Effects of Amino Acid Supplementation to a Low-Protein Diet on the Growth Performance and Protein Metabolism-related Factors in Broiler Chicks.

IF 1.8 4区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE Journal of Poultry Science Pub Date : 2024-05-09 eCollection Date: 2024-01-01 DOI:10.2141/jpsa.2024014
Asmaa S El-Far, Maho Kamiya, Takaoki Saneyasu, Kazuhisa Honda
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Abstract

A low-protein (LP) diet may alleviate the environmental impact of chicken meat production by reducing nitrogen excretion and ammonia emissions. Thus, this study investigated the effect of a 15% reduced protein diet with or without amino acid (AA) supplementation on the growth performance of broiler chicks from 10 to 35 days of age and the underlying mechanism for loss of skeletal muscle mass. Thirty-six male broiler chicks were allocated to three experimental groups based on body weight: control, LP, and essential AA-supplemented LP (LP+AA). The body weight gain, feed conversion ratio, and weight of breast muscles and legs significantly decreased only in the LP group at the end of the feeding period. Plasma uric acid levels were significantly lower in the LP+AA group than those of the other groups. In the LP group, mRNA levels of microtubule-associated protein 1 light chain 3 isoform B were significantly higher in the pectoralis major, whereas those of atrogin-1, muscle RING-finger protein-1, and myoblast determination protein 1 were significantly higher in the biceps femoris compared to those in the control group. There were no significant differences in insulin-like growth factor 1 mRNA levels in the liver or skeletal muscle between groups. These findings suggested that supplementation with essential AAs ameliorated the impaired effects of an LP diet on growth performance in broiler chicks, and that the transcriptional changes in proteolytic genes in skeletal muscles might be related to the impaired effects of the LP diet.

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低蛋白日粮中添加氨基酸对肉鸡生长性能和蛋白质代谢相关因子的影响
低蛋白(LP)日粮可减少氮的排泄和氨的排放,从而减轻鸡肉生产对环境的影响。因此,本研究调查了添加或不添加氨基酸(AA)的 15%低蛋白日粮对 10 至 35 日龄肉用仔鸡生长性能的影响,以及骨骼肌质量损失的内在机制。根据体重将 36 只雄性肉鸡分为三个实验组:对照组、LP 组和添加必需 AA 的 LP 组(LP+AA)。在饲养期结束时,只有 LP 组的增重、饲料转化率、胸肌和腿部重量明显下降。LP+AA组的血浆尿酸水平明显低于其他组。与对照组相比,LP组胸大肌的微管相关蛋白1轻链3同工酶B的mRNA水平明显升高,而股二头肌的atrogin-1、肌肉RING-finger蛋白-1和成肌细胞决定蛋白1的mRNA水平明显升高。肝脏和骨骼肌中的胰岛素样生长因子 1 mRNA 水平在不同组间没有明显差异。这些研究结果表明,补充必需 AAs 可改善 LP 日粮对肉鸡生长性能的影响,而骨骼肌中蛋白水解基因的转录变化可能与 LP 日粮的影响有关。
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来源期刊
Journal of Poultry Science
Journal of Poultry Science AGRICULTURE, DAIRY & ANIMAL SCIENCE-
CiteScore
2.80
自引率
13.30%
发文量
26
审稿时长
12 months
期刊介绍: The Journal of Poultry Science will publish original reports and reviews which either make an original contribution to fundamental science or are of obvious application to the industry. Subjects which are covered include: breeding and genetics, nutrition and feeds, physiology, reproduction, immunology, behavior, environmental science, management and housing welfare, processing and products, and health in poultry. Submission of original articles to the Journal is open to all poultry researchers. The review articles are invited papers written by international outstanding researchers. Articles will be published in English, American style.
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