Antihyperglycemic α-Glucosidase Inhibitory Activity of Ethanol Extract from Neolentinus lepideus

For development a new anti-diabetic compound from edible mushroom, antihyperglycemic α-glucosidase inhibitory activities of Pleurotus ostreatus, Pleurotus cornucopiae, Pleurotus salmoneostramineus, Pleurotus eryngii and Neolentinus lepideus were investigated on its water and ethanol extracts. α-Glucosidase inhibitory activity of Neolentinus lepideus fruiting body showed the highest at 86.3% in the 95% ethanol extracts and water extract from Pleurotus cornucopiae was also higher at 48.5% among water extracts. Therefore, Neolentinus lepideus which showed very high α-glucosidase inhibitory activity was selected as a new anti-diabetic agent-containing mushroom and the α-glucosidase inhibitor was maximally extracted when treated with 95% ethanol at 30 o C for 48 hr. The ethanol extracts from Neolentinus lepideus fruiting body showed dosage-dependent hypoglycemic action after administration to 120 min in the SD-rat and streptozotocin-induced diabetic SD-rat.