The study comprised 25 mature horses and incorporated five dietary treatments; a negative control (C: 0.085 ppm of Se in the diet), 3 levels of organic Se supplementation (S2, S3 and S4; 0.2, 0.3 and 0.4 ppm of Se on DM respectively) and one positive control supplemented with Na selenite (N3: 0.3 ppm of Se on DM). Diets were offered for 112 days (supplementary period) after which horses were blood sampled to determine GSH-Px activity. Sampling was repeated at 28 day intervals for the following 112 days (post-supplementary period). Increased GSH-Px activity was observed with ascending concentrations of dietary Se following the supplementary period. GSH-Px activities are still notably higher at the end of the post-supplementary period in S2, S3, S4 and N3 when compared to C, although rates of decline were greatest in those treatments with the highest levels of selenium supplementation. Furthermore, GSH-Px activity was better maintained in those animals that had received organic Se following the withdrawal of Se supplements. Therefore, from a nutritional viewpoint, organic forms of Se are superior to selenite as GSH-Px activity is maintained during periods of Se inadequacy.

Calamari, L., Piccioli Cappelli, F., Ferrari, A., Bertin, G., Glutathione peroxidase responses in mature horses following the withdrawal of an organic selenium supplement., <<ITALIAN JOURNAL OF ANIMAL SCIENCE>>, 2007; (6 (Suppl)): 275-277 [http://hdl.handle.net/10807/22737]

Glutathione peroxidase responses in mature horses following the withdrawal of an organic selenium supplement.

Calamari, Luigi;Piccioli Cappelli, Fiorenzo;Ferrari, Annarita;
2007

Abstract

The study comprised 25 mature horses and incorporated five dietary treatments; a negative control (C: 0.085 ppm of Se in the diet), 3 levels of organic Se supplementation (S2, S3 and S4; 0.2, 0.3 and 0.4 ppm of Se on DM respectively) and one positive control supplemented with Na selenite (N3: 0.3 ppm of Se on DM). Diets were offered for 112 days (supplementary period) after which horses were blood sampled to determine GSH-Px activity. Sampling was repeated at 28 day intervals for the following 112 days (post-supplementary period). Increased GSH-Px activity was observed with ascending concentrations of dietary Se following the supplementary period. GSH-Px activities are still notably higher at the end of the post-supplementary period in S2, S3, S4 and N3 when compared to C, although rates of decline were greatest in those treatments with the highest levels of selenium supplementation. Furthermore, GSH-Px activity was better maintained in those animals that had received organic Se following the withdrawal of Se supplements. Therefore, from a nutritional viewpoint, organic forms of Se are superior to selenite as GSH-Px activity is maintained during periods of Se inadequacy.
2007
Inglese
Calamari, L., Piccioli Cappelli, F., Ferrari, A., Bertin, G., Glutathione peroxidase responses in mature horses following the withdrawal of an organic selenium supplement., <<ITALIAN JOURNAL OF ANIMAL SCIENCE>>, 2007; (6 (Suppl)): 275-277 [http://hdl.handle.net/10807/22737]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10807/22737
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