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  • Title: Sensitivity of the skin of different mouse strains to the promoting effect of 12-0-tetradecanoyl-phorbol-13-acetate.
    Author: Chouroulinkov I, Lasne C, Phillips D, Grover P.
    Journal: Bull Cancer; 1988; 75(6):557-65. PubMed ID: 3137985.
    Abstract:
    The sensitivity of the skin of Swiss DBA/2 and C57B1/6 mice was compared in two-stage carcinogenicity experiments. Groups of 30 mice were treated once with 7,12-dimethylbenz(a)anthracene (DMBA) (50 micrograms/mouse) which was applied to the shaved dorsal skin as initiator and, starting one week later, 12-0-tetradecanoyl-phorbol-13-acetate (TPA) was applied thrice-weekly at doses of either 0.04, 0.16 or 0.64 micrograms/mouse to the areas of initiated skin. Other groups of mice were similarly treated with TPA (0.64 micrograms) alone. The times at which papillomas and carcinomas first appeared were recorded. Overall the results show, in terms of the numbers of animals with tumours, the total numbers of tumours produced and the numbers of malignant tumours formed all in dose-response relationship, that the Swiss mice were the most sensitive and the B57B1/6 mice the least sensitive to the tumour-promoting effects of TPA with the DBA/2 mice occupying and intermediate position. This relationship also held in the control groups that were treated with TPA alone.
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