2006年9月
Antioxidant and alpha-amylase inhibitory compounds from aerial parts of Varthemia iphionoides Boiss
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
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- 巻
- 70
- 号
- 9
- 開始ページ
- 2178
- 終了ページ
- 2184
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1271/bbb.60132
- 出版者・発行元
- TAYLOR & FRANCIS LTD
Various extracts of aerial parts of Varthemia (Varthemia iphionoides Boiss) were investigated for radical-scavenging activity, antioxidative activity, and porcine pancreas a-amylase inhibitory activity. The ethanol and water extracts showed a pronounced 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging activity, with inhibition of about 90% at a concentration of 100 mu g/ml, and alpha-amylase inhibitory activity of about 70% at a concentration of 200 mu g/ml by the 2-chloro-4-nitro-phenyl alpha-maltotrioside (CNP-G(3)) degradation method. The ethanol extract was purified by column chromatography to give seven 3-methoxyflavones (1-7) and eudesmane sesquiterpene, selina-4,11(13)-dien-3-on-12-oic acid (8). The structures of these compounds were established by NMR, MS, and UV spectroscopy. Of 3-methoxyflavones, 5,7,4 '-trihydroxy-3,3 '-dimethoxyflavone (1), 5,7,4 '-trihydroxy-3,3 '-dimethoxyflavone (2), and 5,4 '-dihydroxy-3,7,3 '-trimethoxyflavone (3,7,3 '-tri-O-methyl-quercetin) (7) exhibited pronounced radical-scavenging activity. The antioxidative activity in the linoleic acid system was considerable in compounds 1, 2, and 5,4 '-dihydroxy-3,6,7-trimethoxyflavone (4). Compounds 1, 2, 4, 5 (5,7,4 '-trihydroxy-3-methoxyflavone), and 6 (5,4 '-dihydroxy-3,7-dimethoxyflavone) showed markedly high inhibitory activity against porcine pancreas alpha-amylase. Eudesmane sesquiterpene did not show any activity.
- リンク情報
- ID情報
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- DOI : 10.1271/bbb.60132
- ISSN : 0916-8451
- eISSN : 1347-6947
- CiNii Articles ID : 130000029736
- Web of Science ID : WOS:000240972400021