Sensitivity to Antitumor Drugs and Vinblastine Binding to Membrane in Rat Ascites Hepatoma AH66 Cells.
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Insulin receptors in Zajdela rat ascites hepatoma cells and their sensitivity to certain enzymes and lectins.
The insulin receptors in two strains of Zajdela ascites hepatoma cells have been studied. Specific binding of insulin was investigated at 4,15, and 22°,and the amount of insulin bound at steady state was proportional to the cell concentration. The optimum pH was 7.6. Scatchard analysis of the insulin binding exhibited cur vilinear plots. The number of insulin receptors was mark edly reduced in...
متن کاملBinding of bleomycin to DNA in bleomycin-sensitive and -resistant rat ascites hepatoma cells.
The 14C activity of [14C]bleomycin bound to DNA in bleomycin-sensitive rat ascites hepatoma cells (AH-66) was 8.7 times higher than in resistant cells (AH-66F) when the cells were incubated with [14C]bleomycin. The difference in permeability to bleomycin was not significant; uptake of [14C]bleomycin by the sensitive cells was only 1.2 times larger than that by the resistant cells, and the radio...
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protein tyrosine phosphatases (ptpases) regulate tyrosine phosphorylation of target proteins involved in several aspects of cellular functions. enzyme activities of the ptpases in cytosolic and particulate fractions of rat ascites hepatoma cell lines were determined and compared with those of normal rat liver. our present data revealed that although there was no neoplatic-specific alteration of...
متن کاملIncreased histone acetylation and deacetylation in rat ascites hepatoma cells.
Rates of histone acetylation and deacetylation in nuclei from fetal, adult, and two kinds of neoplastic rat hepatocytes were examined. Histone acetylation in isolated nuclei was measured in the presence of 6 mM sodium n-butyrate, a potent inhibitor of deacetylase, and in the absence of the inhibitor. The deacetylase activity was estimated from the difference between the rates with or without th...
متن کاملExpression of CXC Chemokines Gro/KC and SDF-1a in Rat H4 Hepatoma Cells in Response to Different Stimuli
Background: It is now well established that several environmental stress factors cause activation of p38 MAP kinase and JNK in various cell types to produce chemokines. Objective: To investigate the expression of CXC chemokines Gro/KC and SDF- 1a in rat's H4 hepatoma cells in response to heat shock, hyperosmolarity and oxidative stress. Methods: Hepatoma cells were maintained in MEM medium. Cel...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1992
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.40.2182