Abstract
Selenium added to the diet significantly lowers the incidence of spontaneous mammary adenocarcinoma in female inbred C3H/St mice infected with the Bittner Milk Factor. Lead, 5 ppm, added to the drinking water in the form of the acetate, diminishes the uptake of selenium and reduces its anticarcinogenic effects, causing mammary tumors to appear with the same high incidence as in Se-unsupplemented controls. At higher lead concentrations in the drinking water (25 ppm), the overall tumor incidence is lowered, but tumor growth is significantly accelerated and the survival of tumor-bearing mice is shortened. Under the conditions of administration chosen, lead acts as a selenium antagonist and lowers the concentrations of selenium in liver, kidney, and spleen. The deposition of selenium, copper, and arsenic in bone is increased as compared to lead-unexposed controls.
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Schrauzer, G.N., Kuehn, K. & Hamm, D. Effects of dietary selenium and of lead on the genesis of spontaneous mammary tumors in mice. Biol Trace Elem Res 3, 185–196 (1981). https://doi.org/10.1007/BF02990116
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DOI: https://doi.org/10.1007/BF02990116
Index Entries
- Selenium, effect on mammary tumorigenesis
- lead, effect on mammary tumorigenesis
- mammary tumors, effects of Se and Pb on
- tumorigenesis, effects of Se and Pb on mammary
- mice, C3H/St, effects of Se and Pb on mammary tumorigenesis in
- liver, Se in
- kidney, Se in
- spleen, Se in
- bone
- Se, Cu, and As in
- Cu, in bone
- As, in bone