动力分析和粉消化产品成分揭示了安托西亚尼丁结构与胰腺α-氨基酶抑制活性之间的微妙关系
Zhengcao Xiao1,2,3, Ivan Kurtovic1,2,3, Weifeng Chen4
1College of Food Science and Technology, Northwest University, Xi'an, Shaanxi 710069, China.
Journal of agricultural and food chemistry
|February 10, 2025
概括
安西氨酸和安西氨基酸通过抑制α-氨基酶来控制血糖. 在B环上更多的基团增强了抑制,而甲基化影响了活性和机制.
科学领域:
- 生物化学 生物化学
- 药理学 药理学是指药理学的学科.
- 食品科学 食品科学 食品科学
背景情况:
- 聚醇,包括安东素和安东素,以其潜在的健康益处而闻名.
- 餐后高血糖是个重大问题,而α-氨基酶抑制剂提供了一个治疗点.
- 了解这些化合物的结构-活性关系对于开发有效的降糖剂至关重要.
研究的目的:
- 为了研究纯化安东素及其聚糖体,安东素的α-氨酶抑制活性.
- 阐明这些化合物抑制α-氨酶的结构-活性关系.
- 确定抑制的机制和特定化学修饰的作用.
主要方法:
- 从水果来源净化10个安托西亚宁.
- 酸水解以获得6种安东基亚尼丁.
- 使用液体染色学-电子喷雾电离-质谱学/质谱学 (LC-ESI-MS/MS) 识别化合物.
- 用2-chloro-4-nitrophenyl α-maltotrioside进行酶动力学测定.
- 对粉消化产品的分析.
- 分子对接模拟. 分子对接模拟.
主要成果:
- 安东基亚尼丁表现出比安东基亚宁更高的α-氨酶抑制活性.
- 在B环上增加的基团增强了整体抑制和竞争性抑制.
- 较高的基密度促进了短链寡糖体形成的抑制 (DP 2-3).
- 分子对接表明与活性部位残留物的相互作用增加.
- 在3'-OH的甲基化稳定了相互作用,而同时的3'和5'-OH甲基化降低了活性,并改变了由于硬质阻碍而导致的纯竞争的抑制.
结论:
- 安西亚尼丁是α-氨基酶的强有力的抑制剂,其活性受到B环氧化作用的影响.
- 基团的数量和位置以及甲基化模式显著调节抑制功效和机制.
- 这些发现提供了对饮食中的多醇用于管理食后葡萄糖水平的合理设计的见解.
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