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Effect of the regulation of bioactive lipid mediators production on the pathophysiology of intracerebral hemorrhage

Research Project

Project/Area Number 20K16138
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 48030:Pharmacology-related
Research InstitutionNagoya City University

Principal Investigator

Hijioka Masanori  名古屋市立大学, 医薬学総合研究院(医学), 助教 (50780061)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords脳内出血 / ミクログリア / 好中球 / lipoxin A4 / 生理活性脂質
Outline of Research at the Start

脳内出血時の生理活性脂質の代謝変動を制御することで、病態形成に与える影響を調べる。生理活性脂質の代謝に関わる酵素は様々であるが、本研究では、アラキドン酸の生合成を調節するモノアシルグリセロールリパーゼ(monoacylglycerol lipase: MAGL)や、DHAやEPAの代謝を調節する12/15-リポキシゲナーゼ(12/15-lipoxygenase: 12/15-LOX)の機能調節を行い、脳内出血モデルマウスの病態重篤度に与える作用を解析する。

Outline of Final Research Achievements

In intracerebral hemorrhage, microglial activation and infiltration of neutrophils exacerbate pathogenesis. Since we have previously reported that leukotriene B4 promoted them, we focused on lipid metabolism in this research. Intracerebral hemorrhage model mice received treatment with 12/15-lipoxygenase inhibitor or monoacylglycerol lipase inhibitor, but there were no changes to the pathological progression. These data suggest that contribution of lipid metabolism is small in acute phases of disease progression in intracerebral hemorrhage. On the other hand, we focused on lipoxin A4, an arachidonic acid metabolite that exerts anti-inflammatory effects. BML-111, a receptor agonist of lipoxin A4, improved motor dysfunctions after intracerebral hemorrhage. This result suggests that functional modification of anti-inflammation signaling may be effective.

Academic Significance and Societal Importance of the Research Achievements

脳内出血は脳実質内に血液が漏れ出すことで頭蓋内圧亢進や神経炎症を惹起し、不可逆的な神経変性を呈す疾患である。脳内出血の病態形成機構の詳細は未だ明らかでないことから有用な治療薬は開発されていない。本研究では出血惹起後早期の脂質代謝物の産生に注目しマウスモデルを用いた解析を実施したが、脂質代謝調節を狙った介入法では治療効果が得られなかった。一方でアラキドン酸から代謝された分子に注目し解析した結果、治療標的となりうる分子を見出した。これらの結果は、脳内出血発症後早期の脂質代謝物のシグナル伝達の調節が脳内出血の治療方策となりうることを示したものであり、今後の治療薬開発に寄与する知見だと考えている。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (3 results) (of which Invited: 1 results)

  • [Journal Article] Lipoxin A4 Receptor Stimulation Attenuates Neuroinflammation in a Mouse Model of Intracerebral Hemorrhage2022

    • Author(s)
      Futokoro Risa, Hijioka Masanori, Arata Moe, Kitamura Yoshihisa
    • Journal Title

      Brain Sciences

      Volume: 12 Issue: 2 Pages: 162-162

    • DOI

      10.3390/brainsci12020162

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] MEK/ERK Signaling Regulates Reconstitution of the Dopaminergic Nerve Circuit in the Planarian Dugesia japonica2021

    • Author(s)
      Hijioka Masanori, Ikemoto Yusuke, Fukao Kosuke, Inoue Takeshi, Kobayakawa Tatsuki, Nishimura Kaneyasu, Takata Kazuyuki, Agata Kiyokazu, Kitamura Yoshihisa
    • Journal Title

      Neurochemical Research

      Volume: - Issue: 9 Pages: 2558-2567

    • DOI

      10.1007/s11064-020-03226-5

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Microglia-released leukotriene B4 promotes neutrophil infiltration and microglial activation following intracerebral hemorrhage.2020

    • Author(s)
      Hijioka M, Futokoro R, Ohto-Nakanishi T, Nakanishi H, Katsuki H, Kitamura Y.
    • Journal Title

      Int Immunopharmacol.

      Volume: 85 Pages: 106678-106678

    • DOI

      10.1016/j.intimp.2020.106678

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Neuroprotective effects of 5-aminolevulinic acid against neurodegeneration in rat models of Parkinson's disease and stroke2020

    • Author(s)
      Hijioka Masanori, Kitamura Kanori, Yanagisawa Daijiro, Nishimura Kaneyasu, Takata Kazuyuki, Inden Masatoshi, Kitamura Yoshihisa
    • Journal Title

      Journal of Pharmacological Sciences

      Volume: 144 Issue: 3 Pages: 183-187

    • DOI

      10.1016/j.jphs.2020.07.012

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ロイコトリエンB4およびリポキシンA4産生系調節が脳内出血病態に与える作用2022

    • Author(s)
      肱岡雅宣, 懐理紗, 荒田萌衣, 香月博志, 北村佳久
    • Organizer
      日本薬学会 第142年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Stimulation of LXA4 receptor attenuates pathological changes and ensuing motor dysfunction in intracerebral hemorrhage model mouse.2020

    • Author(s)
      Futokoro Risa, Hijioka Masanori, Yoshihisa.
    • Organizer
      第43回 日本神経科学大会
    • Related Report
      2020 Research-status Report
  • [Presentation] ロイコトリエンB4およびその受容体を標的とした脳内出血治療薬の創薬研究2020

    • Author(s)
      肱岡雅宣
    • Organizer
      第70回日本薬学会関西支部大会
    • Related Report
      2020 Research-status Report
    • Invited

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Published: 2020-04-28   Modified: 2023-01-30  

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