. 2020 Dec 2;7:601336. doi: 10.3389/fvets.2020.601336

Table 3.

Effect of dietary supplementation with graded levels of algae-derived polysaccharides (ADP) on antioxidant status of serum and liver in broiler chickens.

Items	Dietary ADP levels (mg/kg)						SEM	p-value
	0	1,000	2,500	4,000	5,500	7,000		Linear	Quadratic
DAY 21
SERUM
T-SOD, U/ml	390.21	470.68	456.96	490.29	434.79	478.27	68.62	0.373	0.738
GSH-Px, U/0.1 ml	693.86	796.49	741.75	738.25	766.67	780.70	51.98	0.928	0.427
CAT, U/ml	6.71^a	9.27^a,b	10.22^b	8.17^a,b	8.11^a,b	7.75^a,b	1.01	0.265	0.045
MDA, nmol/ml	4.78^a	3.11^b	3.15^b	3.20^b	3.44^b	3.77^a,b	0.41	0.029	0.055
LIVER
T-SOD, U/mg protein	262.08^a	301.61^a,b	330.94^b	276.49^a,b	314.17^b	315.98^b	17.05	0.364	0.020
GSH-Px, U/mg protein	31.31	32.93	40.73	34.57	43.30	38.19	7.65	0.619	0.622
CAT, U/mg protein	6.73	7.12	8.50	7.82	7.67	5.37	1.98	0.611	0.792
MDA, nmol/mg protein	0.79^a	0.42^b	0.46^b	0.41^b	0.46^b	0.48^b	0.060	0.002	0.024
DAY 35
SERUM
T-SOD, U/ml	449.24	556.39	549.33	582.66	527.16	570.64	62.74	0.191	0.569
GSH-Px, U/0.1 ml	607.62^a	723.58^b	662.18^a,b	645.34^a,b	693.76^a,b	641.13^a,b	34.81	0.746	0.086
CAT, U/ml	7.31^a	11.54^b	11.49^b	9.77^b	10.05^b	10.00^b	0.77	0.059	0.003
MDA, nmol/ml	5.56^a	4.25^b	4.23^b	4.34^b	4.58^a,b	4.56^a,b	0.34	0.035	0.058
LIVER
T-SOD, U/mg protein	286.57^a	339.43^b	342.09^b	357.65^b	355.25^b	357.13^b	11.24	0.002	0.128
GSH-Px, U/mg protein	39.27	46.90	54.70	51.86	53.93	48.82	5.80	0.110	0.389
CAT, U/mg protein	6.48	7.17	7.89	5.87	7.72	5.08	1.40	0.863	0.354
MDA, nmol/mg protein	1.17^a	0.86^b	0.89^b	0.85^b	0.89^b	0.81^b	0.05	0.001	0.031

T-SOD, total superoxide dismutase; GSH-Px, glutathione peroxidase; CAT, catalase; MDA, malondialdehyde.

SEM, standard error of the mean.

^a,b

Means in the same row with different superscripts differ (P < 0.05).