期刊
JOURNAL OF FUNCTIONAL FOODS
卷 28, 期 -, 页码 306-313出版社
ELSEVIER
DOI: 10.1016/j.jff.2016.10.033
关键词
Rb2; alpha-Glucosidase; alpha-Amylase; Glucose metabolism; AMPK
资金
- Construction Project of Top University at Fujian Agriculture and Forestry University of China [612014042, 612014043]
- Major Projects of Science and Technology of Fujian Province [2014NZ0002-1]
- scientific research project for young and middle-aged teachers of Fujian province
Five ginsenosides were evaluated as alpha-glucosidase and alpha-amylase inhibitors by enzymatic kinetics analysis, compared with the market diabetes healer, acarbose. The results indicated that Rb2 and Rd exhibited strong alpha-glucosidase and alpha-amylase inhibition. Concentration of Rb2 and Rd to inhibit 50% of aglucosidase (IC50) were 32.2 and 38.8 mu M, IC50 for alpha-amylase were 128 and 167.4 mu M, respectively. The enzyme kinetic studies revealed that, in the presence of the most potent alpha-glucosidase inhibitors, Rb2 and Rd, the Michaelis-Menton constant (K-m) remained constant but the maximal velocity (V-max) decreased, revealing a non-competitive type of inhibition. Moreover, Rb2 and Rd were shown to be reversible inhibitors of yeast alpha-glucosidase with Ki values of 19.4 and 24.5 mu M, respectively. Moreover, we investigated the effects of Rb2 on metabolism and demonstrated that Rb2 significantly increased glucose consumption in HepG2 cells. The phosphorylation of AMP-activated protein kinase (AMPK) was increased by treatment with Rb2. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据