Influence of organic selenium supplementation on the accumulation of toxic and essential trace elements involved in the antioxidant system of chicken

Athanasios C Pappas (1) , Evangelos Zoidis (1) , Constantinos A Georgiou (2) , Nikolaos Demiris (3) , Peter F Surai (4) , Konstantinos Fegeros (1)

1 Nutritional Physiology and Feeding
2 Chemistry Laboratory
3 Animal Breeding and Husbandry
4 Division of Environmental and Evolutionary Biology

The aim of the study was to investigate the interactions between selenium (Se) and some trace elements, both toxic and essential, which are all involved in the antioxidant system. A total of 128 day-old chickens (Gallus gallus, broilers) were used to investigate the effect of Se yeast supplementation on the accumulation of cadmium (Cd), copper (Cu) iron (Fe) and zinc (Zn). There were 4 replicates of 4 dietary treatments: T1 (basal diet with no added Se, analyzed to contain 0.21 mg kg-1), T2 (T1 with 0.15 mg kg-1 Se added), T3 (T1 with 0.3 mg kg-1 Se) and T4 (T1 with 3.0 mg kg-1 Se). At 4th and 6th week, 2 chickens per replicate pen were sacrificed for whole blood, breast muscle and liver sample collections. Samples were analyzed by ICP-MS. Supplementation with Se-yeast, not only increased Se concentration but also reduced Cd concentration in the tissues. Selenium was negatively correlated with Cd and positively correlated with Zn, Cu and Fe. Cadmium was negatively correlated with Zn and Cu. Zinc was positively correlated with Cu. Iron was negatively correlated with Cu and uncorrelated with Zn and Cd. The balance between Se, Cu, Fe and Zn is important for proper antioxidant defense since they are integral part of various antioxidant enzymes.

Mots clés: Life Sciences

Athanasios C Pappas, Evangelos Zoidis, Constantinos A Georgiou, Nikolaos Demiris, Peter F Surai, et al.. Influence of organic selenium supplementation on the accumulation of toxic and essential trace elements involved in the antioxidant system of chicken. Food Additives and Contaminants, 2011, pp.1. ⟨10.1080/19440049.2010.549152⟩. ⟨hal-00671232⟩