Selenium inhibition of N-methyl-N-nitrosourea-induced mammary carcinogenesis in the rat.J Natl Cancer Inst 1980 Dec;65(6):1299-301 Thompson HJ; Becci PJ The effect of supplemental dietary selenium on the postinitiation state of N-methyl-N-nitrosourea (MNU)- induced mammary carcinogenesis was investigated in noninbred female Sprague-Dawley rats. Mammary cancer was induced by a single iv injection of MNU. Supplemental selenium feeding was begun 7 days after carcinogen treatment. Feeding of selenium prolonged the latency of mammary cancer appearance and resulted in a reduction in the average number of cancers per rat. The results suggested an inhibitory effect of pharmacologic levels of dietary selenium on the postinitiation stage of mammary carcinogenesis. |
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