Ameliorative Effect of Dietary Glutamine on Antioxidant Capacity of Broiler Chicks During Starter Phase Under Cold Stress
Ameliorative Effect of Dietary Glutamine on Antioxidant Capacity of Broiler Chicks During Starter Phase Under Cold Stress
Wenfang Lou1,2, Wenhao Wu1, Haoneng Guo1,2, Shuangshuang Xiao3,
Rifat Ullah Khan4, Xianhua Zhang 1, Guanhong Li2 and Sifa Dai 1*
ABSTRACT
This study investigated the effect of glutamine (Gln) on antioxidant capacity of cold-stressed chicks. A total of 192 1-day-old Arbor Acres (AA) broilers were divided into 4 groups: group I was fed basic diet, groups II, III, and IV were fed with addition of 1.0%, 1.5%, and 2.0% Gln. The house temperature was maintained at 25 ± 2 ℃. Compared with group I, on day 7, the activities of catalase (CAT) and glutathione peroxidase (GSH-PX) in serum and jejunum, GSH-Px in duodenum of group II, the CAT and GSH-Px activities in ileum of group III, the GSH-PX and total antioxidant capacity (T-AOC) activities in jejunum in group IV were increased (P < 0.05). The malonic dialdehyde (MDA) content in serum was decreased (P < 0.05). On day 14, the jejunum CAT and superoxide dismutase (SOD) activities in group II were increased (P < 0.05), and the serum MDA content was reduced (P < 0.05). CAT activity of jejunum and ileum, and GSH-PX activity of serum and jejunum were increased in group III (P < 0.05). The jejunum GSH-PX activity was increased in group IV (P < 0.05). The experiment confirmed that adding Gln to the diet can improve the antioxidant capacity of cold-stressed chicks.
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