title: Selenium concentrations and enzyme activities of glutathione metabolism in wild long-tailed ducks and common eiders.
abstract: The relationships of selenium (Se) concentrations in whole blood with plasma activities of total glutathione peroxidase, Se-dependent glutathione peroxidase, and glutathione reductase were studied in long-tailed ducks (Clangula hyemalis) and common eiders (Somateria mollissima) sampled along the Beaufort Sea coast of Alaska, USA. Blood Se concentrations were >8 µg/g wet weight in both species. Linear regression revealed that the activities of total and Se-dependent glutathione peroxidase were significantly related to Se concentrations only in long-tailed ducks, raising the possibility that these birds were experiencing early oxidative stress.
authors.affiliation: US Geological Survey, National Wildlife Health Center, Madison, Wisconsin, USA. jfranson@usgs.gov
authors.forename: J Christian
authors.initials: JC
authors.lastname: Franson
authors.forename: David J
authors.initials: DJ
authors.lastname: Hoffman
authors.forename: Paul L
authors.initials: PL
authors.lastname: Flint
mesh_terms: D000413:Alaska; D000818:Animals; D004372:Ducks / Q000097:blood*; D005260:Female; D005978:Glutathione / Q000097:blood*; D005979:Glutathione Peroxidase / Q000097:blood; D005980:Glutathione Reductase / Q000097:blood; D008054:Lipid Peroxides / Q000097:blood; D008297:Male; D018384:Oxidative Stress; D012643:Selenium / Q000097:blood* / Q000633:toxicity; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism; D014131:Trace Elements / Q000097:blood* / Q000633:toxicity
chemical_list: D008054:Lipid Peroxides; D017392:Thiobarbituric Acid Reactive Substances; D014131:Trace Elements; D005979:Glutathione Peroxidase; D005980:Glutathione Reductase; D005978:Glutathione; D012643:Selenium