PSV-14 Antioxidant status and reproductive performance of sows supplemented with high levels of selected vitamins and trace minerals during the peri-ovulatory period
Notice bibliographique
Résumé
Abstract The present study evaluated the use of high levels of selected trace minerals and vitamins with antioxidant properties to alleviate the peri-ovulatory oxidative burst in sows and improve within-litter homogeneity. Seventy four Yorkshire-Landrace multiparous sows were used in a completely randomized arrangement with two dietary treatments: CTR: regular gestation diet or; TRT: regular gestation diet supplemented with supranutritional levels of copper, manganese, selenium, vitamins A, E, B6, and C (Table 1). Blood samples were collected eight days before the predicted oestrus (d13), the day after the onset of oestrus (d21), and five days later (d26) for the determination of plasma concentrations of retinol, pyridoxal-5-phosphate, copper, and selenium as well as protein carbonyl and 8-hydroxyguanosine (markers of oxidative stress) and the activity of the antioxidant enzymes superoxide dismutase, glutathione peroxidase, and catalase in plasma. Sows reproductive performance (body weight, backfat depth, litter size, stillbirth, piglets birthweight, litter homogeneity) was assessed. Plasma selenium and pyridoxal-5-phosphate concentrations were similar between treatments at d13, increased significantly for TRT at d21 and decreased to CTR levels by d26 (P ≤ 0.01). No effect of treatment was detected on plasma retinol and copper concentrations (P ≥ 0.61). No effect of treatment was detected on plasma superoxide dismutase and catalase activities (P ≥ 0.52). Although not statistically different (P = 0.11), glutathione peroxidase activity increased almost 10 % from d21 to d26 in TRT sows compared to less than 3 % in the CTR group. No effect of treatment was detected on plasma protein carbonyl and 8-hydroxyguanosine concentrations (P ≥ 0.23). However, time effects were detected. Plasma copper concentrations were not different between d13 and d21 but decreased at d26 (P = 0.06) whereas plasma retinol concentrations were lowest at d13 and did not differ between d21 and d26 (P = 0.03). Plasma superoxide dismutase activity was lowest at d13, highest at d21, intermediary at d26 (P < 0.01) whereas plasma glutathione peroxidase activity was lowest at d21 and did not differ between d13 and d26 (P < 0.01) and plasma catalase activity was not different between d13 and d21 but increased at d26 (P = 0.04). Plasma protein carbonyl concentrations was highest at d13 and did not differ between d21 and d26 (P < 0.01). Plasma 8-hydroxyguanosine concentrations were not different between d13 and d21 but decreased at d26 (P = 0.01). No effect of treatment was detected on sows reproductive performance (P ≥ 0.17). In conclusion, although supplementation of trace minerals and vitamins with antioxidant properties at high dietary levels enhanced the plasma concentration of some of these nutrients, it had little impact on the modulation of the antioxidant system during the peri-ovulatory period, which apparently did not induce systemic oxidative stress multiparous sows.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».