Correction to: The effect of dietary tryptophan levels on oxidative stress of liver induced by diquat in weaned piglets

Table 4 Effects of dietary tryptophan levels and diquat injection on the activities of antioxidant enzymes and the malondialdehyde concentration in the plasma and liver of the weaned piglets

Item	- diquat			+ diquat			SEM	P
Item	Trp 0.18%	Trp 0.30%	Trp 0.45%	Trp 0.18%	Trp 0.30%	Trp 0.45%	SEM	Trp	diquat	Trp × diquat
Plasma
SOD, U/mL	131.55	130.60	131.37	121.26	135.07	129.65	7.13	0.71	0.69	0.64
GPx, U/mL	698.32^b	811.76^a	810.08^a	665.55^b	768.24^ab	748.07^ab	38.60	0.62	0.08	0.66
MDA, nmol/mL	2.28	2.48	2.43	2.41	2.28	2.31	0.26	0.89	0.60	0.97
Liver
SOD, U/mL	564.43^a	579.77^a	595.80^a	469.14^b	516.04^ab	527.69^ab	31.64	0.74	< 0.05	0.09
GPx, U/mL	95.63^a	95.71^a	95.56^a	76.04^b	90.03^a	99.44^a	5.20	0.18	< 0.05	0.05
MDA, nmol/mL	1.60^a	1.27^b	1.56^a	1.74^a	1.44^ab	1.59^a	0.14	0.23	0.09	0.06

+ diquat, intraperitoneal injection diquat; − diquat, intraperitoneal injection of sterile 0.9% NaCl solution; Trp 0.18%, dietary tryptophan level 0.18%; Trp 0.30%, dietary tryptophan level 0.30%; Trp 0.45%, dietary tryptophan level 0.45%; SOD, superoxide dismutase; GPx, Glutathione peroxidase, MDA, Malondialdehyde. ^{a, b, c}Mean values with unlike superscript letters were significantly different (P < 0.05). (Mean values with their pooled standard errors, n = 5 or 6)

ISSN: 2049-1891