohistochemistry.RESULTS: HCV NS3 was strongly expressed in QSG7701 cells transfected with plasmid pRcHCNS3-5' and the positive signal was located in cytoplasm. Cell proliferation assay showed that the population doubling time in pRcHCNS3-5' transfected cells was much shorter than that in pRcCMV and nontransfected cells (24 h, 26 h, 28 h respectively). The cloning ratio of cells transfected with pRcHCNS3-5; pRcCMV and nontransfected cells was 33 %, 1.46 %, 1.11%, respectively,the former one was higher than that in the rest two groups (P<0.01). Tumor development was seen in nude mice inoculated with pRcHCNS3-5' transfected cells after 15 days.HE staining showed its feature of hepatocarcinoma, and immunohistochemistry confirmed the expressions of HCV NS3and c-mycproteins in tumor tissue. The positive control group inoculated with HepG2 also showed tumor development, while no tumor developed in the nude mice injected with pRcCMV and non-transfected cells after 40 days.CONCLUSION: 1.HCV NS3 c-terminal deleted protein has transforming and oncogenic potential. 2. Human liver cell line QSG7701 may be used as a good model to study HCV NS3 pathogenesis. | Qiong-QiongHe Rui-XueCheng YiSun De-YunFeng Zhu-ChuChen HuiZheng | 2003 | World Journal of Gastroenterology2003，9，3： | 10 |
| 2 | Identification of a novel mutation in POU3F4 for prenatal diagnosis in a Chinese family with X-linked nonsyndromic hearing loss显示文摘We present the clinical and genetic findings for a Chinese family with X-linked non-syndromic hearing loss in which the affected males showed congenital profound sensorineural hearing impairment. In two affected brothers, the computer tomography of temporal bone showed bilateral dilation of the internal auditory canal with fistulous communication between the lateral canal and the basal cochlear turn, which is consistent with the typical DFNX2 phenotype. A missense mutation (c.647G→A) in the POU3F4 gene caused a substitu- tion from glycine to glutamic acid at position 216 (p.G216E), and this mutation was found to consistently cosegregate with the deafness phenotype in the family. The mutation resulted in the loss of function of the POU3F4 by decreasing the affinity between the protein and DNA, as shown in silico by the structural analysis. Prenatal diagnosis of pregnant proband of this family revealed the c.647G→A muta- tion in DNA extracted from the amniotic fluid surrounding the fetus. The appropriate use of genetic testing and prenatal diagnosis plays a key role in reducing the recurrence of genetic defects in high-risk families. | Jianzhong Li Jing Cheng Yanping Lu Yu Lu Airing Chen YiSun Dongyang Kang Xin Zhang Pu Dai Dongyi Han Huijun Yuan | 2010 | Journal of Genetics and Genomics2010，37，12： | 9 |
| 3 | Effect of hepatitis C virus nonstructural protein NS3 on proliferation and MAPK phosphorylation of normal hepatocyte line显示文摘AIM: To study the effect of hepatitis C virus nonstructural region 3 (HCV NS3) pro, in on proliferation and transformation of normal human liver cell line.METHODS: QSG7701 cells were transfected with pRcHCNS3-5; pRcHCNS3-3' and pRcCMV using lipofectamine transfecting technique and selected with G418 method. Expression of HCV NS3 protein was determined by immunohistochemistry. Biologic characteristics of transfected cells were evaluated by population doubling time and soft agar assays. Activation of MAPK was analyzed using Western blot with phosphospecific monoclonal antibody against dually phosphorylated MAPK.RESULTS: QSG7701 cells transfected with pRcHCNS3-5' showed strong intracellular expression of HCVNS3 protein,and the positive signal was localized in cytoplasm. The expressing strength of HCVNS3 protein in pRcHCNS3-3'-transfected cells was weaker than that in pRcHCNS3-5'-transfected cells. The population doubling time in the transfected cells with pRcHCNS3-5' (12 h) was much shorter than those with pRcHCNS3-3; pRcCMV and normal cells (24, 26, 28 h, respectively) (P<0.01). The transfected cells with pRcHCNS3-5' showed much more anchorage independent colonies than that in those with pRcHCNS3-3' and pRcCMV (P<0.01). The cloning efficiencies of transfected cells with pRcHCNS3-5', pRcHCNS3-3',pRcCMV and controls were 33%, 1.33%, 1.46%, 1.11% respectively. The level of phosphorylated MlAPK in the cells with pRcHCNS3-5' was much higher than that in those with pRcHCNS3-3'and pRcCMV and normal cells (P<0.01). CONCLUSION: The results suggest that (1) QSG7701 cells are a better human liver cell line for investigating the pathogenesis of HCV NS3 protein. (2) 5' region of the HCV genome segment encoding HCV NS3 is involved in cell growth and cell phenotype. (3) HCV NS3 N-terminalpeptide may up-regulate the activation of rMAPK, but not affect the expression of MAPK. | De-YunFeng YiSun Rui-XueCheng Xiao-MingOuyang HuiZheng | 2005 | World Journal of Gastroenterology2005，11，14： | 8 |
| 4 | Characterization of commercial Cu-SSZ-13 and Cu-SAPO-34 catalysts with hydrothermal treatment for NH 3 -SCR of NO x in diesel exhaust显示文摘 | Lei Ma Yisun Cheng Giovanni Cavataio Robert W. McCabe Lixin Fu Junhua Li | 2013 | Chemical Engineering Journal2013，，： | 1 |
| 5 | Deactivation of Cu/zeolite SCR catalyst due to reductive hydrothermal aging显示文摘 | Huang Yinyan Cheng Yisun Christine Lambert | 2008 | SAE Paper2008，，： | 1 |
| 6 | Activity,stability and hydrocarbon deactivation of Fe/Beta catalyst for SCR of NO with ammonia显示文摘 | HE Chongheng WANG Yuhe CHENG Yisun | 2009 | Applied Catalysis A General2009，368，1： | 1 |
| 7 | Microstructural morphology of the semi-solid high carbon steel T12 before and after rheo-rolling显示文摘The semi-solid high carbon steel T12 was rolled in a closed box groove under a certain condition by the rheo-rolling equipment, and the microstructural morphology of the semi-solid T12 before and after deformation was investigated by optical mi- croscope to analyze and summarize the microstructure evolution law of T12 deformed in semi-solid state. The experiment results show that the grain shape before deformation of the semi-solid T12 steel displays globule or ellipse by the electromagnetic stirring, the distribution of solid and liquid phases is homogeneous. But the microstructure of semi-solid product after rheo-rolling exhibits macrosegregation that the distribution of liquid and solid phases changes, the liquid phases divorce from the solid phases. In the transverse section, most of the solid phases get together in the center of the specimen, the liquid phases flow to the surface or the edge of the specimen, and the grains occur plastic deformation while reduction increased. In longitudinal section, the middle micro- structure of the specimen is more homogeneous than that at the head or tail, the head microstructure is similar to the tail and the size of the grains is not homogeneous. | JiguangLi YonglinKang AiminZhao YiSun ManCheng | 2005 | Journal of University of Science and Technology Beijing2005，12，2： | 1 |
| 8 | In situ DRIFTS and temperature-programmed technology study on NH3-SCR of NOx over Cu-SSZ-13 and Cu-SAPO-34 catalysts 显示文摘 | Ma Lei Cheng Yisun Cavataio G McCabe R W Fu Lixin Li Junhua | 2014 | Applied Catalysis B: Environmental2014，，： | 1 |
| 9 | Growth inhibition of nasopharyngeal carcinoma cells by EGF receptor tyrosine kinase inhibitors 显示文摘 | David WF Patrick V | 1999 | Anticancer Research1999，19，： | 1 |
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