. 2018 Dec 6;9:2744. doi: 10.3389/fimmu.2018.02744

Table 3.

Effect of L-trp supplement on the serum antioxidant capacity in E. sinensis at 1, 7, and 14 d.

Item	Sample time	Diet # A	Diet # B	Diet # C	Diet # D
SOD activity (U/ml)	1 d	82.90 ± 7.08	79.54 ± 8.16	81.84 ± 6.03	77.24 ± 4.89
	7 d	85.66 ± 6.55	86.78 ± 3.78	83.43 ± 7.58	84.54 ± 8.68
	14 d	88.72 ± 4.77	95.79 ± 4.45	89.61 ± 10.98	97.20 ± 2.50
GSH content (mg/L)	1 d	1.06 ± 0.27	1.20 ± 0.34	1.23 ± 0.37	1.25 ± 0.50
	7 d	0.98 ± 0.28^a	1.17 ± 0.38^a	1.85 ± 0.41^b	1.44 ± 0.42^ab
	14 d	1.28 ± 0.39^a	1.47 ± 0.37^ab	1.44 ± 0.27^ab	1.87 ± 0.22^b
GSH-Px activity (μmol/L)	1 d	424.96 ± 24.63	414.52 ± 43.04	441.39 ± 28.15	411.91 ± 55.13
	7 d	408.78 ± 65.04^a	413.74 ± 47.67^a	441.91 ± 28.97^a	535.30 ± 26.00^b
	14 d	371.22 ± 12.99	387.91 ± 62.76	433.30 ± 35.83	387.39 ± 88.46
MDA content (nmol/ml)	1 d	12.26 ± 2.26	12.64 ± 2.93	12.03 ± 2.64	11.31 ± 2.67
	7 d	12.34 ± 2.47	11.46 ± 2.19	9.76 ± 1.21	11.05 ± 2.02
	14 d	11.58 ± 2.69^a	11.05 ± 2.18^ab	7.98 ± 1.88^b	7.34 ± 1.69^b

The values are expressed as the means ± SD (n = 6). SOD: superoxide dismutase; GSH, glutathione; GSH-Px, glutathione peroxidase; MDA, malondialdehyde. Different letters represent the significant differences between different groups at the same time (P < 0.05).