Adaptation of the blood antioxidant defence mechanisms of sheep with a genetic lesion resulting in low red cell glutathione concentrations

D B Mcphail, P C Morrice, G G Duthie

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Finnish Landrace sheep with a genetic lesion which results in restricted cysteine transport across the red cell membrane have total glutathione concentrations in their red blood cells that are approximately 40% of those in normal sheep of the same breed. However, dimethyldisulphide-challenged red blood cells from both phenotypes produce an ESR-spin adduct at similar rates. The resistance of the low glutathione phenotype red cells to oxidant challenge is reflected by increases in the activities of antioxidant enzymes. Sheep with a genotypic disorder in cysteine transport may be a suitable model for studying the genetic expression of antioxidant enzymes in response to oxidant loads.

Original languageEnglish
Pages (from-to)177-181
Number of pages5
JournalFree Radical Research Communications
Issue number3
Publication statusPublished - 1993


  • glutathione
  • antioxidants
  • ESR
  • sheep
  • lipid-peroxidation
  • free-radicals
  • acid

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