Table 6.
Effects of essential oil supplementation on antioxidant enzyme activity and oxidant products of serum in weaned piglets 1.
| Item | CON | AB | EO | SEM | p-Value |
|---|---|---|---|---|---|
| Day 14 | |||||
| Superoxide dismutase (SOD), U/mL | 71.1 b | 75.9 b | 82.0 a | 1.64 | <0.01 |
| Glutathione peroxidase (GPX), U/mL | 703 | 757 | 751 | 22.4 | 0.20 |
| Catalase (CAT), U/mL | 5.31 b | 6.08 ab | 6.65 a | 0.33 | 0.04 |
| Total antioxidant capacity (T-AOC), U/mL | 8.52 b | 9.84 b | 19.64 a | 2.73 | 0.02 |
| Malondialdehyde (MDA), nmol/mg | 11.57 | 7.31 | 8.02 | 1.43 | 0.11 |
| 8-hydroxy deoxyguanosine (8-OHdG), ng/mg | 30.5 a | 25.2 ab | 19.3 b | 2.48 | 0.02 |
| Protein carbonyl, nmol/mg | 1.69 | 1.22 | 1.24 | 0.35 | 0.58 |
| Day 28 | |||||
| Superoxide dismutase (SOD), U/mL | 81.1 | 86.6 | 83.9 | 2.98 | 0.44 |
| Glutathione peroxidase (GPX), U/mL | 709 | 750 | 724 | 29.6 | 0.63 |
| Catalase (CAT), U/mL | 5.39 | 5.83 | 5.20 | 0.43 | 0.58 |
| Total antioxidant capacity (T-AOC), U/mL | 33.5 | 46.0 | 37.6 | 3.63 | 0.07 |
| Malondialdehyde (MDA), nmol/mg | 8.82 a | 4.89 b | 5.87 b | 0.73 | <0.01 |
| 8-hydroxy deoxyguanosine (8-OHdG), ng/mg | 23.0 | 24.4 | 21.4 | 2.78 | 0.74 |
| Protein carbonyl, nmol/mg | 1.23 a | 0.96 ab | 0.46 b | 0.20 | 0.05 |
CON = basal diets; AB = basal diets supplemented with 20 mg/kg colistin sulfate and 40 mg/kg zinc bacitracin; EO = basal diets supplemented with 100 mg/kg essential oil blend. 1 Values are the means of six observations per treatment, and different superscripts within a row indicate a significant difference (p ≤ 0.05).