过渡期奶牛的负能量平衡诱导了牛奶脂质谱的复杂变化
Zhiqian Liu1, Vilnis Ezernieks1, Joanne E Hemsworth1
1Agriculture Victoria Research, AgriBio, 5 Ring Road, Melbourne, VIC 3083, Australia.
Metabolites
|February 26, 2026
概括
奶牛的负能量平衡 (NEB) 显著改变了牛奶脂质的概况. 研究人员确定了九种特定的牛奶脂质作为潜在的生物标志物,以表明牛的能量状态.
科学领域:
- 乳制品科学 乳制品科学
- 代谢学 代谢学 代谢学
- 利皮多米克 (Lipidomics) 是一种消化剂.
背景情况:
- 负能量平衡 (NEB) 在过渡期对奶牛的新陈代谢产生了深远的影响.
- 由于NEB而导致的详细的牛奶脂质组变化尚未完全理解.
- 建立可靠的脂质生物标志物来确定牛的能量状况至关重要.
研究的目的:
- 综合分析乳牛中由NEB引起的乳脂体变化.
- 为了确定潜在的脂质生物标志物,表明NEB.
主要方法:
- 在早期和中期哺乳期之间进行牛奶脂质组成的系统比较.
- 使用气体染色学-火焰电离检测 (GC-FID),水友相互作用液体染色学-质谱学 (HILIC-MS) 和逆相液体染色学-质谱学 (RP-LC-MS).
主要成果:
- NEB显著修改了所有被调查的脂类,包括脂和甘油三.
- 具有de novo和奇链脂肪酸的脂质被降低;具有长链预制脂肪酸的脂质被上调.
- 具体的脂质反应在不同的物种和脂质类别之间有所不同.
结论:
- 九种特定的脂质 (PE 33:1, LacCer 32:1, LacCer 39:1, LacCer 41:1, SM 36:1, SM 36:2, SM 37:1, PEP 38:4, PEP 38:5) 被确定为乳牛中NEB的潜在生物标志物.
- 这些发现有助于了解奶牛的能量代谢和开发诊断工具.
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