饮食中补充L-氨酸可以改善牛发酵参数和表皮细胞的发育,在肥的安格斯牛肉牛中
Jishan An1,2, Yu Ge1,2, Huitian He1,2
1College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan, 410128, People's Republic of China.
Journal of animal science and biotechnology
|April 24, 2025
概括
在肉牛的饮食中补充L-氨酸,改善了乳头发酵和上皮的发育. 这种必不可少的氨基酸积极影响了挥发性脂肪酸的产生和与牛的营养吸收相关的基因表达.
科学领域:
- 动物科学 动物科学
- 类动物营养 类动物营养
- 胃肠道生理学 胃肠道生理学
背景情况:
- 氨酸 (Leu) 是一种必不可少的氨基酸,对动物的蛋白质合成和代谢调节至关重要.
- 了解食中的L-氨酸对小功能的影响对于优化肉牛生产和健康至关重要.
研究的目的:
- 研究L-氨酸补充剂对牛肉发酵,上皮细胞发育,氨基酸概况,细菌群落和肉牛中的代谢物的影响.
- 确定L-氨酸如何影响小牛体内的关键生理和生化过程.
主要方法:
- 24只安格斯牛肉公牛被分配给基本饮食或基本饮食补充L-氨酸120天.
- 分析了乳液发酵参数,挥发性脂肪酸 (VFA),氨-N,微生物原蛋白 (MCP),氨基酸组成,乳液表皮形态,基因表达,细菌群落和代谢物.
主要成果:
- 氨酸增加了总VFAs,酸盐,异酸盐和分支链VFAs (BCVFAs),同时倾向于增加酸盐和减少氨酸-N.
- 补充剂增加了类氨酸,氨酸和氨酸的粉度,并增加了层和皮表皮的基底层的厚度.
- 参与紧结蛋白和VFA吸收/代谢的L-氨酸升高调节基因,与牛肉异酸和BCVFA度正相关. 细菌生物标志物和代谢物被丰富了氨基酸和辅因子/维生素代谢途径.
结论:
- 食补充L-氨酸可以有效调节牛肉类牛的反发酵参数和模式.
- 氨酸改善了皮表皮形态,并增强了对VFA吸收和代谢至关重要的基因的表达.
- 这些发现突显了L-氨酸作为营养工具的潜力,以优化牛肉牛的功能和性能.
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