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

Table 5 Effects of dietary tryptophan levels and diquat injection on tryptophan 2,3-dioxygenase activity in the liver of the weaned piglets

Item	- diquat			+ diquat			SEM	P
	Trp 0.18%	Trp 0.30%	Trp 0.45%	Trp 0.18%	Trp 0.30%	Trp 0.45%		Trp	diquat	Trp × diquat
TDO activity, nmol/mg protein·h	2.85^c	3.24^b	3.34^b	3.07^bc	3.72^a	3.46^ab	0.17	< 0.05	0.07	< 0.05

+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%; TDO, tryptophan 2,3-dioxygenase.
^{a, b, c}Mean values with unlike superscript letters were significantly different (P < 0.05).
(Mean values with their pooled standard errors, n = 6).

ISSN: 2049-1891