天然产物研究与开发 ›› 2012, Vol. 23 ›› Issue (09): 1253-.doi: A

• 开发研究 • 上一篇    下一篇

石榴皮多酚提取物及纯化物对α-葡萄糖苷酶的抑制作用研究

张海均,贾冬英*,孙 慧,姚 开   

  1. 四川大学轻纺与食品学院,成都 610065
  • 出版日期:2012-09-29 发布日期:2013-01-06
  • 基金资助:

    四川省科技厅应用基础研究项目(06J13-084)

Inhibitory Effect of Polyphenol Extract from Pomegranate Peel and Its Purified Fractions on α-glucosidase Activity

ZHANG Hai-jun, JIA Dong-ying*, SUN Hui, YAO Kai   

  1. College of Light Industry & Food Science, Sichuan University, Chengdu 610065, China
  • Online:2012-09-29 Published:2013-01-06

摘要: 采用紫外分光光度法研究了石榴皮多酚提取物及其2种纯化物(P-1 和P-2)对α-葡萄糖苷酶体外抑制作用以及纯化物对该酶的抑制作用类型。结果显示,石榴皮多酚提取物和纯化物对α-葡萄糖苷酶活性均表现出较强的抑制作用,且其作用大小与浓度呈明显的剂量-效应关系;3种多酚样品中,纯化物P-2的抑酶活性最强,纯化物P-1次之,提取物最弱,它们对α-葡萄糖苷酶的半数抑制浓度(IC50,mg/mL)分别为0.045、0.185和0.278。石榴皮多酚纯化物P-2对α-葡萄糖苷酶抑制作用类型为反竞争性抑制;浓度为0.01 mg/mL时该纯化物对α-葡萄糖苷酶的抑制常数Ki为1.22 μg/mL。

关键词: 石榴皮;多酚;&alpha, -葡萄糖苷酶;抑制作用;抑制类型

Abstract: This paper studied the inhibitory effect of a polyphenol extract from pomegranate peel and its two purified fractions (P-1 and P-2) on the activity of α-glucosidase by applying UV spectrophotometry. In addition, the inhibition type of one purified fraction was determined. The extract and the purified fractions showed a dose-dependent inhibitory effect on α-glucosidase activity, of which P-2 demonstrated the strongest inhibition followed by P-1 and the extract, their 50% inhibition concentrations (mg/mL) on the enzyme being 0.045, 0.185 and 0.278, respectively. The purified fraction P-2 exhibited an anti-competitive inhibitory effect on α-glucosidase and its inhibition constant was 1.22 μg/mL at 0.01 mg/mL.

Key words: Pomegranate peel, polyphenols, α-glucosidase, inhibitory effect, inhibitory type

中图分类号: 

O629.9