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Selenium Content and Glutathione Peroxidase Activity in Tissues of the Dairy Cow after Short-Term Feeding^1,2,

Department of Dairy Science, Ohio Agricultural Research and Development Center, Wooster 44691

ABSTRACT

The effect of selenium and vitamin E on concentrations of selenium and selenium-dependent glutathione peroxidase in tissues of dairy cows was studied. Selenium (5 mg/day) and vitamin E (2 g/day) were supplemented for 10 days in a 2 x 2 factorial arrangement. Selenium supplementation increased content of selenium in whole blood, plasma, ovary, and liver and increased activity of selenium-dependent glutathione peroxidase in liver. Activity of selenium-dependent glutathione peroxidase in follicular fluid was closely correlated with selenium-dependent glutathione peroxidase in plasma. Significant activity of selenium-dependent glutathione peroxidase was detected in luteal tissue of the ovary. Relationships were linear between content of selenium and selenium-dependent glutathione peroxidase in ovary, uterus, and adrenal tissues.

¹ Salaries and research support provided by State and Federal Funds appropriated to Ohio Agricultural Research and Development Center. Journal Article No. 120-83.

² This research supported by USDA Grant P. L. 89-106.

³ Present address: Western Washington Research and Extension Center, Washington State University, Puyallup, WA 98371.