US Geological Survey, National Wildlife Health Center, Madison, Wisconsin, USA.
Environ Toxicol Chem. 2011 Jun;30(6):1479-81. doi: 10.1002/etc.522. Epub 2011 Apr 2.
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.
本研究沿美国阿拉斯加波弗特海（Beaufort Sea）海岸采集了长尾鸭（Clangula hyemalis）和普通潜鸭（Somateria mollissima）的血液样本，检测了全血硒浓度与总谷胱甘肽过氧化物酶、硒依赖性谷胱甘肽过氧化物酶和谷胱甘肽还原酶的血浆活性之间的关系。两种物种的血液硒浓度均>8µg/g 湿重。线性回归表明，只有在长尾鸭中，总谷胱甘肽过氧化物酶和硒依赖性谷胱甘肽过氧化物酶的活性与硒浓度呈显著正相关，这表明这些鸟类可能正在经历早期氧化应激。
