Pdf alphaamylase and alphaglucosidase enzyme inhibition. The percentage inhibition of assays showed maximum inhibitory effects 59. Thereby, acarbose as a alpha glucosidase inhibitor can be used in. This may be achieved through the use of oral hypoglycemic drugs such as biguanides, insulin secretagogues, and. Synthesis and evaluation of 2,3,4trihydroxybenzoylcontaining flavonoid analogs and 6aminoflavones as alpha glucosidase inhibitors.
Alphaamylase inhibition potential of the morinda lucida extracts was determined figure 1. Aug 27, 2019 puerh tea was presumed to have antihyperglycemic effects via inhibition on alpha amylase and alpha glucosidase. Glucosidase hydrolyzes the substrate mix to release the pnitrophenol that can be measured colorimetrically od 410 nm. Chapter4 antidiabetic activity of the selected plants by in. The e cacy of the ibpp fraction is also supported by its lower ic50 and b the insolublebound polyphenols ibpp. Artocarpus heterophyllus showed the greater % inhibition of the alpha glucosidase enzyme compared to other plant extracts. This results in a smaller and slower rise in blood glucose levels following meals, and effectively throughout the day. Im currently doing the assay for inhibition of glucosidase. D i a b e tes o f mt l ab n r u o siol journal of diabetes. The reason maitake lowers blood sugar is because the mushroom naturally contains an alpha glucosidase inhibitor.
Alpha glucosidase inhibitors work by competitive and reversible inhibition of these intestinal enzymes. In this assay, glucosidase activity is determined by a reaction in which glucosidase hydrolyzes pnitrophenyl dglucopyranoside resulting in the formation of a. The purpose of the present study was to investigate the inhibitory effect of morinda lucida leaf. Alpha glucosidase inhibition works by reducing glucose absorption due to decreased carbohydrate digestion. The management of blood glucose level is the hallmark in the treatment of this disease. It is also the major enzyme produced during the malting process. There are a large number of natural products with alpha glucosidase inhibitor action.
In vitro studies on alpha amylase and alpha glucosidase. They slow the digestion of carbohydrates and delay glucose absorption. Kinetic study and in silico analysis was also carried out to further investigate the mechanism of inhibition. Inhibition of alphaglucosidase assay inhibition of alphaglucosidase assay was done by following a previously published method with slight modification zahratunnisa et al. A comparison of theglucosidase and porcine pancreatic. The alpha glucosidase inhibitors are contraindicated in patients with diabetic ketoacidosis, inflammatory bowel disease, ulcerative colitis, intestinal obstruction, any chronic intestinal disease disrupting digestionabsorption, any condition that may deteriorate as a result of.
Alpha amylase and alpha glucosidase enzyme inhibition and antioxidant potential of 3oxolupenal and katononic acid isolated from nuxia oppositifolia. Inhibition of glucosidase and amylase by flavonoids. The alphaglucosidase inhibition was assayed using purified enzyme according to the modified method described by matsui et al. The present study indicated that artocarpus heterophyllus could be useful in. The modes of inhibition of both enzymes was determined using lineweaverburke plot. The results of the present study indicate that, fraction 2 of a. Inhibitory effects of puerh tea on alpha glucosidase and. In vitro antidiabetic activity and mechanism of action of. This assay was carried out to investigate the in vitro inhibitory activity of eess on. Inhibition of these enzymes delay and in some cases halt carbohydrate digestion thus prolonging overall carbohydrate digestion time causing a reduction in the rate of glucose absorption and consequently reducing postprandial plasma glucose rise henfeld et al. The glucosidase activity assay kit provides a simple and direct procedure for measuring glucosidase activity in biological samples.
Alpha amylase and alpha glucosidase inhibitory effects of. Alphaglucosidase inhibition assay the alphaglucosidase inhibition assay was performed using a method from schmidt, lauridsen, dragsted, nielsen, and staerk 2012a. Although acarbose can be used as monotherapy, it is typically added to insulin or other oral agents to achieve glycemic control in type 2 diabetes. Glucosidase assay buffer, mix thoroughly and keep on ice. Paper open access related content inhibition of glucosidase. Nowadays, alphaglucosidase inhibitors like acarbose. Glucosidase inhibitory activity of dichloromethane. Alpha glucosidase inhibition assay was done according to the method of remirez et al. Schematic flow chart of amylase enzyme inhibition assay procedure 4. In a 96well microplate, each well was added with 10 l of extract dissolved in dmso and 90 l of 0. Glucosidase activity assay kit catalog number mak123 storage temperature 20 c technical bulletin product description glucosidase hydrolyzes carbohydrates by acting on terminal, nonreducing 1 4linked dglucose residues with the release of dglucose.
The alphaglucosidase inhibition assay was determined using a method described by sancheti et al. This is an easy, quick and highthroughput capable kit that can measure 0. Alphaglucosidase activity assay kit ab174093 abcam. Glucosidase inhibitor screening kit colorimetric k938. Alpha amylase is resistant to inactivation by this treatment at ph between 6. Absorbance reading was measured at 540 nm and 405 nm for the aamylase and the aglucosidase inhibitory assay, respectively. Samples, standard solutions gamma and alpha mangostin or positive control acarbose with different concentrations 50 l, tables 1 and 3, glucosidase 50 l, 2unitml and phosphate buffer. Alpha glucosidase an overview sciencedirect topics. Alpha glucosidase inhibition assay principle and procedure. In abcam s alphaglucosidase activity assay kit colorimetric ab174093. Alphaamylase and alphaglucosidase enzyme inhibition and antioxidant potential of 3oxolupenal and katononic acid isolated from nuxia oppositifolia.
Glucosidase 10 mm in sodium phosphate buffer 100 mm, ph 6. Therefore, cellular assays are used to determine the mechanism of action of. Hence, further studies may throw light on the antidiabetic potential of a. Nowadays, alpha glucosidase inhibitors like acarbose. Since beta amylase interferes with the enzymatic determination of alpha amylase it was inactivated by heating the extract at 70c for 15 minutes. Defects in this gene are the cause of glycogen storage disease ii, also known as pompes disease, which is an autosomal recessive disorder with a broad clinical spectrum. Alphaglucosidase inhibitory activity of garcinia lateriflora. Alpha glucosidase inhibition assay the spp and ibpp fractions inhibited the alpha glucosidase activity in a dosedependent manner. For example, research has shown the culinary mushroom maitake grifola frondosa has a hypoglycemic effect. Glucosidase inhibitory activity of polyphenols from the.
Acarboses k i value for inhibition of porcine pancreatic. Various studies have been conducted on the competitive behavior of acarbose on various digestive enzymes. Diabetes mellitus is a metabolic disorder of glucose metabolism. The acetone extract of picralima nitida displayed the most effective inhibition of both. In abcams alphaglucosidase activity assay kit colorimetric ab174093. Cmpe may exert hypoglycemic effects through the same mechanism. Alpha glucosidase inhibitor it is usually used when a healthy diet and physical activity alone has been unsuccessful, although it is sometimes used together with a sulphonylurea. Different forms of acid alpha glucosidase are obtained by proteolytic processing. Glucosidase assay buffer10 l 20 l solvent control 10 l 2. The ic 50 values of stem extract was found to be 73.
Alpha glucosidase activity can be measured invitro by determination of the reducing sugar glucose arising from hydrolysis of sucrose by glucosidase enzyme. In vitro alpha glucosidase inhibition and freeradical. However, no integerated literatures were published to substantiate such presumption. The enzyme is very stable and can be incubated at 60c during the mashing process in the brewery. Prior to use, 1 ml of enzyme solution was diluted 25 times with phosphate buffer ph 7. Dglucopyranoside that is hydrolyzed specifically by. Acarbose works by slowing down the absorption of starchy foods from the intestine. Alpha glucosidase inhibition assay the glucosidase inhibitory activity was carried out spectrophotometrically using pnpg as substrate zhou et al. The inhibition of amylase by all the extracts at lower concentrations 0. This assay was carried out using a modified procedure of mccue and shetty 17. Evaluation of amylase and glucosidase inhibitory activity. The k i for competitive inhibition of bakers yeast.