乳头保护胆对乳母牛脂肪消化能力和淋巴代谢的作用
Usman Arshad1, Roney Zimpel1, Ali Husnain1
1Department of Animal Sciences, DH Barron Reproductive and Perinatal Biology Research Program, University of Florida, Gainesville, USA.
Journal of animal physiology and animal nutrition
|February 21, 2024
概括
补充限制料的奶牛与皮保护胆 (RPC) 改善了脂肪消化能力和改变了淋巴代谢组. 这表明RPC对经历负能量平衡的奶牛的营养利用和代谢途径产生了积极的影响.
科学领域:
- 动物的营养和新陈代谢
- 动物生理学 动物生理学
- 生物化学 生化学
背景情况:
- 胆对于脂质新陈代谢至关重要,可以补充作为皮保护胆 (RPC) 来绕过皮降解.
- 孕牛的料限制可能会导致负能量平衡,影响代谢健康和营养利用.
- 了解不同RPC来源对脂肪消化能力和淋巴代谢组的影响对于优化奶牛营养至关重要.
研究的目的:
- 评估补充两种不同来源的反保护胆 (RPC) 对限制料的奶牛脂肪消化能力的影响.
- 为了研究RPC补充剂对孕妇,受限料奶牛的乳腺上淋巴代谢组的影响.
- 为了比较低脂涂层RPC与高脂涂层RPC原型的疗效.
主要方法:
- 33只怀孕的,不哺乳的荷尔斯坦奶牛被分配给控制 (CON),低脂RPC (L25.8) 或高脂RPC (H25.8) 治疗.
- 牛的料限制为9天的42%的能量需求,然后在第9天接受和脂肪酸挑战.
- 便和血液样本被采集了24小时,SFA养后6小时的乳腺上淋巴被采样,用于代谢分析.
主要成果:
- 补充RPC显著增加了脂肪消化能力 (80.4%至86.0%),并降低了血清哈普托格洛宾度,无论RPC来源如何.
- 在SFA养后,RPC增加了血清三糖度,高脂源的增加趋势更大.
- 补充RPC增加了淋巴三糖醇,胆和受影响的分析物,这些分析物参与了氨基酸代谢和脂生物合成.
结论:
- 保护的胆补充剂提高了脂肪消化能力,并调节了限制料的奶牛的淋巴代谢组,表明改善了脂质代谢.
- RPC (脂质涂层) 的来源可能会影响三糖醇的反应,这表明可能有量身定制的补充策略.
- 在负营养平衡下,RPC对营养利用和牛的整体健康至关重要的代谢途径产生积极影响.
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