Porcine pancreatic alpha-amylase inhibitors from Euonymus laxiflorus Champ.

作者：Van Bon Nguyen; Anh Dzung Nguyen; Quang Vinh Nguyen; Wang San Lang^*

来源：Research on Chemical Intermediates, 2017, 43(1): 259-269.

DOI：10.1007/s11164-016-2619-3

• alpha-Amylase inhibitors
• Diabetes
• Obesity
• Medicinal plants
• Euonymus laxiflorus Champ.
• Dak Lak

Twenty-six samples of indigenous medicinal plants were collected in Dak Lak Province of Vietnam and evaluated for alpha-amylase inhibitory activity. Of these samples, trunk bark extract from Euonymus laxiflorus Champ. (ELC extract) showed the greatest alpha-amylase inhibitory activity with the smallest 50 % inhibitory concentration (IC50) of 6.6 +/- 0.6 A mu g/mL against porcine pancreatic alpha-amylase. This extract possessed strong inhibitory activity against human saliva alpha-amylase and slightly lower activity against Bacillus subtilis alpha-amylase, with IC50 values of 4.2 +/- 0.2 and 27.8 +/- 1.8 A mu g/mL, respectively. ELC extract was found to be strongly thermostable, retaining 72-100 % relative activity even after heating at 100 A degrees C for 5 min to 2 h. This extract was also stable at various pH values. These results suggest that ELC extract may be a good candidate for treatment of non-insulin-dependent diabetes mellitus (NIDDM) and obesity.

• 出版日期2017-1