Table 8.
The effect of dietary Arg on intestinal antioxidant activities including malondialdehyde (MDA), protein carbonyl (PC), total Superoxide Dismutase (T-SOD), catalase (CAT), glutathione-S-transferase (GST), glutathione peroxidase (GPx), glutathione reductase (GR), total glutathione (T-GSH), anti-superoxide anion (ASA) and anti-hydroxyl radical (AHR) in yellow catfish fed with graded levels of Arg (g/kg) for 8 weeks.
| Ingredient | Arg 0.179% | Arg 0.211% | Arg 0.236% | Arg 0.268% | Arg 0.295% | Arg 0.326% | p-Value |
|---|---|---|---|---|---|---|---|
| MDA | 95.1 ± 5.4 e | 86.4 ± 6.9 cd | 77.7 ± 1.2 bc | 59.3 ± 2.4 a | 70.4 ± 2.1 ab | 76.5 ± 2.5 bc | <0.001 |
| PC | 140 ± 3.8 bc | 128 ± 3.8 bc | 121 ± 13.7 b | 83.3 ± 7.6 a | 125 ± 17.4 b | 163 ± 10.0 c | <0.001 |
| T-SOD | 79.2 ± 6.6 a | 92.0 ± 4.7 ab | 101.5 ± 4.9 b | 105.6 ± 2.3 b | 102.3 ± 1.9 b | 96.6 ± 2.5 b | 0.021 |
| CAT | 54.0 ± 3.6 a | 69.0 ± 3.9 b | 72.3 ± 4.7 b | 75.5 ± 8.1 b | 54.9 ± 3.0 a | 44.3 ± 2.1 a | 0.006 |
| GST | 126 ± 7.1 a | 166 ± 7.9 b | 176 ± 7.8b | 213 ± 14.2 c | 187 ± 14.1 bc | 160 ± 7.6 b | <0.001 |
| GPX | 5393 ± 210 a | 6190 ± 261 b | 6270 ± 174 b | 6040 ± 220 b | 6088 ± 174 b | 5997 ± 124 ab | 0.003 |
| GR | 41.2 ± 2.4 a | 43.8 ± 3.6 ab | 52.1 ± 5.0 bc | 58.9 ± 2.3 c | 52.6 ± 2.2 bc | 47.8 ± 1.7 ab | <0.001 |
| T-GSH | 0.76 ± 0.04 ab | 0.83 ± 0.02 bc | 0.90 ± 0.04 c | 0.83 ± 0.02 bc | 0.76 ± 0.03 ab | 0.72 ± 0.03 a | 0.029 |
| ASA | 261 ± 7.7 a | 277 ± 7.7 ab | 299 ± 11.7 bc | 325 ±11.6 c | 312 ± 6.5 bc | 311 ± 6.1 bc | 0.006 |
| AHR | 218 ± 6.6 a | 259 ± 19.7 ab | 252 ± 18.5 ab | 288 ± 8.5 b | 222 ± 7.8 a | 226 ± 12.0 a | 0.027 |
Values are means ± S.E. of three replicate groups with 12 fish in each group. Values within the same rows having different superscripts are significantly different (p < 0.05).