Relationship between oxidative stress status and glycoprotein-associated pregnancy concentrations during the early pregnancy period in dairy cows

Authors : Abdelhanine Ayad, Priya Yuvaraju, Sumaya Beegam, Abderrahim Nemmar

Pages : 1-8

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Publication Date : 2020-03-10

Article Type : Research

Abstract :Objective: This study was planned to assess the possible relationships with PAG concentrations by the determination of the biomarkers of oxidative stress in the plasma of dairy cattle during the early period of gestation.  Materials and Methods: Blood samples were collected in pregnant females (n = 54) and non-pregnant females ( n = 45). Measurement of biomarkers of oxidative stress (LPO, GSH and SOD) was carried out in females using spectrophotometric method.  Results: The levels of SOD were significantly lower ( P < 0.05) in pregnant females from day 25 to 35 (7.08 ±0.31 U.ml -1 ) and day 36 to 50 after AI (6.6 ± 0.29 U.ml -1 ) compared with non-pregnant ones (7.59 ± 0.35 U.ml -1 ). Concerning the levels of LPO and GSH, the values obtained were also significant lower ( P < 0.05) in pregnant females in the period 25-35 days post AI (122.7 ±10.27 μM and 6.46 ±1.24 μmol/min.ml -1 , respectively) and 36-50 days post AI (108.05±6.17 μM and 6.2±0.77 μmol/min.ml -1 , respectively) than in the non-pregnant ones (124.8 ± 12.16 μM and 6.96 ± 0.92 μmol/min.ml -1 , respectively).  Conclusion: We have demonstrated that the markers of oxidative stress were higher in non-pregnant females compared with pregnant females during the early period of gestation in dairy cattle. 
Keywords : Bovine, Pregnancy, Oxidative stress