Table 4.

Effects of dietary squalene supplementation on the antioxidant status in the plasma and liver of diquat-challenged broilers.

Items	Treatments			SEM1	P-value
	CON	DQ	DQ + SQ
Plasma
SOD, U/mL	246.05a	155.34b	191.79a,b	12.70	0.005
GPX, U/mL	462.48c	683.34a	591.30b	24.88	<0.001
CAT, U/mL	1.11	1.03	1.08	0.13	0.972
MDA, nmol/mL	1.00b	1.63a	1.20a,b	0.10	0.012
GSH, mg/L	10.07a,b	7.09b	14.20a	1.02	0.007
Liver
SOD, U/mg protein	76.60	72.72	76.96	0.99	0.156
GPX, U/mg protein	37.19b	46.89a	41.30a,b	1.64	0.041
CAT, U/mg protein	5.21	5.27	5.43	0.22	0.925
MDA, nmol/mg protein	0.59b	0.85a	0.73a,b	0.04	0.015
GSH, mg/g protein	8.60a	5.82b	8.24a	0.43	0.007

^a,b,cMeans within a row with different superscripts are different at P <0.05.

Abbreviations: CAT, catalase; CON, nonchallenged broilers fed with a basal diet; DQ, diquat-challenged broilers fed with a basal diet; DQ + SQ, diquat-challenged broilers fed with a basal diet supplemented with 1.0 g/kg of squalene; GPX, glutathione peroxidase; GSH, reduced glutathione; MDA, malondialdehyde; SOD, superoxide dismutase.

¹n = 6.