Abstract
Blood serum glutathione peroxidase activity and blood selenium concentration were measured in blood samples from pigs subjected to experimentally induced selenium deficiency and dietary selenium supplementation on graded levels. A highly significant correlation between blood selenium and serum GSH-Px activity in pigs, especially in selenium deficient pigs, was demonstrated. There was also a strong relationship between blood selenium concentration and serum GSH-Px activity in pigs receiving dietary selenium at graded levels. Serum GSH-Px activity exhibited an excellent close-response relationship to dietary selenium. Linear regression analysis showed that the increased serum GSH-Px activity was a function of the dietary selenium concentration. The fitness of serum in monitoring slight changes of the selenium status of pigs with help of the estimation of GSH-Px activity was discussed. The measurement of serum GSH-Px activity seems to provide a useful and rapid means for defining selenium requirements and for identifying selenium deficiency in growing pigs.
Keywords: serum glutathione peroxidase, blood selenium, dietary selenium, pigs
Sammanfattning
Blodserumglutationperoxidas-aktivitet och blodselenkoncentration mättes i blodprov från grisar vilka var utsatta för experimentellt in- ducerad selenbrist och dietär supplementering med selen på olika nivåer. Höggradigt signifikant korrelation mellan blodselen och serum GSH-Px aktivitet hos grisar, speciellt hos grisar utsatta för selenbrist, påvisades. Ett starkt samband konstaterades vidare föreligga mellan blodselenkoncentration och serum GSH-Px aktivitet hos grisar som fick selentillskott på olika nivåer i kosten. Höggradigt signifikant korrelation förelåg mellan serum GSH-Px aktivitet och dietärt intag av selen. Valet av serum vid glutationperoxidas-analyser för att avläsa grisens selenstatus diskuteras. Det fastslás att bestämning av serum- glutationperoxidas-aktivitet är en väl användbar och snabb metod för att fastställa selenbehov och att diagnostisera tillstånd av selen- brist hos växande grisar.
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