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Development of flow-injection ESR system for evaluation of antioxidant activity of hydrophobic and hydrophilic compounds involved in vegetables

Research Project

Project/Area Number 17K07817
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Food science
Research InstitutionKyoto Institute of Technology

Principal Investigator

Tajima Kunihiko  京都工芸繊維大学, 分子化学系, 教授 (50163457)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords抗酸化活性 / 脂溶性物質 / アルコキシルラジカル / スーパーオキシドラジカル / 電子スピン共鳴 / 脂溶性抗酸化反応 / アルコキシルラジカル」 / ビタミンE誘導体 / 不飽和脂肪酸 / 脂溶性抗酸化物質 / 抗酸化活性評価 / 流通型ESR装置 / フローインジェクションESR / 活性酸素消去活性 / 親水性物質 / 流通型ESR / スピントラッピング
Outline of Final Research Achievements

A new lipophilic spin-trapping flow-injection electron spin resonance (LFI-ESR) system was developed for quantitative detection of DMPO spin-adduct of alkoxyl radical (RO・), which was produced by thermal decomposition of an azo-initiator (AIBN) in ethyl acetate at 70 °C. The 50% inhibition dose (ID50) of tocopherol derivatives, and unsaturated fatty acids, were determined by monitoring the ESR signal intensity of the DMPO spin-adducts of RO・ radical (DMPO/OR). On the basis of the observed ID50 values, the lipophilic alkoxyl radical eliminating capacities (L-AREC) of these lipophilic antioxidants were determined using TRX as a standard. The L-AREC values estimated by LFI-ESR method are concluded to be a practical and reliable indicator that reflect the inhibiting abilities of lipophilic antioxidants towards the radical chain reaction involved in the autoxidation processes of unsaturated fatty acids.

Academic Significance and Societal Importance of the Research Achievements

近年、青果物に含まれる種々の機能性物質が我々の健康維持と促進に大きな役割を果たすことが広く認識され、有用物質を高濃度で含有する青果物の獲得に向けた品種改良と栽培技術の改良が多方面で研究されてきた。青果物の抗酸化活性はそれらの品質に直結する重要な機能性のひとつであるため、その活性を数値化する方法論に関する研究が継続されてきた。しかし、脂溶性物質の抗酸化活性を簡便かつ精度良く数値化する分析法の開発は立ち後れていた。本研究では、アルコキシルラジカル(RO・)の還元反応の効率を基準物質(TRX)濃度換算値として数値化する計測技術、装置開発および解析技術を確立することができた。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2020 2019 2018 2017

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (3 results) (of which Invited: 1 results)

  • [Journal Article] Development of Flow-Injection Spin-Trapping ESR Methods for0 Kinetic Study of the O2-・ Radical Scavenging Reaction with Mixtures of Phenolic Antioxidants,2020

    • Author(s)
      Y. Sakurai, S. Yamaguchi, N. Yamamoto, T. Yamashita, Y. Lu, K. Kuwabara, T. Yamaguchi, Y. Miyake, K. Kanaori, and K. Tajima,
    • Journal Title

      Bull. Chem. Soc. Jpn.

      Volume: 93 Issue: 6 Pages: 730-744

    • DOI

      10.1246/bcsj.20200046

    • NAID

      130007856027

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Stopped-flow-optical Absorption and -electron Spin Resonance Studies on Short-lived Quercetin Semiquinone Radical Produced by Redox Reactions with O2-・ Radical in DMSO,2020

    • Author(s)
      K. Kuwabara, R. Nakano, Y. Sakurai, T. Yamaguchi, Y. Miyake, K. Kanaori, and K. Tajima
    • Journal Title

      Chem. Lett.

      Volume: 49 Issue: 3 Pages: 260-263

    • DOI

      10.1246/cl.190898

    • NAID

      130007805924

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of a Flow-injection ESR system for Evaluating the Lipophilic Alkoxyl Radical Eliminating Capacities (L-AREC) of Tocopherol Analogues and Unsaturated Fatty Acids2019

    • Author(s)
      Yasuhiro Sakurai, Tomoko Yamaguchi, Kai Ando, Keiko Kuwabara, Hiroki, Nakajima, Chie Morimoto,2 Shinichi Yoshikawa, Masumi Niwa, Yusuke Miyake, Kenji Kanaori, Akira Nakajima, Kunihiko Tajima
    • Journal Title

      Bulletin of chemical society Japan

      Volume: 印刷中 Issue: 7 Pages: 1218-1225

    • DOI

      10.1246/bcsj.20190059

    • NAID

      130007679379

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Novel non-phosphorylative pathway of pentose metabolism from bacteria2019

    • Author(s)
      Watanabe Seiya、Fukumori Fumiyasu、Nishiwaki Hisashi、Sakurai Yasuhiro、Tajima Kunihiko、Watanabe Yasuo
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 155-155

    • DOI

      10.1038/s41598-018-36774-6

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Application of a stopped-flow EPR method for the detection of short-lived flavonoid semiquinone radicals produced by oxidation using 15N-labeled nitrosodisulfonate radical (Fremy’s salt)2018

    • Author(s)
      Keiko Kuwabara, Yasuhiro Sakurai, Hodaka Sanuki, Chie Morimoto, Yong Li, Yusuke Miyake, Kenji Kanaori, and Kunihiko Tajima
    • Journal Title

      Applied Magnetic Resonance

      Volume: 印刷中 Issue: 8 Pages: 911-924

    • DOI

      10.1007/s00723-018-1012-3

    • Related Report
      2018 Research-status Report 2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Rapid-Flow and Spin-Trapping ESR Study on Carbonyl-Conjugated Radicals of Modified Poly(vinyl alcohol) Bearing 1,2-Propanediol Pendant Moiety as Intermediates of Graft Copolymerization2017

    • Author(s)
      Matsui, Kazuma; Nishihara, Yuko; Yamaguchi, Tomoko; Sakurai, Yasuhiro; Miyake, Yusuke; Ikegami, Tohru; Kanaori, Kenji; Tajima, Kunihiko
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 90 Issue: 12 Pages: 1293-1308

    • DOI

      10.1246/bcsj.20170235

    • NAID

      130006250362

    • ISSN
      0009-2673, 1348-0634
    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] カテキン誘導体のスーパーオキシラジカル消去活性と反応機構2019

    • Author(s)
      田嶋邦彦 ,櫻井康博 ,盧 瑶 ,三宅祐輔 ,金折賢二
    • Organizer
      第66回日本食品科学工学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] LFI-ESR 法による脂溶性物質とアルコキシルラジカルの反応機構解2019

    • Author(s)
      櫻井康博 ,山口智子 ,中島 暉 ,吉川真一 ,三宅祐輔 ,金折賢二 ,田嶋邦彦
    • Organizer
      第66回日本食品科学工学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] HPLC-ESR装置による青果物水溶性成分の抗酸化活性オンライン分析2018

    • Author(s)
      田嶋邦彦
    • Organizer
      日本分析化学会
    • Related Report
      2018 Research-status Report
    • Invited

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Published: 2017-04-28   Modified: 2021-02-19  

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