Article (Scientific journals)
Selenium in the environment, metabolism and involvement in the body functions
Mehdi, Youcef; Hornick, Jean-Luc; Istasse, Louis et al.
2013In Molecules, 13 (3), p. 3292-3311
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Keywords :
selenium; environment; selenium metabolism; antioxydant; deficiency; reproduction; selenoprotein
Abstract :
[en] Selenium (Se34 79) is a metalloid which is close to sulfur (S) in terms of properties. The Se concentration in soil varies with type, texture and organic matter content of the soil and with rainfall. Its assimilation by plants is influenced by the physico-chemical properties of the soil (redox status, pH and microbial activity). The presence of Se in the atmosphere is linked to natural and anthropogenic activities. Selenoproteins, in which selenium is present as selenocysteine, present an important role in many body functions, such as antioxidant defense and the formation of thyroid hormones. Some selenoprotein metabolites play a role in cancer prevention. In the immune system, selenium stimulates antibody formation and activity of helper T cells, cytotoxic T cells and Natural Killer (NK) cells. The mechanisms of intestinal absorption of selenium differ depending on the chemical form of the element. Selenium is mainly absorbed in the duodenum and caecum by active transport through a sodium pump. The recommended daily intake of selenium varies from 60 μg/day for women, to 70 μg/day for men. In growing ruminants the requirements are estimated at 100 μg/kg dry matter and 200 μg/Kg for pregnant or lactating females. A deficiency can cause reproductive disorders in humans and animals.
Disciplines :
Animal production & animal husbandry
Life sciences: Multidisciplinary, general & others
Author, co-author :
Mehdi, Youcef ;  Université de Liège - ULiège > Doct. sc. vété. (Bologne)
Hornick, Jean-Luc  ;  Université de Liège - ULiège > Département de productions animales > Nutrition animale en milieu tropical
Istasse, Louis ;  Université de Liège - ULiège > Département de productions animales > Nutrition des animaux domestiques
Dufrasne, Isabelle  ;  Université de Liège - ULiège > Département de productions animales > Nutrition des animaux domestiques
Language :
English
Title :
Selenium in the environment, metabolism and involvement in the body functions
Publication date :
2013
Journal title :
Molecules
eISSN :
1420-3049
Publisher :
MDPI, Basel, Switzerland
Volume :
13
Issue :
3
Pages :
3292-3311
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 June 2013

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