Table 4.

Effects of wheat bran supplementation on serum immune parameters of broilers.

Item	CON	AGP	WB	SEM	P-value
Day 21
TNF-α, pg/mL	57.46a	40.53b	45.17b	3.01	0.01
IL-1β, pg/mL	26.23	24.04	22.29	1.07	0.06
IL-6, pg/mL	127.74	124.25	122.34	2.16	0.23
DAO, U/L	23.35a	19.12b	18.93b	0.99	0.01
Endotoxin, EU/mL	1.38a	0.98b	0.96b	0.10	0.01
Day 42
TNF-α, pg/mL	47.47a	43.11a,b	40.08b	1.59	0.02
IL-1β, pg/mL	26.43	25.11	22.20	1.59	0.34
IL-6, pg/mL	136.32	129.34	127.36	2.93	0.11
DAO, U/L	21.66a	18.48b	18.39b	0.81	0.02
Endotoxin, EU/mL	0.97	0.95	0.92	0.03	0.55

^a,bMeans in the same row with different superscripts differ significantly (P < 0.05).

Abbreviations: AGP, CON + 75 mg/kg chlortetracycline (antibiotic growth promoter); CON, antibiotic-free control diet; DAO, diamine oxidase; IL-1β, interleukin-1β; IL-6, interleukin-6; TNF-α, tumor necrosis factor-α; WB, CON + 3% wheat bran.

Values are means, n = 7 per treatment.