Article Publish Status: FREE
Abstract Title:

6-hydroxyflavonoids as alpha-glucosidase inhibitors from marjoram (Origanum majorana) leaves.

Abstract Source:

Biosci Biotechnol Biochem. 2003 Feb ;67(2):445-7. PMID: 12729019

Abstract Author(s):

Jun Kawabata, Kenji Mizuhata, Eri Sato, Tetsuo Nishioka, Yoritaka Aoyama, Takanori Kasai

Article Affiliation:

Jun Kawabata


A methanol extract of marjoram leaves strongly inhibited rat intestinal alpha-glucosidase. Five 6-hydroxyflavonoids, 6-hydroxyapigenin (scutellarein; IC50 for sucrose hydrolysis by rat intestinal alpha-glucosidase, 12 microM), 6-hydroxyapigenin-7-O-beta-D-glucopyranoside (>500 microM), 6-hydroxyluteolin-7-O-beta-D-glucopyranoside (300 microM), 6-hydroxyapigenin-7-O-(6-O-feruloyl)-beta-D-glucopyranoside (>500 microM), and 6-hydroxyluteolin-7-O-(6-O-feruloyl)-beta-D-glucopyranoside (>500 microM), were isolated as active principles and related compounds. The two feruloylglucosides are novel compounds.

Study Type : In Vitro Study

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