期刊
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
卷 51, 期 12, 页码 2692-2700出版社
WILEY-BLACKWELL
DOI: 10.1111/ijfs.13259
关键词
Ampelopsis grossedentata leaves; cellular antioxidant activity; tannin; tea; alpha-glucosidase inhibitor
资金
- National Natural Science Foundation of China [31571782]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [14HASTIT019]
- Program for Innovative Research Team (in Science and Technology) in University of Henan Province [13IRTSTHN006, 16IRTSTH N007]
Leaf of Ampelopsis grossedentata is a new resource of functional foods with healthful properties. Antioxidant and -glucosidase inhibitory activities of water extract (made in the style of drinking), tannin fraction (TF) and dihydromyricetin (DMY) from A.grossedentata leaves were evaluated. The main component of TF was identified as gallotannins. DPPH and ABTS radical scavenging activities and reducing power of TF were superior to those of water extract, however, inferior to those of DMY. In no PBS wash protocol of cellular antioxidant activity assay, DMY and TF exhibited similarly, while in PBS wash protocol, the value of TF was higher than that of DMY. In addition, TF possessed the highest -glucosidase inhibitory activities (IC50=1.94gmL(-1)), followed by water extract (IC50=23.10gmL(-1)) and DMY (IC50=72.21gmL(-1)). The strong -glucosidase inhibitory activity of TF may attribute to the binding capacity to enzymes, as confirmed by fluorescence analysis.
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