The comparison about inhibition of five Chinese herbal medicines to two different resources alpha-glycosidase

OBJECTIVE: To compare alpha-glycosidase inhibitor microamount screening models which are established by two different resources alpha-glycosidase to screen the Chinese herbal medicines which have great alpha-glycosidase inhibition. METHODS: Comparing the activities of two different resources alpha-glycosidase with glucose oxidase method, then establishing optimal reaction conditions. Extracting the water soluble compositions of Chinese gallnut, paeoniae radix, Glycyrrhiza, rhubarb, fructus by boiling ,then using the alpha-glycosidase inhibition model to check and compare their alpha-glycosidase inhibitions. RESULTS: Five Chinese herbal medicines all had alpha-glycosidase inhibition, and the greatest was Chinese gallnut. CONCLUSION: The activities of two resources alpha-glycosidase are certainly different, but they do not have significant influence on findings of screening alpha-glycosidase inhibitors in vitro. Water soluble compositions of five Chinese herbal medicines have alpha-glycosidase inhibition.