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Table 8 Effect of the dietary arginine level in a low-protein diet on anti-oxidative parameters in tissues1

From: The optimal dietary arginine level of laying hens fed with low-protein diets

Item, nmol/mg prot Control2 Dietary arginine level in LP diet, %3 P-value
0.80 0.85 0.90 0.95 1.00
Diet4 Linear5 Quadratic5
Liver
 MDA 0.33 ± 0.03 0.35 ± 0.05 0.38 ± 0.03 0.36 ± 0.03 0.36 ± 0.04 0.40 ± 0.03 0.772 0.428 0.836
 Protein carbonyl 1.56 ± 0.07 1.55 ± 0.14 1.27 ± 0.04 1.32 ± 0.07 1.72 ± 0.22 1.31 ± 0.08 0.059 0.619 0.747
 T-AOC 78.9 ± 4.31a 74.6 ± 3.39ab 73.5 ± 4.81ab 72.0 ± 4.09abc 65.5 ± 3.28bc 61.0 ± 2.30c 0.022 0.003 0.370
Duodenum
 MDA 1.08 ± 0.16ab 0.73 ± 0.07b 0.60 ± 0.11b 1.20 ± 0.23ab 1.25 ± 0.14ab 1.62 ± 0.42a 0.027 0.002 0.592
 Protein carbonyl 1.91 ± 0.09 1.88 ± 0.44 1.96 ± 0.23 1.98 ± 0.18 2.12 ± 0.16 1.67 ± 0.18 0.885 0.814 0.347
 T-AOC 169.5 ± 6.6bcd 188.4 ± 6.3ab 195.0 ± 10.8a 180.1 ± 6.5abc 164.7 ± 6.0cd 150.6 ± 5.7d < 0.001 < 0.001 0.127
Jejunum
 MDA 0.27 ± 0.05b 0.34 ± 0.08ab 0.22 ± 0.03b 0.34 ± 0.03ab 0.37 ± 0.05ab 0.47 ± 0.07a 0.044 0.032 0.108
 Protein carbonyl 2.15 ± 0.58 2.87 ± 0.55 1.61 ± 0.32 2.43 ± 0.68 1.55 ± 0.32 2.81 ± 0.58 0.347 0.733 0.163
 T-AOC 289.0 ± 17.7a 274.4 ± 10.3a 275.0 ± 11.7a 262.6 ± 11.9ab 269.2 ± 19.8ab 222.1 ± 11.5b 0.007 0.021 0.176
Ileum
 MDA 0.56 ± 0.10 0.61 ± 0.13 0.43 ± 0.05 0.67 ± 0.10 0.60 ± 0.12 0.52 ± 0.06 0.603 0.924 0.837
 Protein carbonyl 2.18 ± 0.29 1.91 ± 0.09 2.32 ± 0.20 2.48 ± 0.28 1.89 ± 0.21 2.31 ± 0.14 0.319 0.452 0.246
 T-AOC 283.8 ± 11.5 290.7 ± 14.2 281.9 ± 5.2 270.7 ± 9.1 281.6 ± 4.2 255.9 ± 8.5 0.205 0.028 0.752
  1. 1Data were presented as the mean ± SD (n = 8). Malondialdehyde (MDA) contents, Total antioxidant capacity (T-AOC)
  2. 2The control hens were fed a diet with 16% protein level
  3. 3The experimental groups were provided a 14% protein diets (0.80% Arginine) supplemented with 0, 0.05%, 0.10%, 0.15%, and 0.20% L-Arg
  4. 4Diet = effect of all the dietary treatments
  5. 5Linear and quadratic = effect of dietary arginine from 0.80% to 1.00% treatments
  6. a-d: Means with different superscripts within the same column differ significantly, P < 0.05