Blood selenium concentrations and enzyme activities related to glutathione metabolism in wild emperor geese
作者:J. Christian Franson、David J. Hoffman、Joel A. Schmutz
DOI:10.1002/etc.5620211022
日期:2002.10
relationship to selenium in the blood of wild birds. Adult female emperor geese incubating their eggs in mid-June had a higher mean concentration of selenium in their blood and a greater activity of glutathione peroxidase in their plasma than adult geese or goslings that were sampled during the adult flight feather-molting period in late July and early August. Glutathione peroxidase activity was positively
1998 年,我们在美国阿拉斯加西部育空-库斯科克维姆三角洲 (YKD) 的繁殖地采集了 63 只帝雁 (Chen canagica) 的血样。我们研究了全血中硒浓度与血浆中谷胱甘肽过氧化物酶和谷胱甘肽还原酶活性之间的关系。实验研究表明,这些酶的血浆活性是硒诱导的氧化应激的有用生物标志物,但关于它们与野生鸟类血液中硒的关系的信息很少。6 月中旬孵化卵的成年雌性帝鹅血液中硒的平均浓度更高,血浆中谷胱甘肽过氧化物酶的活性高于 7 月下旬成年飞羽换羽期间采集的成年鹅或雏鹅和八月初。谷胱甘肽过氧化物酶活性与帝雁血硒浓度呈正相关,幼鹅相对于硒的升高幅度大于成年鹅。谷胱甘肽还原酶的活性在雏鹅血浆中最高,在蜕皮的成年雏鹅中比在孵化的雌雏中更高,但与成年雏鹅或雏鹅血液中的硒没有显着相关性。孵化的雌性帝鹅血液中的硒浓度很高,伴随着与早期氧化应激一致的谷胱甘肽过氧化物酶活性增加。这些发现表明,有必要在该物种中