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Elucidation of the in vivo absorption and metabolism of g-oryzanol (OZ) and the biosynthetic pathway of OZ in plants

Research Project

Project/Area Number 19K15783
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 38050:Food sciences-related
Research InstitutionTohoku University

Principal Investigator

Junya Ito  東北大学, 農学研究科, 助教 (50781647)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsγ-オリザノール / 吸収代謝 / 生合成 / LC-MS/MS / 質量分析
Outline of Research at the Start

本研究では、質量分析による詳細な分子種解析を基盤にし、生体におけるγ-オリザノール(OZ)の吸収代謝および植物体での生合成経路を明らかにする。そのために、質量分析を駆使し、OZおよび生体における代謝物、植物体での生合成における前駆体を分子種レベルで解析する。この解析結果をもとに、OZの活性本体の解明を目指した生体における吸収代謝機構の解明と、OZを含む代表的な植物体である米や大麦におけるOZの生合成経路の解明を目指す。以上の成果をもってOZの活用を通じた健康実現の基盤創造を目指す。

Outline of Final Research Achievements

To elucidate the in vivo absorption and metabolism of γ-oryzanol (OZ) and the biosynthetic pathway of OZ in plants, we conducted (1) elucidation of the absorption and metabolism of OZ in vivo aiming at clarifying the active form/metabolite of OZ, (2)-(1) structural determination and evaluation of the distribution of triterpene alcohol (TTA)-type OZ molecular species in barley, and (2)-(2) elucidation of the biosynthetic pathway of OZ in rice and barley. From (1), we identified that the absorption and metabolism of OZ differ among OZ molecular species, hence different OZ molecular species existed in vivo in different forms. In (2)-(1), we revealed that TTA-type OZ, previously considered to exist only in rice, also existed in various barley varieties. In (2)-(2), we demonstrated the existence of OZ-like compounds that possess caffeic acid as a backbone, which were useful to estimate the biosynthetic pathway of OZ.

Academic Significance and Societal Importance of the Research Achievements

本研究には、質量分析をはじめとした高度な分析技術によるOZやOZの代謝物・前駆体の詳細な解析が必須であり、申請者はこれまでにこのような解析手法の構築や活用に重点的に取り組んできた。これらの独創的な研究によって、優れた機能性を有するOZの吸収代謝や活性本体、作用機序の理解を真に深めるとともに、世界的にも不明な米や大麦等における生合成経路の解明を目指す。これらの成果は、OZを通じた健康実現の基盤創造へ繋がり、その社会的意義と波及性は極めて大きい。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (9 results)

All 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] Comparison of Blood Profiles of γ-Oryzanol and Ferulic Acid in Rats after Oral Intake of γ-Oryzanol2019

    • Author(s)
      Kokumai Takumi、Ito Junya、Kobayashi Eri、Shimizu Naoki、Hashimoto Hiroyuki、Eitsuka Takahiro、Miyazawa Teruo、Nakagawa Kiyotaka
    • Journal Title

      Nutrients

      Volume: 11 Issue: 5 Pages: 1174-1174

    • DOI

      10.3390/nu11051174

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Definitive evidence of the presence of 24-methylenecycloartanyl ferulate and 24-methylenecycloartanyl caffeate in barley2019

    • Author(s)
      Ito Junya、Sawada Kazue、Ogura Yusuke、Xinyi Fan、Rahmania Halida、Mohri Tomoyo、Kohyama Noriko、Kwon Eunsang、Eitsuka Takahiro、Hashimoto Hiroyuki、Kuwahara Shigefumi、Miyazawa Teruo、Nakagawa Kiyotaka
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 12572-12572

    • DOI

      10.1038/s41598-019-48985-6

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 大麦における米特有γ-オリザノール分子種の同定2020

    • Author(s)
      伊藤隼哉, 澤田一恵, 仲川清隆
    • Organizer
      日本農芸化学会2020年度大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] γ-オリザノールは分子種によって生体での吸収代謝が異なるのか2020

    • Author(s)
      林雪子, 伊藤隼哉, 國米匠, 前田鋭, 橋本博之, 仲川清隆
    • Organizer
      第74回日本栄養・食糧学会大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] γ-オリザノールおよびフェルラ酸の吸収代謝の評価2020

    • Author(s)
      伊藤隼哉, 國米匠, 林雪子, 橋本博之, 仲川清隆
    • Organizer
      日本ビタミン学会第72回大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] γ-オリザノールの血漿中での存在形態は分子種により異なるのか2020

    • Author(s)
      林雪子, 伊藤隼哉, 國米匠, 前田鋭, 橋本博之, 仲川清隆
    • Organizer
      日本油化学会第59回年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ラットにおける γ-オリザノールの吸収と代謝2019

    • Author(s)
      伊藤隼哉, 國米匠, 橋本博之, 永塚貴弘, 宮澤陽夫, 仲川清隆
    • Organizer
      第73回日本栄養・食糧学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Evaluation of γ-Oryzanol Accumulation and Lipid Metabolism of Mouse Following A Long-Term Administration of γ-Oryzanol2019

    • Author(s)
      Junya Ito, Eri Kobayashi, Naoki Shimizu, Takumi Kokumai, Shunji Kato, Kazue Sawada, Hiroyuki Hashimoto, Takahiro Eitsuka, Teruo Miyazawa, Kiyotaka Nakagawa
    • Organizer
      Asian Congress of Nutrition 2019 (ACN 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Book] アグリバイオ2019

    • Author(s)
      伊藤隼哉, 永塚貴弘, 仲川清隆
    • Total Pages
      100
    • Publisher
      北隆館
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2022-01-27  

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