Temporal Variations in Blood Glutathione Peroxidase (GSHPx) Activity in Sheep at Pasture in a Mediterranean Area

Andrés, S.; Mañé, M. C.; Sánchez, J.; Barrera, Rafael; Jiménez, Antonio

doi:10.1053/tvjl.1998.0279

Cited by 12 publications

(8 citation statements)

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“…SOD catalyses the dismutation of superoxide to hydrogen peroxide (H 2 O 2 ) and it is considered the first defence against pro-oxidants (Halliwell & Chirico, 1993). Studies in grazing sheep have shown that GSH-Px activity is influenced by soil and pasture characteristics (Andrés et al, 1997) and by season (Andrés et al, 1999). In dairy goats SOD activity is decreased during the postpartum period probably a consequence of lower peroxide generation as testified by the decrease in ROMs concentrations (Celi et al).…”

Section: Antioxidantsmentioning

confidence: 99%

The role of oxidative stress in small ruminants' health and production

2010

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Section: Antioxidantsmentioning

confidence: 99%

The role of oxidative stress in small ruminants' health and production

2010

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“…The climate is typically Mediterranean and it is characterized by hot summers creating the conditions for the animals potentially to experience oxidative stress. Studies in grazing sheep have shown that GSH-Px activity is influenced by soil and pasture characteristics (André s et al, 1997) and by season (André s et al, 1999). It seems, then, that ROMs and anti-oxidants may be involved in some relevant physiological functions such as milk yield (Gabai et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

The effect of hot season and nutrition on the oxidative status and metabolic profile in dairy goats during mid lactation

et al. 2006

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The aim of this study was to evaluate the effects of the hot season and nutrition on the oxidative status and metabolic\ud profile of lactating goats during mid lactation. Twenty-four Red Syrian goats were allocated into three groups that were\ud offered the following diets: natural pasture (P), pasture þ 500 g/h per day of concentrate (PC) and hay plus 500 g/h per\ud day of concentrate (HC). Blood samples were taken in spring (85 ^ 7 days in milk (DIM)) and summer (120 ^ 7 DIM)\ud and assayed for reactive oxygen metabolites (ROMs), a-tocopherol, glucose, triglycerides, cholesterol, non-esterified\ud fatty acids, total protein, albumin and globulin concentrations and glutathione peroxidase (GHS-Px) and superoxide\ud dismutase (SOD) activities. Milk yield and milk composition were also measured. SOD, GSH-Px and ROMs levels\ud increased during summer when temperature humidity index values were high. The increase in ROMs in the PC and HC\ud groups could be ascribed to the improved nutritional regime and to their higher production level. The markers of the\ud oxidative status and of the metabolic profile measured in this study indicate that goats may have experienced moderate\ud oxidative stress. It seems that, seasonal rather than nutritional factors have a more pronounced effect on oxidative\ud status markers. Concentrate supplementation sustained milk yield and may represent a useful means to extend the\ud lactation period in dairy goats during late spring and summer

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“…These results are close to the relationship obtained in our study (Figure 1). Moreas (1986) It is interesting to note that in regions marginally deficient in selenium, signs of ill-thriftiness and WMD in grazing animals are more frequently diagnosed in the dry period (Andres, 1999). Hence there is a need to study further seasonal variations in the Vojvodina region.…”

Section: Discussionmentioning

confidence: 99%

Selenium status of sheep and their lambs in the Northern Serbian province of Vojvodina

Pešut¹,

Jovanovic²,

Gvozdić³

et al. 2004

Acta vet. (Beogr.)

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The blood plasma concentrations of selenium and plasma and whole blood GSH-Px activities were determined in 30 sheep on three farms (A=Kać, B=Ečka and C=Čoka) in marginally deficient areas of Vojvodina. Selenium concentrations in feedstuffs from the territories surrounding the studied farms were lower than 0.10 ppm in more than 90% of the samples. Plasma selenium concentrations in sheep from farms A, B and C were 83.44 ± 19.09 μg/L; 183.90 ± 37.10 μg/L and 82.14±25.09 μg/L respectively. Plasma GSH-Px activity was the lowest on farm B (0.70 ± 0.37 μkat/L), nonsignificantly higher on farm A (0.81 ± 0.40 μkat/L) and highest on farm C (1.66 ± 0.88 μkat/L). Mean whole blood GSH-Px activities ranged between 194.38 μkat/L (farm C) and 236.51 μkat/L (farm B). On farm A the blood plasma concentrations of selenium and plasma and whole blood GSH-Px activities were determined also in suckling lambs in relation to their mothers. Plasma selenium content in lambs (50.58 ± 10.06 μg/L) was lower than in adult sheep at the same location. Both plasma (0.81 ± 0.40 μkat/L) and whole blood (424.21 ± 117.19 μkat/L) GSH-Px activities were significantly higher in lambs compared to their dams

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Temporal Variations in Blood Glutathione Peroxidase (GSHPx) Activity in Sheep at Pasture in a Mediterranean Area

Cited by 12 publications

References 0 publications

The role of oxidative stress in small ruminants' health and production

The role of oxidative stress in small ruminants' health and production

The effect of hot season and nutrition on the oxidative status and metabolic profile in dairy goats during mid lactation

Selenium status of sheep and their lambs in the Northern Serbian province of Vojvodina

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