绵羊中硒的胎盘转运
The placental transmission of selenium in sheep.
作者信息
Jacobsson S O, Oksanen H E
出版信息
Acta Vet Scand. 1966;7(1):66-76. doi: 10.1186/BF03547098.
The placental transmission of selenium was investigated in thirteen ewes during late gestation. The ewes were injected either with Se-sodium selenite, Se(L)-selenocystine or Se (L)-selenomethionine. Twelve lambs and nine ewes were killed soon after delivery and the Se-concentration was measured in the tissues of the lambs and ewes. The Se-concentration in the tissues of the lambs was about half that of the ewes when they were injected with selenite. This indicates that the placenta constitutes to a certain extent a barrier for the passage of inorganic selenium. Se-selenomethionine and Se-selenocystine were more easily transferred across the placenta than Se-sodium selenite. When the selenite dose was increased ten times the selenium uptake in milligrams per gram tissue in the lambs increased 5–8 times.
在妊娠后期对13只母羊的硒胎盘转运情况进行了研究。给这些母羊分别注射亚硒酸钠、L-硒代胱氨酸或L-硒代蛋氨酸。12只羔羊和9只母羊在分娩后不久被宰杀，并测定了羔羊和母羊组织中的硒浓度。当给母羊注射亚硒酸盐时，羔羊组织中的硒浓度约为母羊的一半。这表明胎盘在一定程度上构成了无机硒通过的屏障。L-硒代蛋氨酸和L-硒代胱氨酸比亚硒酸钠更容易通过胎盘转运。当亚硒酸盐剂量增加10倍时，羔羊每克组织中硒的摄入量增加了5 - 8倍。
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