A novel method for the assay of alpha-glucosidase inhibitory activity using a multi-channel oxygen sensor
| Autor: | Kiyoshi Matsumoto, Toshiro Matsui, Kayoko Takemata, Kanthi J. M. Abesundara, Hideo Katayama, Kiyofumi Takayama |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
food.ingredient
1-Deoxynojirimycin Stereochemistry Biosensing Techniques Gelatin Analytical Chemistry Sepharose Inhibitory Concentration 50 food medicine Animals Glucose oxidase Glycoside Hydrolase Inhibitors Enzyme Inhibitors Electrodes Multi channel Acarbose chemistry.chemical_classification Chromatography biology alpha-Glucosidases Enzymes Immobilized Rats Oxygen Membrane Enzyme Glucose chemistry Calibration biology.protein Carbohydrate Epimerases Oxygen sensor medicine.drug |
| Zdroj: | Analytical sciences : the international journal of the Japan Society for Analytical Chemistry. 18(12) |
| ISSN: | 0910-6340 |
| Popis: | The quantification of glucose by using a multi-channel dissolved oxygen (DO) meter (DOX96) with immobilized glucose oxidase (GOD) and mutarotase (MUT) was performed. An evaluation of the inhibitory activities for alpha-glucosidase (AGH) by modifying our batch-type pseudo-in vivo assay system [Oki et al.; Biol Pharm. Bull., 2000, 232, 1084] was also performed using a DOX96. When 45 U/well GOD and 18.75 U/well MUT were immobilized on the surface of a gelatin membrane on the electrodes, the response shown by the decrease percent of DO (%) obtained with 8 electrode wells in the same row was linear with the glucose concentration up to 3.3 mM and a correlation coefficient larger than 0.9. To estimate the AGH inhibitory activity, AGH-immobilized Sepharose supports in the well of a silent screen plate were used. The IC50 values of acarbose and 1-deoxynojirimycin, a medicinal inhibitor for diabetes, were 0.70 +/- 0.08 microM and 0.40 +/- 0.13 microM, respectively, and coincided well with those by a pseudo-in vivo assay. |
| Databáze: | OpenAIRE |
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