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Effect of calf and rat serum on the induction of DNA synthesis and mitosis in primary cultures of adult rat hepatocytes by cyproterone acetate and epidermal growth factor

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Induction of hepatocyte DNA synthesis in culture by cyproterone acetate (CPA), a potent hepatomitogen in vivo, was studied. Adult rat hepatocytes were grown on collagen gels in primary culture for 3 to 10 d. Epidermal growth factor (EGF) was used as a model inducer to establish appropriate culture conditions. (a) In serum-free medium EGF stimulated a wave of DNA synthesis in 10 to 30% of the hepatocytes. CPA had only a weak effect. (b) Increasing concentrations of newborn bovine serum (NBS) at 5 to 95% progressively inhibited the stimulatory effect of EGF. A similar inhibition was obtained by adding bovine serum albumin; 20% NBS, however, had a slightly stimulatory effect on the induction of DNA synthesis by CPA. (c) Portal rat serum (RS) at concentration of 5 to 95% markedly stimulated DNA synthesis, a plateau being reached between 20 and 95%. EGF had a distinct enhancing effect on DNA synthesis in the presence of 5 and 20% RS but not at 50 and 95%. CPA stimulated DNA synthesis in the presence of 20, 50, and 95% RS in a synergistic way. (d) Mitoses were found after treatment with EGF or with CPA. These results show that CPA can induce DNA synthesis in cultured hepatocytes and that RS contains factors facilitating the response to CPA.

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Authors and Affiliations

  1. Institut für Tumorbiologie-Krebsforschung, Borschkegasse 8a, A-1090, Wien, Austria

    W. Parzefall, P. R. Galle & R. Schulte-Hermann

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  1. W. Parzefall
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  2. P. R. Galle
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  3. R. Schulte-Hermann
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This study was supported by Gesellschaft für Strahlen-und Umweltforschung mbH, München, Germany.

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Parzefall, W., Galle, P.R. & Schulte-Hermann, R. Effect of calf and rat serum on the induction of DNA synthesis and mitosis in primary cultures of adult rat hepatocytes by cyproterone acetate and epidermal growth factor. In Vitro Cell Dev Biol 21, 665–673 (1985). https://doi.org/10.1007/BF02620920

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  • DOI: https://doi.org/10.1007/BF02620920

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