来自Litchi chinensis Sonn的一种多糖的结构特征和低血糖活性. () 周骨
Yucui Lu1, Xianmei Lnong2, Yuanhui Mao2
1College of Pharmaceutical Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China.
Food chemistry
|August 21, 2025
概括
利奇皮糖多糖LPPs-1有效抑制参与碳水化合物消化的主要酶,表明其作为糖尿病治疗的天然降糖剂的潜力.
科学领域:
- 食品科学
- 生物化学
- 营养药物
背景情况:
- 子 (Litchi chinensis Sonn.) 其他 皮是生物活性多糖的丰富来源.
- 这些多糖的结构-生物活性关系仍未得到充分研究.
- 提升利奇的价值可以提供可持续的功能性食品成分.
研究的目的:
- 从利奇花周骨中分离和描述一个同质的多糖体 (LPPs-1).
- 阐明LPPs-1的结构,包括其单糖化合物组成和糖链接.
- 评估LPPs-1对碳水化合物消化酶的酶抑制潜力.
主要方法:
- 从利奇中分离和净化多糖.
- 使用重量平均分子重量和多分散度指数的鉴定.
- 单糖组合分析和核磁共振 (NMR) 光谱用于结构阐明.
- 在体外对α-氨基酶和α-葡萄糖酶进行酶抑制测定.
主要成果:
- 一种同质的多糖体LPPs-1被成功分离出来,其分子量为38. 97kDa.
- LPPs-1由九种不同的单糖组成,其中阿拉伯糖,银酸和银糖是主要成分.
- 核磁共振分析揭示了多糖骨干中的特定甘油酸链接.
- LPPs-1 显示出强大的,可逆的α- 氨基酶 (IC50 = 0. 16 mg/ ml) 和α- 葡萄糖酶 (IC50 = 0. 24 mg/ ml) 的抑制.
结论:
- LPPs-1具有独特的结构,来源于皮.
- 双重抑制α- 氨基酶和α- 葡萄糖酶凸显了LPPs- 1作为低血糖剂的潜力.
- 利奇的多糖体显示出对糖尿病治疗的功能性食品成分的前景.
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