Studies on responsiveness of hepatoma cells to catecholamines. V. Loss of adrenergic response of glycogen phosphorylase in rat ascites hepatoma AH130 cells.
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چکیده
منابع مشابه
Altered adrenergic response and specificity of the receptors in rat ascites hepatoma AH130.
Adenylate cyclase activation through adrenergic receptors in rat ascites hepatoma (AH) 130 cells in response to adrenergic drugs was studied, and receptor binding and displacement were compared with those of normal rat hepatocytes. Epinephrine (Epi) and norepinephrine (NE) activated AH130 adenylate cyclase about half as much as isoproterenol (IPN) but equaled IPN after treatment with the alpha-...
متن کاملGlycogen metabolism in Novikoff ascites-hepatoma cells.
A study of the enzymes of the glycogen pathway in Novikoff ascites hepatoma shows that glycogen synthetase has the lowest activity and that the tumour contains no high-K(m) soluble glucokinase. However, incubation of tumour cells with metabolizable sugars in vitro, or intraperitoneal administration of glucose into the tumour-bearing rat, results in glycogen accumulation by the tumour cells. Gly...
متن کاملEnhancement of the cytotoxic effect of mitomycin C by beta-adrenergic stimulants in rat ascites hepatoma AH130 cells.
Among several sympathomimetic drugs, isoproterenol, epinephrine and norepinephrine significantly potentiated the cytotoxic effect and the uptake of MMC into rat ascites hepatoma AH130 cells in in vitro experiments, but salbutamol, tulobuterol and phenylephrine did not. The enhancement of MMC uptake into AH130 cells by isoproterenol and norepinephrine was diminished by propranolol but not by phe...
متن کاملproten tyrosine phosphatase activity in rat ascites hepatoma cells
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 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: 1990
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.38.470