Supplementation of by-products from grape, tomato and myrtle affects antioxidant status of dairy ewes and milk fatty acid profile.
blood
by-products
dairy sheep
milk fatty acid
oxidative stress
Journal
Journal of animal physiology and animal nutrition
ISSN: 1439-0396
Titre abrégé: J Anim Physiol Anim Nutr (Berl)
Pays: Germany
ID NLM: 101126979
Informations de publication
Date de publication:
Mar 2020
Mar 2020
Historique:
received:
03
10
2019
revised:
18
12
2019
accepted:
31
12
2019
pubmed:
29
1
2020
medline:
17
12
2020
entrez:
29
1
2020
Statut:
ppublish
Résumé
The aim of this study was to evaluate the effect of diets containing different dried by-products on milk and blood plasma antioxidant capacity of dairy ewes. Thirty-six Sarda ewes were assigned to four treatments: control (CON; no by-product), 100 g/day of grape marc (GM), 100 g/day tomato pomace (TP) and 75 g/day of exhausted myrtle berries (EMBs). The superoxide dismutase (SOD), glutathione reductase (GR), glutathione transferase (GST) and glutathione peroxidase (GSH-Px) in blood, and SOD, GR and lactoperoxidase (LPO) in milk were determined. Total antioxidant capacity (FRAP and ABTS assays), malondialdehyde (MDA) and protein carbonyls (PCs) were also measured. Milk fatty acid profile was investigated by gas chromatography. The results showed higher antioxidant capacity measured by FRAP or ABTS assays and a reduction in MDA in GM plasma than CON. All by-products enhanced the protection of milk proteins by oxidation, as evidenced by lower values of PCs compared with CON. GM supplementation increased PUFAn-6, due to increase in C18:2n-6, the main component of GM compared with CON. All by-products did not modify the nutritional indexes of milk fat. In conclusion, dietary GM may enhance protection against oxidative condition of dairy ewes, whereas TP and EMB need further research to define the optimum inclusion level in sheep diet.
Substances chimiques
Antioxidants
0
Fatty Acids
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
493-506Subventions
Organisme : ANT Ltd.
Organisme : University of Sassari and Mignini & Petrini® Feed Company
Informations de copyright
© 2020 Blackwell Verlag GmbH.
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