The effect of a tumor promotor, 12-O-tetradecanoyl-phorbol-13-acetate (TPA), on sister-chromatid exchange formation in cultured Chinese hamster cells. |
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Authors: | K S Loveday S A Latt |
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Abstract: | The tumor promoter 12-O-tetradecanoyl-phorbol-13-acetate (TPA) does not increase the sister-chromatid exchange (SCE) frequency in either Chinese hamster ovary (CHO) or lung (V 79) cells which are cultured in the presence of 5-bromodeoxyuridine. Moreover, TPA does not alter the induction of SCEs in CHO cells by mitomycin C during the first 3 cycles following addition of the alkylating agent. These SCE induction data do not by themselves support the hypothesis that tumor promotion by TPA depends on the enhancement of mitotic recombination. |
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