The alpha- and beta-glucosidase activity in natural samples can be readily measured during short incubation times (20 min) by using the artificial substrates 4-methylumbelliferyl-alpha-d-glucoside and 4-methylumbelliferyl-beta-d-glucoside. The apparent K(m) of both alpha- and beta-glucosidase for these respective substrates is 0.01 muM. The homologous disaccharides maltose and cellobiose compet...

An efficient and rapid affinity-based screening method for directly fishing out natural alpha-glucosidase inhibitors from Cyperus. rotundus extract by using immobilized enzyme technology combined with UHPLC-QTOF MS analysis was established. As a results, without time-consuming and laborious isolation workload and false positive interference, five natural alpha-glucosidase inhibitors were succes...

Objective: Alpha-glucosidase, as a carbohydratase catalyses the liberation of alpha-glucose from the nonreducing end of some carbohydrates from foods in digestive tract.  Consequently, retard absorption of glucose by the inhibition of carbohydrate hydrolyzing enzymes is one of the therapeutic approaches to decrease the postprandial hyperglycemia. Recently, a great deal of attention has been pai...

BACKGROUND N-methyl-1-deoxynojirimycin (MOR-14), an alpha-glucosidase inhibitor, reduces the glycogenolytic rate by inhibiting the alpha-1,6-glucosidase of glycogen-debranching enzyme in the liver, in addition to possessing an antihyperglycemic action by blocking alpha-1,4-glucosidase in the intestine. Because the reduction of the glycogenolytic rate may be one of the mechanisms of myocardial p...

glycosidases are the enzymes involved in various biochemical processes related to metabolic disorders and diseases. therefore, much effort has been focused on searching novel pharmacotherapy for the treatment of these ailments from medicinal plants due to higher safety margins. to pursue these efforts, the present study was performed to evaluate the α-glucosidase inhibitory activities of thirty...

An efficient and rapid affinity-based screening method for directly fishing out natural alpha-glucosidase inhibitors from Cyperus. rotundus extract by using immobilized enzyme technology combined with UHPLC-QTOF MS analysis was established. As a results, without time-consuming and laborious isolation workload and false positive interference, five natural alpha-glucosidase inhibitors were succes...

In the current study, we screened 7 clonal lines from single seed phenotypes of Lamiaceae family for the inhibition of alpha-amylase, alpha-glucosidase and angiotensin converting enzyme (ACE) inhibitory activity. Water extracts of oregano had the highest alpha-glucosidase inhibition activity (93.7%), followed by chocolate mint (85.9%) and lemon balm (83.9%). Sage (78.4 %), and three different c...

Alpha glucosidase inhibitors have been shown to be associated with pneumatosis intestinalis (PI) in recent reports. We herein report the case of a 73-year old man who received treatment with an alpha glucosidase inhibitor (acarbose) and presented with acute abdomen. A computed tomography scan demonstrated PI in addition to intrahepatic portal air and pneumoperitoneum. During exploratory laparot...

The mechanism of nutrient-evoked insulin release is clearly complex. One part of that mechanism is postulated to be the activation of the glycogenolytic enzyme acid glucan-1,4-alpha-glucosidase. As nitric oxide (NO) has been found to be a potent inhibitor of glucose-stimulated insulin secretion, we have now investigated a possible influence of exogenous NO and inhibition of endogenous NO produc...