Seasonal variation of glutathione peroxidase, CK and AST in sheep in a low-selenium region

M. López Alonso, M. Miranda, J. Herandez, C. Castillo, I. Ayala, J. Benedito
1997 Journal of Animal and Feed Sciences  
Blood glutathione peroxidase (GSH-Px; E.C. activity, a measure of selenium status, as well as the plasma indicators of muscle damage creatine kinase (CK; E.C. and aspartate aminotransferase (AST; E.C. were evaluated in sheep in a region with low selenium levels during the spring and the summer, because this time may be critical for suffering selenium deficiencies. GSH-Px activity was highest during the spring, when mean values ranged from 74.16 and 90.51 Ul/g Hb,
more » ... ending drastically during the summer, below physiological levels (P < 0.001) with mean values ranging from 43.33 to 50.01 Ul/g Hb. GSH-Px activity, within the deficiency range, registered during the summer did not originate muscle damage, since the muscle enzymes CK and AST were within their normal range.
doi:10.22358/jafs/69530/1997 fatcat:7u4dtnpbe5dexgm3hxvhghudwe