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Enhancement of carcinogen-induced mutations or recombinations by 12-O-tetradecanoyl-phorbol-13-acetate in the mammalian spot test

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  • Experimental Oncology
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Summary

The mammalian spot test is suitable for detecting gene mutations and reciprocal recombinations. When given alone 12-O-tetradecanoyl-phorbol-13-acetate (TPA) did not have any statistically significant effect upon these genetic alterations. In combination with ethylnitrosourea (ENU) however TPA enhanced the effect of the mutagen/carcinogen. The effective dose range of TPA + ENU was very small, i.e., between 2x0.2 and 2x0.33 mg/kg, but the effect was very strong as shown by the steep slope of the dose-effect curve.

The results agree with the hypothesis that the mode of action of cocarcinogens and tumor promoters is a genetic one and that recombination plays an important role in this process.

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Dedicated to Professor Dr. Erich Hecker on the occasion of his 60th birthday.

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Fahrig, R. Enhancement of carcinogen-induced mutations or recombinations by 12-O-tetradecanoyl-phorbol-13-acetate in the mammalian spot test. J Cancer Res Clin Oncol 113, 61–66 (1987). https://doi.org/10.1007/BF00389968

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  • DOI: https://doi.org/10.1007/BF00389968

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