Table 7.

Effects of essential oil supplementation on antioxidant enzyme activity and oxidant products of intestine mucosa and liver in weaned piglets ¹.

Item	CON	AB	EO	SEM	p-Value
Jejunum mucosa
Superoxide dismutase (SOD), U/mL	642 b	820 ab	964 a	57.7	0.01
Glutathione peroxidase (GPX), U/mL	1024 b	1260 a	1381 a	65.2	0.01
Catalase (CAT), U/mL	86.0	83.9	82.1	13.6	0.98
Total antioxidant capacity (T-AOC), U/mL	115 b	124 b	197 a	17.2	0.02
Malondialdehyde (MDA), nmol/mg	4.48	5.70	6.20	1.23	0.61
8-hydroxy deoxyguanosine (8-OHdG), ng/mg	47.7	41.4	49.4	5.63	0.58
Protein carbonyl, nmol/mg	50.3	39.9	48.9	2.96	0.07
Ileum mucosa
Superoxide dismutase (SOD), U/mL	737	784	927	55.7	0.09
Glutathione peroxidase (GPX), U/mL	1283	1311	1440	89.1	0.45
Catalase (CAT), U/mL	48.3	28.4	36.9	9.51	0.37
Total antioxidant capacity (T-AOC), U/mL	133	152	172	16.0	0.27
Malondialdehyde, nmol/mg	11.18	5.84	9.69	1.54	0.09
8-hydroxy deoxyguanosine (8-OHdG), ng/mg	91.5	97.3	98.4	9.37	0.86
Protein carbonyl, nmol/mg	66.3	70.1	69.4	5.37	0.87
Liver
Superoxide dismutase (SOD), U/mL	102	118	121	9.17	0.31
Glutathione peroxidase (GPX), U/mL	552b	648a	637a	24.1	0.05
Catalase (CAT), U/mL	18.8	24.3	22.8	3.99	0.62
Total antioxidant capacity (T-AOC), U/mL	76.8	87.9	91.0	9.97	0.59
Malondialdehyde (MDA), nmol/mg	8.18	5.59	7.15	0.91	0.18
8-hydroxy deoxyguanosine (8-OHdG), ng/mg	6.93	6.00	7.60	0.92	0.49
Protein carbonyl, nmol/mg	8.80	5.61	6.94	1.16	0.21

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).