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  • Title: Failure of dietary lyophilized strawberries to inhibit 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone-and benzo[a]pyrene-induced lung tumorigenesis in strain A/J mice.
    Author: Carlton PS, Kresty LA, Stoner GD.
    Journal: Cancer Lett; 2000 Oct 31; 159(2):113-7. PubMed ID: 10996721.
    Abstract:
    In the present study, we examined the ability of lyophilized strawberries in the diet to inhibit 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK)- and benzo[a]pyrene (B[a]P)-induced lung tumorigenesis in the A/J mouse. Groups of 20 mice were administered purified AIN-76A diet containing 10% lyophilized strawberries 1 week before carcinogen dosing, and for the duration of the study. NNK was administered by i.p. injection in five, 0.414 mg doses. B[a]P was administered by gavage in five, 0.2 mg doses. At 20 weeks, there were no significant differences in tumor incidence or tumor multiplicity between the NNK+10% lyophilized strawberry group and the NNK control group. Similarly, at 24 weeks, there were no differences in tumorigenesis between the B[a]P+10% lyophilized strawberry group and the B[a]P control group. Therefore, lyophilized strawberries at 10% in the diet failed to inhibit NNK- and B[a]P-induced mouse lung tumorigenesis.
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