Author:
Hong Hin-Chu,Li Song-Lin,Zhang Xiao-Qi,Ye Wen-Cai,Zhang Qing-Wen
Abstract
Abstract
Background
This study aims to isolate the α-glucosidase inhibitory compounds from mulberry leaves (Morus atropurpurea Roxb., Moraceae) and to develop an analytical method for quantification of the compounds.
Methods
Four flavonoids, rutin (1), isoquercetin (2), kaempferol-3-O-rutinoside (3) and astragalin (4), were isolated by column chromatography from mulberry leaf water extracts (MWE). The α-glucosidase inhibitory activities of MWE and the four isolated compounds were evaluated by a microplate-based in vitro assay. The content of the isolated flavonoids in M. atropurpurea leaves purchased from different local herbal stores or collected in different locations was determined by high performance liquid chromatography.
Results
The four flavonoids (1–4) showed α-glucosidase inhibitory activities, with rutin (1) and astragalin (4) showing high α-glucosidase inhibitory activities (IC50 values of 13.19 ± 1.10 and 15.82 ± 1.11 μM, respectively). The total contents of the four flavonoids were different among eight samples examined, ranging from 4.34 mg/g to 0.53 mg/g.
Conclusions
The four flavonoids in M. atropurpurea leaves could inhibit α-glucosidase activity.
Publisher
Springer Science and Business Media LLC
Subject
Complementary and alternative medicine,Pharmacology
Cited by
56 articles.
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