Table 8.

Effect of dietary mangosteen peel preparations on oxidative stress markers in serum, liver, and thigh meats of broiler chickens¹.

Item2	CON3	MspP	MspE		SEM	P-value
			0.1%	0.05%
Serum samples
GSH-Px activity, U/L	435.7b	442.2b	541.4a	524.7ab	24.964	0.039
SOD activity, U/L	0.0985	0.0981	0.0986	0.0994	0.001	0.733
CAT, U/mL	5.04b	10.74ab	13.12ab	17.84a	2.146	0.008
MDA, µM	32.97a	18.81b	15.71b	19.73b	1.804	<.0001
TAC, mM	0.854	1.030	0.958	0.902	0.050	0.105
Liver samples
GSH-Px activity, U/mg of protein	93.7ab	88.1b	96.6ab	101.9a	2.867	0.039
SOD activity, U/mg of protein	0.119	0.120	0.117	0.121	0.001	0.639
CAT, U/mg of protein	87.3b	97.0ab	101.2ab	119.6a	6.878	0.050
MDA, nmol/mg of protein	1.205	1.053	0.961	1.094	0.057	0.052
TAC, nmol/mg of protein	68.29	73.85	69.91	71.80	1.491	0.088
Thigh meat samples
GSH-Px activity, U/mg of protein	5.064	5.706	5.794	5.383	0.588	0.830
SOD activity, U/mg of protein	0.0067	0.0072	0.0070	0.0078	0.0003	0.216
CAT, U/mg of protein	5.714b	9.600a	10.115a	7.441ab	0.867	0.010
MDA, nmol/mg of protein	1.890	1.419	1.247	1.402	0.204	0.168
TAC, nmol/mg of protein	33.37	35.47	39.33	39.08	1.735	0.095

¹Values are least squares means representing 8 observations.

²GSH-Px, glutathione peroxidase; SOD, superoxide dismutase; CAT, catalase; MDA, malondialdehyde; TAC, total antioxidant capacity.

³CON, control diet; MspP, 2% mangosteen peel powder; 0.1% MspE, 0.1% mangosteen peel extract; 0.05% MspE, 0.05% mangosteen peel extract; SEM, standard errors of the means.