多组织转录组学证明了肉中 metionin 缺乏的系统生理学
M Klünemann1, L F Romero2, M Acman2
1Animal Nutrition Research, Evonik Operations GmbH, Hanau Germany.
Animal : an international journal of animal bioscience
|April 19, 2024
概括
氨酸缺乏通过组织特异性的分子机制损害肉生长,氧化应激起着关键作用. 年轻的鸟类更敏感,DL-氨酸是启动阶段的首选来源.
科学领域:
- 动物科学动物科学
- 分子生物学分子生物学
- 营养生物化学 营养生物化学
背景情况:
- 氨酸 (Met) 补充对于肉的营养至关重要,但它在系统生理学中的确切作用以及不同Met来源的影响需要进一步阐明.
- 了解甲缺乏症和各种甲来源的作用模式对于优化肉的性能和健康至关重要.
研究的目的:
- 评估使用不同来源 (DL-Met,L-Met,MHA-FA) 的肉甲缺乏和补充的作用模式.
- 使用生物通路激活建模,预测在阴,肝脏和乳腺组织中差异表达基因 (DEG) 的表型影响.
主要方法:
- 从不同年龄 (10,21,34/35天) 的肉身上获得的阴,肝脏和乳腺组织的转录组分析.
- 对三项实验的综合分析,以评估基因表达和通路激活.
- 特定基因表达和性能指标之间的相关性分析.
主要成果:
- 氨酸缺乏减少了体重,料摄入量和乳房产量,同时增加了料转化率.
- 甲氨酸缺乏对肝脏和乳腺的基因表达产生了最显著的影响,影响了与蛋白质循环,肠道完整性,免疫力,脂质代谢,氧化应激和神经元功能相关的途径.
- 年轻的鸟类对 metionin 缺乏更为敏感,DL-Met 在初始阶段被确定为比 L-Met 和 MHA-FA 更优惠的来源.
结论:
- 由于 metionin 缺乏而导致的肉生长障碍源于组织特异性的分子机制,氧化应激是关键的系统因素.
- 根据年龄对氨酸缺乏的敏感性强调了量身定制的营养策略的重要性.
- 与L-Met和MHA-FA相比,DL-氨酸在年轻 brojlers中表现出更高的疗效,这表明来源特定的益处.
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