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  • Title: Effect of human serum on alkaline phosphatase induction in cultured human tumor cells.
    Author: Herz F.
    Journal: Experientia; 1989 Aug 15; 45(8):753-5. PubMed ID: 2759209.
    Abstract:
    The continuous cell lines T 24 and HT-29, derived from human bladder and colon carcinomas, produce term-placental and intestinal alkaline phosphatase, respectively. Growth in hyperosmolar medium or exposure to prednisolone or sodium butyrate induces increased enzyme levels, and combinations of inducers elicit synergistic activity increases. The effect of the inducing agents is strikingly diminished when cells are grown in the presence of high concentrations of human serum, and the synergistic increases are essentially abolished. Major human serum protein fractions do not affect alkaline phosphatase induction.
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