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Anim Sci J. 2018 Aug;89(8):1169-1177. doi: 10.1111/asj.13031. Epub 2018 May 16.

Dietary intake of iodine-enriched eggs decreases the incidence of mouse mammary tumors caused by the activated ErbB2 oncogene.

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Graduate School of Agricultural Sciences, Tohoku University, Aoba-ku, Sendai, Japan.
Central Experimental Animal Center, Teikyo University School of Medicine, Tokyo, Japan.
Graduate School of Science and Engineering, Iwate University, Ueda, Morioka, Japan.
Soft-Path Engineering Research Center (SPERC), Iwate University, Morioka, Japan.


Human epigenetic studies suggest that consumption of seaweed prevents mammary cancer, which possibly is explained by iodine daily intake. In this study, we evaluated the efficacy of dietary intake of iodine-enriched eggs on mammary tumor incidence caused by the expression of activated type ErbB2. Female transgenic mice were divided into three groups, and fed a basic diet, a diet supplemented with ordinary eggs, or with iodine-enriched eggs. The number of mammary tumors greater than 5 mm in diameter was recorded in mice at 6 months of age. We report that the average number of mammary tumors per mouse was significantly lower in the iodine-enriched egg-added diet group than in either the basic diet or ordinary egg diet groups. These results indicate that iodine intake through livestock-derived products can reduce the incidence of mammary cancers caused by the expression of activated type ErbB2.


cancer prevention; iodine enriched egg; mammary cancers


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