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Dynamic Temporal Variations in Bovine Lactoferrin Glycan Structures.
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2020-01-06 , DOI: 10.1021/acs.jafc.9b06762
Rivca L Valk-Weeber 1 , Talitha Eshuis-de Ruiter 2 , Lubbert Dijkhuizen 1 , Sander S van Leeuwen 1
Affiliation  

It has been reported previously that glycosylation of bovine lactoferrin changes over time. A detailed structural overview of these changes over the whole course of lactation, including predry period milk, is lacking. In this study, a high-throughput analysis method was applied to the glycoprofile of lactoferrin isolated from colostrum, mature, and predry period mature milk, which was analyzed over two subsequent lactation cycles for 8 cows from diverse genetic backgrounds. In addition, comparisons are made with commercial bovine lactoferrin samples. During the first 72 h, dynamic changes in lactoferrin glycosylation occurred. Shifts in the oligomannose distribution and the number of sialylated and fucosylated glycans were observed. In some cows, we observed (α2,3)-linked sialic acid in the earliest colostrum samples. The glycoprofiles appeared stable from 1 month after delivery, as well as between cows. In addition, the glycosylation profiles of commercial lactoferrins isolated from pooled mature milk were stable over the year. Lactoferrin glycosylation in the predry period resembles colostrum lactoferrin. The variations in lactoferrin glycosylation profiles, lactoferrin concentrations, and other milk parameters provide detailed information that potentially assists in unraveling the functions and biosynthesis regulation of lactoferrin glycosylation.

中文翻译:

牛乳铁蛋白聚糖结构的动态时间变化。

先前已有报道,牛乳铁蛋白的糖基化随时间变化。缺乏对整个泌乳过程中这些变化的详细结构概述,包括预干燥期的牛奶。在这项研究中,高通量分析方法应用于分离自初乳,成熟和预干燥期的成熟乳中的乳铁蛋白的糖谱,并在随后的两个泌乳周期内对来自不同遗传背景的8头奶牛进行了分析。此外,与市售牛乳铁蛋白样品进行了比较。在最初的72小时内,乳铁蛋白糖基化发生了动态变化。观察到低聚甘露糖分布的变化以及唾液酸化和岩藻糖基化的聚糖的数量。在某些奶牛中,我们在最早的初乳样品中观察到(α2,3)-连接的唾液酸。从分娩后的1个月开始,以及在母牛之间,糖谱表现出稳定。此外,从合并的成熟牛奶中分离出的商业乳铁蛋白的糖基化曲线在过去一年中保持稳定。乳铁蛋白在预干燥期的糖基化类似于初乳乳铁蛋白。乳铁蛋白糖基化概况,乳铁蛋白浓度和其他牛奶参数的变化提供了详细的信息,这些信息可能有助于阐明乳铁蛋白糖基化的功能和生物合成调节。
更新日期:2020-01-07
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