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Objective To investigate the expression of Gadd45beta protein in human hepatocellular carcinoma(HCC) and its clinicopathologic significance.Methods Immunohistochemical method was used to detect the expressions of Gadd45beta in both hepatocellular carcinoma tissues and adjacent non-neoplastic liver tissues form 50 cases.Results The positive rates of Gadd45beta expression in the hepatocellular carcinoma tissues and adjacent non-neoplastic liver tissues were 26.0%(13/50) and 82.0%(41/50) respectively.There were significant difference for the positive rate between the two groups(P0.05).Conclusion Low expression of Gadd45beta protein in hepatocellular carcinoma tissues was exhibited,which may be related to hepatocarcinogenesis as well as biological behaviors and prognosis of HCC.
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Objective To investigate the change of Gadd45?/? in HepG2 cells after UV radiation.Methods HepG2 cells were cultured in vitro followed by radiation with UV (254nm,10 J/m2)and harvested at 1,2,4 h respectively.The induction of Gadd45?/? mRNA by UV was analyzed using RT-PCR,and the induction of Gadd45?/? protein was determined by Western blot assay at the given interval simultaneously.Results The peak values of Gadd45?/? mRNA appeared at 4 h and 1h after induction respectively,while the both of the peak value of Gadd45?/? protein were found at 1h after UV radiation.Conclusion Gadd45?/? could be rapidly induced by UV radiation in HepG2 cells.
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<p><b>OBJECTIVE</b>To investigate the possible roles of MT1M gene on the cell cycle and signaling pathway of Hep-G2.</p><p><b>METHODS</b>Hep-G2 human hepatoma cells made by transfection with expressible MT1M gene, and the cell cycle was detected by flow cytometry, and the signaling pathway was measured by dual luciferase assay in Hep-G2 cells.</p><p><b>RESULTS</b>MT1M gene was able to induce changes of the cell cycle and the activation of NF-kappaB pathway in Hep-G2 cells.</p><p><b>CONCLUSION</b>MT1M gene may affect the cell cycle in Hep-G2 and activate the NF-kappaB-dependent transcription.</p>
Subject(s)
Humans , Cell Line, Tumor , Flow Cytometry , G2 Phase , Physiology , Liver Neoplasms , Pathology , Metallothionein , Genetics , NF-kappa B , Metabolism , Plasmids , Genetics , Signal Transduction , Physiology , TransfectionABSTRACT
To clone and sequence analysis thioredxin redutase cDNA from human leucocyte.Methods:TR cDNA was obtained with RT-PCR and positive cloning was purified and sequenced. Results: of the 1 554 bp, I 494 bp were in an open reading frame encoding mature protein with 498 amino acids. Conclusion:The DNA encoding human leucocyte thioredxin reductase has been determined and the amino acid sequence has been predicted.