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动物和人类母乳样本中的特定物种N-甘氨酸模式

Davide Ret^1,2, Salvatore Alessio Gentile², Johanna Rohrhofer²

¹Research Unit Macromolecular Chemistry, Institute of Applied Synthetic Chemistry, TU Wien, Vienna, Austria.

Frontiers in nutrition

|October 16, 2025

概括

人类母乳具有独特的N-甘氨酸特征,富含N-乙烯基神经胺酸 (Neu5Ac),缺乏非人类的N-甘氨基神经胺酸 (Neu5Gc). 其他哺乳动物的牛奶和婴儿配方奶粉呈现出不同的,特定于物种的糖成分,具有不同的Neu5Gc水平.

科学领域:

生物化学生物化学
格莱科米克斯 (Glycomics) 是一个有趣的药物.
对哺乳动物牛奶成分的比较分析.

背景情况:

牛奶含有蛋白质,脂肪和碳水化合物,包括甘氨酸,它们在生物功能中起着至关重要的作用.
酸是甘氨酸的关键成分,影响其结构和生物活性.
了解牛奶甘氨酸的特征对于婴儿营养和比较生物学至关重要.

研究的目的:

分析和比较来自各种哺乳动物物种的牛奶和婴儿配方奶粉的N-甘氨酸概况.
识别和量化特定的酸,特别是N-乙神经胺酸 (Neu5Ac) 和N-甘神经胺酸 (Neu5Gc).
为了研究不同物种中的素和乳清分数之间的糖组成的差异.

主要方法:

甲基胺被用于稳定末端酸进行分析.
使用染色学技术分配和比较N-糖甘配置文件.
酸含量,包括Neu5Ac和Neu5Gc,在母乳,婴儿配方奶粉和来自牛,马,山羊和绵羊的牛奶中量化.

主要成果:

人类母乳表现出独特的N-甘氨酸配置,其特点是高化和富含Neu5Ac,没有可检测的Neu5Gc.
哺乳动物牛奶的N-甘氨酸档案是特定物种的,具有不同量的化和Neu5Gc;羊奶含有最高的Neu5Gc.
与母乳相比,婴儿配方奶粉的总酸含量降低,含有约7%的Neu5Gc.

结论:

人类母乳与其他哺乳动物的牛奶相比,具有明显的N-甘氨酸特征.
人母乳中缺少Neu5Gc是与其他物种的关键差异化因素.
在乳酪蛋白和乳清分数之间的甘氨酸概况显著差异主要在婴儿配方中观察到,而不是在母乳中观察到.

关键词:

N-乙神经胺酸 (Neu5Ac) 是一种 N-甘氨酸的含量是多少 N-葡萄糖神经胺酸 (Neu5Gc) 的使用牛奶中的糖化.酸是酸的一种.

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