alexa Inhibition of 7,12-dimethylbenzanthracene-induced rat mammary tumor growth by 2,3,7,8-tetrachlorodibenzo-p-dioxin.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Steroids & Hormonal Science

Author(s): Holcomb M, Safe S

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Abstract 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) and related compounds inhibit diverse estrogen-induced responses in the rodent uterus and human breast cancer cells. The effects of a single non-toxic dose of TCDD (10 micrograms/kg) on the development of mammary tumors was investigated in female Sprague-Dawley rats treated with an oral dose of 7,12-dimethylbenzanthracene (DMBA) (20 mg). In rats which developed mammary tumors, subsequent treatment with corn oil (vehicle) resulted in a 3.9-fold increase in mammary tumor volume after 21 days. In contrast, a second group of rats with mammary tumors were treated with a non-toxic dose of TCDD (10 micrograms/kg) and after 21 days, the mean tumor volumes decreased from 89.7 +/- 53 mm3 to 24.9 +/- 28.5 mm3. Moreover, these results demonstrate the antitumorigenic activity of TCDD in female Sprague-Dawley rats.
This article was published in Cancer Lett and referenced in Journal of Steroids & Hormonal Science

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