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Antioxidative effect of dexmedetomidine by spin resonance analysis

Research Project

Project/Area Number 17K11087
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Anesthesiology
Research InstitutionOita University

Principal Investigator

Kitano Takaaki  大分大学, 医学部, 教授 (20211196)

Co-Investigator(Kenkyū-buntansha) 新宮 千尋  大分大学, 医学部, 准教授 (30295191)
徳丸 治  大分大学, 福祉健康科学部, 教授 (40360151)
松本 重清  大分大学, 医学部, 准教授 (90274761)
Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsDexmedetomidine / 抗酸化作用 / フリーラジカル / ラジカル消去能 / 虚血再灌流傷害 / 電子スピン共鳴 / 抗酸化能 / 電子スピン共鳴法 / スピン解析 / 核磁気共鳴法 / 質量分析イメージング / 虚血-再灌流負荷 / 脳エネルギー代謝 / スピン共鳴解析
Outline of Final Research Achievements

Dexmedetomidine (DXM) is an α2 agonist and used for perioperative sedation. It is reported that DXM is neuroprotective against perioperative oxidative stress. We evaluated the direct scavenging activity of DXM against multiple free radical species by electron spin resonance spectrometry using the spin trapping method. DXM scavenged multiple oxygen-centered radicals including hydroxyl radical and superoxide anion in dose dependent manners. However, DXM did not scavenge nitrogen-centered radicals including nitric oxide. The present study demonstrated the direct scavenging activity of DXM against free radicals, especially oxygen-centered radicals, to which its antioxidative activity might be attributed.

Academic Significance and Societal Importance of the Research Achievements

近年,周術期管理に関して,術後認知機能障害が注目されている。術後認知機能障害は患者の予後に大きく影響する。その発症機序として,神経炎症の関与に加えて酸化ストレスの関与が示唆されている。周術期の鎮静目的に使用されるα2受容体アゴニストDXMが酸化ストレスに対して脳保護作用を示すといわれている。DXM が術後認知機能障害を予防するとの報告もあり,我々はその作用機序としてDXM の抗酸化作用の寄与を推察している。DXMの抗酸化作用の機序の一つとして直接的なフリーラジカル消去作用の関与を明らかにした本課題の成果により,DXMが周術期の酸化ストレスを軽減し,術後認知機能障害の予防する可能性が示唆された。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (11 results)

All 2020 2019 2018 2017

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Regional difference in energy metabolism in murine hippocampus2019

    • Author(s)
      Tokumaru O, Goto M, Abe S, Tandai-Hiruma M, Maruyama S, Kemuriyama T, Ogata K, Eshima N, Kitano T, Setou M, Nishida Y
    • Journal Title

      Journal of Cerebral Blood Flow & Metabolism

      Volume: 39 Issue: 1_suppl Pages: 204-205

    • DOI

      10.1177/0271678x19851020

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Direct free radical scavenging effects of water-soluble HMG-CoA reductase inhibitors2019

    • Author(s)
      Umeda Ryohei、Takanari Hiroki、Ogata Kazue、Matsumoto Shigekiyo、Kitano Takaaki、Ono Katsushige、Tokumaru Osamu
    • Journal Title

      Journal of Clinical Biochemistry and Nutrition

      Volume: 64 Issue: 1 Pages: 20-26

    • DOI

      10.3164/jcbn.18-48

    • NAID

      130007542260

    • ISSN
      0912-0009, 1880-5086
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dose-dependency of multiple free radical-scavenging activity of edaravone2018

    • Author(s)
      Tokumaru Osamu、Shuto Yachiko、Ogata Kazue、Kamibayashi Masato、Bacal Kira、Takei Hidehiro、Yokoi Isao、Kitano Takaaki
    • Journal Title

      Journal of Surgical Research

      Volume: 228 Pages: 147-153

    • DOI

      10.1016/j.jss.2018.03.020

    • Related Report
      2018 Research-status Report 2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 複数のフリーラジカルに対するエチルピルビン酸の濃度依存的な消去活性2020

    • Author(s)
      出村陽実,尾方和枝,徳丸治
    • Organizer
      第71回西日本生理学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Antioxidative activity of fructose 1,6-bisphosphate as a direct free radical scavenger2020

    • Author(s)
      尾方 和枝,小野可穂菜, 徳丸治
    • Organizer
      第94回日本薬理学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 電子スピン共鳴法によるデクスメデトミジンのフリーラジカル消去能の検討2019

    • Author(s)
      西田太一, 徳丸治, 松本重清, 内野哲哉, 新宮千尋, 北野敬明
    • Organizer
      日本麻酔科学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Regional difference in energy metabolism in murine hippocampus2019

    • Author(s)
      Tokumaru O, Goto M, Abe S, Tandai-Hiruma M, Maruyama S, Kemuriyama T, Ogata K, Eshima N, Kitano T, Setou M, Nishida Y
    • Organizer
      29th International Symposium on Cerebral Blood Flow, Metabolism and Function
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Antioxidative activity of dexmedetomidine as a direct free radical scavenger2019

    • Author(s)
      Kazue O, Yoshida K, Matsumoto S, Shingu C, Kitano T, Tokumaru O
    • Organizer
      第93回日本薬理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Dose-response relationship of free radical scavenging activity of dexmedetomidine2018

    • Author(s)
      Tokumaru O, Yoshida K, Ogata K, Takanari H, Kitano T
    • Organizer
      FAOPS2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Changes in correlations of energy status among cerebral regions after high +Gz acceleration2018

    • Author(s)
      Tokumaru O, Goto M, Abe S, Hiruma M, Maruyama S, Kemuriyama T, Ogata K, Kitano T, Nishida Y
    • Organizer
      89th Annual Scientific Meeting of Aerospace Medical Association
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Direct observation of ascorbyl free radicals (vitamin C radicals) in blood of perioperative animals2017

    • Author(s)
      Osamu Tokumaru, Shigekiyo Matsumoto, Takayuki Mizoguchi, Takayuki Kawashima, Kazue Ogata, Shinji Miyamoto, Takaaki Kitano
    • Organizer
      第95回日本生理学会大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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