The protective effect of procyanidin against LPS-induced acute gut injury by the regulations of oxidative state

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Table 4 Effect of dietary PCA on serum parameters of LPS-induced oxidative stress broilers fed 1 to 21 days age

Items	LPS (−)				LPS (+)				P values
Items	Control	PCA1	PCA2	PCA3	Control	PCA1	PCA2	PCA3	Diet	Stress	Interaction
DAO (U/ml)	16.51 ± 0.14^a	15.42 ± 0.98^a	15.40 ± 0.26^a	15.18 ± 0.37^a	30.52 ± 0.17^c	22.45 ± 0.11^b	20.81 ± 0.10^b	19.34 ± 0.20^b	0.002	0.001	0.020

Data represent means from 6 replicates per treatment
The P values represent the main effect of the diet, the main effect of LPS challenge and the interaction between the dietary treatments and LPS challenge
^a, ^b Least-square mean values (n 6) within a row with unlike superscript letters were significantly different (P < 0.05)
LPS (−) Dietary treatment were abdominal injections sterile saline (0.5 mg/kg body weigh); LPS (+) Dietary treatment were abdominal injections LPS (0.5 mg/kg body weigh); Control Basal diet; PCA1 Basal diet supplemented with 0.05 % PCA; PCA2 Basal diet supplemented with 0.075 % PCA; PCA3 Basal diet supplemented with 0.1 % PCA