著者

三宅 義明

出版者

THE JAPAN ASSOCIATION FOR THE INTEGRATED STUDY OF DIETARY HABITS

雑誌

日本食生活学会誌 (ISSN:13469770)

巻号頁・発行日

vol.22, no.1, pp.35-40, 2011

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Three scavengers of DPPH (1, 1-diphenyl-2-picrylhydrazyl) radical were isolated from commercial mint teas such as spearmint and peppermint, and they were identified as eriodictyol 7-<i>O</i>-β-rutinoside (eriocitrin), luteolin 7-<i>O</i>-β-rutinoside, and rosmaric acid by HPLC and LC-MS. The extracts of mints leaves such as peppermint variegate, orange mint, black peppermint, candy mint, apple mint, and Japanese mint (hakka) by hot water were examined for content of radical scavengers and their activity. It was shown to have high correlative relationship (<i>R</i>=0. 914) between the sum content of three scavengers in the extract and the activity. The isolated scavengers and their aglycones (eriodictyol and luteolin) were shown to have the high scavenging activity for superoxide as well as DPPH radical. They were examined for suppressive effects on the expression of blood adhesion molecules. Eriodictyol, luteolin, and rosmaric acid exhibited significantly the high activity (<i>P</i><0. 05).