桑叶中糖苷酶抑制活性组分的筛选及体外活性研究

目的 筛选桑叶中具有糖苷酶抑制活性的组分。方法 采用柱层析法将桑叶水提物进行分离，并利用体外糖苷酶抑制模型对活性部位进行跟踪研究，验证其效果。结果 体外实验结果表明桑叶提取物中生物碱、黄酮、多糖等部位均有糖苷酶抑制活性，其中生物碱组分活性最强。结论 桑叶的降糖作用与各组分的糖苷酶抑制活性有关。

Screening of Glucosidase Inhibitors from Various Fractions of Mulberry Leaves

To search for glucosidase inhibitors of various fractions extracted from Mulberry leaves. Methods The constituents of Mulberry leaves, water fraction were prepared by the process of boiling, condensing, precipitating, exchanging with resins and rinsing. In vitro glucosidase inhibitory activities were examined by photometric bioassay derived from rats. Results The glucosidase inhibitory activities were found in all the constituents of alkaloids, flavones and amylases, the alkaloid constituent being the strongest. Conclusion The effect of reducing blood glucose of Mulberry leaves is related to the inhibitory activities against glucosidase of different constituents.