ウメガキ ケイゾウ    UMEGAKI Keizo
   梅垣 敬三
   所属
食健康科学部 食安全マネジメント学科
 
生活機構研究科 生活科学研究専攻
 
研究支援機器センター 所属教員
 
生活機構研究科 生活機構学専攻
   職種
教授
言語種別 英語
発行・発表の年月 2019/10
形態種別 学術雑誌
査読 査読あり
標題 Identification of Compounds in Coleus forskohlii Extract Involved in the Induction of Hepatic CYP and Fatty Liver in Mice.
執筆形態 共著
掲載誌名 J Oleo Sci
掲載区分国外
巻・号・頁 68(10),pp.995-1002
著者・共著者 Umegaki K, Yokotani K, Marumoto S, Miyazawa M.
概要 Coleus forskohlii extract (CFE), a popular weight-loss herbal product, induces hepatic cytochrome P450 (CYP) and fatty liver in mice; however, its main bioactive ingredient, forskolin, does not show such effects. To ensure the safety of CFE as a dietary supplement, identification of the compounds implicated in the induction of hepatic CYP and fatty liver is required. In this study, we separated a crude CFE extract into 5 fractions (Fr.) by column chromatography and administered the fractions to mice for one week to assess their ability to induce CYP and fatty liver. CYP induction was detected for all fractions, indicating that many compounds may be involved in CYP induction, while fatty liver was only detected for Fr. 2. Further isolation and purification of Fr. 2 by column chromatography identified 14-deoxycoleon U as a major compound and crocetin dialdehyde as a pigment compound. An in vivo mouse study revealed that crocetin dialdehyde had no effect on the liver and, as 14-deoxycoleon U was the major compound in Fr. 2, it is likely that the active compound inducing fatty liver in CFE is 14-deoxycoleon U. These findings will facilitate the preparation of standardized safe CFE ingredients for dietary supplements.