期刊
MOLECULES
卷 18, 期 9, 页码 11614-11623出版社
MDPI
DOI: 10.3390/molecules180911614
关键词
green tea extracts; polyphenols; EGCG; combination
资金
- Science and Technology Department of Zhejiang Province, China [2012T202-05]
- Ministry of Science and Technology, China [2011BAD01B03-5-1]
Green tea, green tea polyphenols and epigallocatechin gallate (EGCG) are confirmed to have beneficial effects in the treatment of diabetes mellitus, and a possible mechanism can be ascribed to their inhibitory effect against alpha-amylase and alpha-glucosidase in the digestive tract. In this paper, we first investigated the combined inhibitory effect of green tea extracts, green tea polyphenols or EGCG with acarbose on alpha-amylase and alpha-glucosidase in vitro. Our results indicated that the interaction between green tea extracts (green tea polyphenols or EGCG) and acarbose was complicated. The combination of green tea extracts, green tea polyphenols or EGCG with acarbose had a synergistic effect on alpha-amylase and alpha-glucosidase at low concentrations and the combined effect turned out to be antagonistic at high concentrations according to the Combination Index (CI) values. These findings not only provided some significant quantitative values, but also provide some valuable implications for the combined use of acarbose and GTE (GTP or EGCG) in the treatment of diabetes mellitus.
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