在一年的时间里，以干草或青贮饲料为基础的日粮饲养的两个奶牛群的牛奶脂质组的变化。

Variations in the milk lipidomes of two dairy cow herds fed hay- or silage-based diets over a full year.

机构信息

Institute of Bioanalytical Chemistry, Faculty of Chemistry and Mineralogy, Universität Leipzig, Leipzig, Germany; Center for Biotechnology and Biomedicine, Universität Leipzig, Leipzig, Germany.

出版信息

Food Chem. 2022 Oct 1;390:133091. doi: 10.1016/j.foodchem.2022.133091. Epub 2022 Apr 26.

DOI:10.1016/j.foodchem.2022.133091

PMID:35533639

Abstract

Bovine milk plays an important role in human nutrition and is one of the main products of dairy industry. Its composition changes in response to various factors including forage, which are rapidly reflected by the milk lipidome. Most cows receive a silage-based diet despite a recent trend towards more traditional husbandry relying on hay-feeding. Here, changes in the lipidome upon different animal diets were addressed by studying milk of cows from two different feeding regimes and associated seasonal variations over one year. Extracted lipids were analyzed by reversed-phase liquid chromatography coupled on-line to high resolution mass spectrometry. Overall, 1302 lipid molecular species were identified including 1038 triacylglycerides (∼80%), whereas the remaining 20% were represented by a variety of species from twelve lipid classes. A semi-absolute quantitation of 264 lipid species showed diet- and season-induced variations in the milk lipidome with many odd chain triacylglycerides upregulated in hay milk.

摘要

牛奶在人类营养中起着重要作用，是乳制品行业的主要产品之一。其成分会根据各种因素发生变化，包括饲料，这些变化会迅速反映在乳脂质组中。尽管最近有向依赖干草喂养的传统养殖方式转变的趋势，但大多数奶牛仍以青贮饲料为食。在这里，通过研究来自两种不同饲养方式的奶牛的牛奶以及一年中与季节相关的变化，研究了不同动物饮食对脂质组的影响。通过反相液相色谱与高分辨质谱在线联用分析提取的脂质。总的来说，鉴定出了 1302 种脂质分子物种，包括 1038 种三酰基甘油（约 80%），而其余 20%由来自 12 个脂质类别的各种物种组成。对 264 种脂质物种的半绝对定量显示，饮食和季节变化会引起乳脂质组的变化，其中许多奇数链三酰基甘油在干草奶中上调。