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Effect Of Glutamine On Antioxidant Capacity And Lipid Peroxidation In The Breast Muscle Of Heat-Stressed Broilers Via Antioxidant Genes And Hsp70 Pathway

文献类型： 外文期刊

作者： Hu, H; Chen, L; Dai, SF; Li, JQ; Bai, X

作者机构：

关键词： Glutamine; Heat Stress; Antioxidant Capacity; Lipid Peroxidation; Hsp70; Antioxidants; Meat Quality; Broiler

期刊名称： ANIMALS

ISSN： 2076-2615

年卷期： 2020 年 10 卷 3 期

页码：

收录情况： JCR（2021版）

摘要： Simple Summary Broilers are heat stress sensitive animals. Heat stress can reduce the meat quality and increase the oxidative stress of broilers. The aim of this study was to investigate the effect of dietary supplementation with Glutamine (Gln) on meat quality, antioxidant capacity, lipid peroxidation, antioxidant genes, and the HSP70 gene and protein expression in broilers exposed to cyclic heat stress. Results showed that Gln improved the meat quality in heat-stressed broilers. In conclusion, our study suggested that dietary Gln supplementation alleviated antioxidant capacity and lipid peroxidation in the breast muscle of heat-stressed broilers by antioxidant genes and the HSP70 pathway. Abstract This study investigated whether Glutamine (Gln) could be used as an additive to improve antioxidant capacity in the breast muscle of heat-stressed broilers. Two hundred and forty 22-day-old Arbor Acres broilers in the G1, G2, G3, and G4 groups (n = 60 each) were housed in a cyclic hot environment and fed the basal diet with 0%, 0.5%, 1.0%, and 1.5% Gln, respectively. Compared with the G1 group, dietary 1.5% Gln increased (p < 0.05) pH and b* values, but decreased (p < 0.05) L* cooking loss, drip loss, and water loss rate in breast meat of heat-stressed broilers. Malondialdehyde levels in the breast muscle were lower (p < 0.05) in 1.0% and 1.5% Gln groups than that of the heat-stress group. Compared with the G1 group, dietary 1.5% Gln increased (p < 0.05) catalase (CAT), glutathione, glutathione peroxidase (GSH-Px,) and total antioxidant capacity in the breast muscle of heat-stressed broilers. Furthermore, the CAT, GSH-Px, HSP70 mRNA expression levels, and HSP70 protein expression levels were increased (p < 0.05) in the G3 and G4 groups compared with the G1 group. In sum, Gln alleviated antioxidant capacity and lipid peroxidation in the breast muscle of heat-stressed broilers through antioxidant genes and HSP70 pathways.

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