title: Vitamin E is the major contributor to the antioxidant capacity in lambs fed whole dried citrus pulp.
abstract: The aim of this study was to investigate the effect of dietary whole dried citrus pulp (DCP) on the antioxidant status of lamb tissues. In total, 17 lambs were divided into two groups and fed for 56 days: a barley-based concentrate diet (CON - eight animals), or a concentrate-based diet including 35% DCP to partially replace barley (CIT - nine animals). The CIT diet contained a double concentration of phenolic compounds than the CON diet (7.9 v. 4.0 g/kg dry matter (DM), respectively), but had no effect (P>0.05) on the overall antioxidant capacity of the hydrophilic fraction of blood plasma, liver and muscle. The CIT diet contained clearly more α-tocopherol than the CON diet (45.7 v. 10.3 mg/kg DM), which could explain the higher concentration of α-tocopherol in liver, plasma and muscle (P<0.05). The dietary treatment had no effect on the extent of lipid peroxidation, measured as thiobarbituric acid and reactive substances assay (TBARS values) in the faeces, small intestine, liver, plasma and muscle. Nevertheless, when muscle homogenates were incubated in the presence of Fe3+/ascorbate to induce lipid peroxidation, the muscle from lambs fed DCP displayed lower TBARS values (P<0.01), which negatively correlated with the concentration of α-tocopherol in muscle. These results showed that feeding whole DCP to ruminants increases the antioxidant status of muscle through an increase in the deposition of α-tocopherol.
authors: 1Dipartimento di Scienze Agrarie Alimentari e Ambientali,Università degli Studi di Perugia,Borgo XX Giugno 74,06121,Perugia,Italy.
authors: G
authors: G
authors: Luciano
authors: 1Dipartimento di Scienze Agrarie Alimentari e Ambientali,Università degli Studi di Perugia,Borgo XX Giugno 74,06121,Perugia,Italy.
authors: V
authors: V
authors: Roscini
authors: 1Dipartimento di Scienze Agrarie Alimentari e Ambientali,Università degli Studi di Perugia,Borgo XX Giugno 74,06121,Perugia,Italy.
authors: S
authors: S
authors: Mattioli
authors: 1Dipartimento di Scienze Agrarie Alimentari e Ambientali,Università degli Studi di Perugia,Borgo XX Giugno 74,06121,Perugia,Italy.
authors: S
authors: S
authors: Ruggeri
authors: 2School of Agriculture and Food Science,University College Dublin,Belfield,Dublin 4,Dublin,Ireland.
authors: R S
authors: RS
authors: Gravador
authors: 3Dipartimento di Agricoltura, Alimentazione e Ambiente,Università degli Studi di Catania,Via Valdisavoia 5,95123,Catania,Italy.
authors: A
authors: A
authors: Natalello
authors: 3Dipartimento di Agricoltura, Alimentazione e Ambiente,Università degli Studi di Catania,Via Valdisavoia 5,95123,Catania,Italy.
authors: M
authors: M
authors: Lanza
authors: 3Dipartimento di Agricoltura, Alimentazione e Ambiente,Università degli Studi di Catania,Via Valdisavoia 5,95123,Catania,Italy.
authors: A
authors: A
authors: De Angelis
authors: 3Dipartimento di Agricoltura, Alimentazione e Ambiente,Università degli Studi di Catania,Via Valdisavoia 5,95123,Catania,Italy.
authors: A
authors: A
authors: Priolo
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D002957:Citrus / Q000737:chemistry*; D004032:Diet / Q000662:veterinary; D008297:Male; D059808:Polyphenols / Q000737:chemistry*; D011897:Random Allocation; D034561:Sheep, Domestic / Q000502:physiology*; D014810:Vitamin E / Q000378:metabolism*
chemical_list: D000975:Antioxidants; D059808:Polyphenols; D014810:Vitamin E
keywords: 
                 α-tocopherol; antioxidant; citrus pulp; phenolic compounds; ruminants