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Table 7 Effect of dietary Met:Lys ratio in the lactation diet on oxidative stress parameters of sows

From: Different dietary methionine to lysine ratios in the lactation diet: effects on the performance of sows and their offspring and methionine metabolism in lactating sows

Items Met:Lys SEM P-value
0.27 0.37 0.47 0.57 Linear Quadratic Feed
No. of sows1
 At parturition
  GSH-Px, U/mL3 843.73 800.09 768.65 811.04 16.33 0.38 0.28 0.44
  T-AOC, U/mL3 0.77 0.59 0.98 0.95 0.06 0.07 0.44 0.08
  ROS, U/mL 36.49 30.83 41.48 41.65 2.27 0.44 0.62 0.30
  8-OHdG, ng/mL 37.44 33.07 37.72 33.26 1.83 0.66 0.91 0.70
  TBARS, nmol/mL 3.08 3.1 2.81 2.71 0.16 0.35 0.60 0.79
 At day 7
  GSH-Px, U/mL2,3 672.88B 811.65A 763.09A 621.40B 16.91 0.19 0.00 0.00
  T-AOC, U/mL2,3 0.30C 0.58B 1.00A 0.50BC 0.06 0.04 0.00 0.00
  ROS, U/mL 34.66 32.54 39.11 38.22 1.87 0.21 0.41 0.12
  8-OHdG, ng/mL2 50.05a 43.08ab 38.47b 38.78b 1.60 0.01 0.01 0.03
  TBARS, nmol/mL2 3.82b 3.78b 4.51ab 4.73a 0.15 0.01 0.02 0.04
 At weaning
  GSH-Px, U/mL2,3 632.84C 895.69A 773.88B 799.85B 17.92 0.03 0.00 0.00
  T-AOC, U/mL2,3 0.36B 0.62B 1.27A 1.36A 0.10 0.00 0.00 0.00
  ROS, U/mL 46.20 37.92 39.79 40.64 1.79 0.64 0.54 0.45
  8-OHdG, ng/mL2 50.56a 40.58b 49.15a 50.42a 1.37 0.58 0.31 0.02
  TBARS, nmol/mL 2.47 2.24 2.67 3.65 0.19 0.03 0.02 0.17
  1. 1The number of samples of sows in each group was more than 9 but not equal; SEM, standard error of the mean;
  2. 2Means in the same row with different letters differ significantly; the different lowercase letters represent P < 0.05, and the different capital letters represent P < 0.01;
  3. 3There was a treatment × sampling day interaction for plasma GSH-Px and T-AOC concentrations (P < 0.01), and the levels of GSH-Px and T-AOC in plasma at parturition and weaning were significantly higher than those at day 7 (P < 0.001);
  4. GSH-Px glutathione peroxidase, T-AOC total antioxidant capacity, ROS reactive oxygen species; 8-OHdG 8-hydroxy-deoxyguanosine; TBARS thiobarbituric acid reactive substances