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Clarification of the role of brain-reparative lipids for the novel concept of dyslipidemia

Research Project

Project/Area Number 21H02820
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionTokyo Medical and Dental University (2023)
Tokyo Metropolitan Institute of Medical Science (2021-2022)

Principal Investigator

Takashi Shichita  東京医科歯科大学, 難治疾患研究所, 教授 (00598443)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2023: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2022: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2021: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Keywords脳梗塞 / 神経修復 / 脳修復的脂質 / 脳卒中 / 脳卒中学 / 神経細胞 / 機能回復 / 脂質代謝物
Outline of Research at the Start

我が国では高齢化社会が進み、脳卒中患者が増加することが予想されている。脳卒中は死因の第4位、寝たきりの原因の第1位を占めており、健康寿命を短縮させる主要因となっている。本研究では、脳梗塞組織で生成される脳修復的な効果を持つ脂質に着目し、その詳細な作用機序を明らかにする。脳梗塞モデルマウスを用いて脳修復的な脂質の治療効果を証明し、治療法として確立することを目指す。

Outline of Final Research Achievements

While the brain generally struggles to regenerate after injury, our study reveals a previously unknown self-repair mechanism. We found that damaged neurons release an enzyme called PLA2G2E, which produces DGLA which is essential for activating functional recovery mechanisms after ischemic stroke. When PLA2G2E is lacking, PADI4 is also reduced, which controls the activity of genes involved in recovery after stroke. Our analysis shows that PADI4 activates these recovery genes through a process called histone citrullination. Among the various substances derived from DGLA, we identified 15-HETrE as the one responsible for stimulating PADI4 production in surviving neurons. Giving 15-HETrE to stroke-affected individuals improved their recovery. These findings highlight the brain's remarkable capacity for self-repair, triggered by specific lipids produced in response to injury. This discovery opens new avenues for developing therapies to enhance recovery after stroke and other brain injuries.

Academic Significance and Societal Importance of the Research Achievements

本研究課題によって発見できた脳修復的脂質は食事で摂取することにより脳に蓄積させることが可能である。脳機能回復を促進させる食事療法の開発のほか、実際に脳修復的脂質が不足している患者(脳梗塞、軽度認知障害、心筋梗塞、糖尿病、加齢など)が存在することが既に知られているため、脳修復作用が低下している患者をスクリーニングする診断技術、検査薬の開発が期待できる。既にPCT出願済みであり、新たな脂質異常症の概念の確立に向けた構想を練っている。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (27 results)

All 2024 2023 2022 2021

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 2 results) Presentation (17 results) (of which Int'l Joint Research: 2 results,  Invited: 13 results) Patent(Industrial Property Rights) (3 results) (of which Overseas: 2 results)

  • [Journal Article] Periportal macrophages protect against commensal-driven liver inflammation2024

    • Author(s)
      Miyamoto Yu, Ishii Masaru, et al.
    • Journal Title

      Nature

      Volume: 未定 Issue: 8013 Pages: 901-909

    • DOI

      10.1038/s41586-024-07372-6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] PLA2G2E-mediated lipid metabolism triggers brain-autonomous neural repair after ischemic stroke2023

    • Author(s)
      Nakamura Akari、Sakai Seiichiro、Taketomi Yoshitaka、Tsuyama Jun、Miki Yoshimi、Hara Yuichiro、Arai Nobutaka、Sugiura Yuki、Kawaji Hideya、Murakami Makoto、Shichita Takashi
    • Journal Title

      Neuron

      Volume: 111 Issue: 19 Pages: 2995-3010.e9

    • DOI

      10.1016/j.neuron.2023.06.024

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Neuroimmune mechanisms and therapies mediating post-ischaemic brain injury and repair2023

    • Author(s)
      Shichita Takashi、Ooboshi Hiroaki、Yoshimura Akihiko
    • Journal Title

      Nature Reviews Neuroscience

      Volume: - Issue: 5 Pages: 299-312

    • DOI

      10.1038/s41583-023-00690-0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Glial roles in sterile inflammation after ischemic stroke2023

    • Author(s)
      Koyama Ryuki、Shichita Takashi
    • Journal Title

      Neuroscience Research

      Volume: 187 Pages: 67-71

    • DOI

      10.1016/j.neures.2022.10.002

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Role of alarmins in poststroke inflammation and neuronal repair2022

    • Author(s)
      Sakai Seiichiro、Shichita Takashi
    • Journal Title

      Seminars in Immunopathology

      Volume: - Issue: 3 Pages: 427-435

    • DOI

      10.1007/s00281-022-00961-5

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Extracellular DJ-1 induces sterile inflammation in the ischemic brain.2021

    • Author(s)
      Nakamura K, Sakai S, Tsuyama J, Nakamura A, Otani K, Kurabayashi K, Yogiashi Y, Masai H, Shichita T
    • Journal Title

      PLOS Biol

      Volume: 19 Issue: 5 Pages: e3000939-e3000939

    • DOI

      10.1371/journal.pbio.3000939

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] CD300a blockade enhances efferocytosis by infiltrating myeloid cells and ameliorates neuronal deficit after ischemic stroke2021

    • Author(s)
      Nakahashi-Oda Chigusa、Fujiyama Satoshi、Nakazawa Yuta、Kanemaru Kazumasa、Wang Yaqiu、Lyu Wenxin、Shichita Takashi、Kitaura Jiro、Abe Fumie、Shibuya Akira
    • Journal Title

      Science Immunology

      Volume: 6 Issue: 64

    • DOI

      10.1126/sciimmunol.abe7915

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] 脳梗塞とマクロファージ2023

    • Author(s)
      七田 崇
    • Organizer
      第23回日本抗加齢医学会総会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 脳梗塞後に神経修復が開始されるメカニズム2023

    • Author(s)
      七田 崇
    • Organizer
      第44回日本炎症再生医学会総会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] ミクログリアによる脳梗塞後の神経修復2023

    • Author(s)
      七田 崇
    • Organizer
      第35回日本神経免疫学会学術総会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 脳梗塞後における神経修復の開始メカニズム2023

    • Author(s)
      七田 崇
    • Organizer
      第96回日本生化学会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 脳梗塞における神経修復の開始メカニズム2023

    • Author(s)
      七田 崇
    • Organizer
      第8回日本骨免疫学会ウインタースクール
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 脳梗塞後の神経修復を促進させる治療戦略2023

    • Author(s)
      七田 崇
    • Organizer
      第48回日本脳卒中学会学術集会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Molecular mechanisms triggering sterile inflammation and neural repair after ischemic stroke2022

    • Author(s)
      Takashi Shichita
    • Organizer
      MMCB2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Lipid metabolism triggering neural repair in brain ischemia2022

    • Author(s)
      Takashi Shichita
    • Organizer
      第51回日本免疫学会学術集会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 脳梗塞における神経修復のメカニズム2022

    • Author(s)
      七田 崇
    • Organizer
      第65回日本脳循環代謝学会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 脳梗塞後における炎症と修復の開始メカニズム2022

    • Author(s)
      七田 崇
    • Organizer
      第63回日本神経学会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Role of the lipids in the functional recovery after ischemic stroke.2022

    • Author(s)
      Takashi Shichita
    • Organizer
      Stroke Immunology Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Cerebral post-ischemic inflammation and lipid metabolism2021

    • Author(s)
      Takashi Shichita
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Extracellular DJ-1 plays a pivotal role in the induction of sterile inflammation after ischemic stroke2021

    • Author(s)
      中村幸太郎, 酒井誠一郎, 津山淳, 七田 崇
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 脳梗塞後の大脳新皮質における神経結合の再編と神経修復遺伝子の発現2021

    • Author(s)
      酒井誠一郎, 石渡麗依那, 七田 崇
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 脳修復作用をもつアラーミンの生成・作用機序の解明2021

    • Author(s)
      中村 朱里、酒井 誠一郎、村上 誠、七田 崇
    • Organizer
      第29回日本Cell Death学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 細胞外DJ-1は脳梗塞において無菌的な炎症を引き起こす2021

    • Author(s)
      中村幸太郎, 酒井誠一郎, 津山淳, 七田 崇
    • Organizer
      第42回日本炎症・再生医学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 脳梗塞後の炎症と修復のメカニズム2021

    • Author(s)
      七田 崇
    • Organizer
      第62回日本神経病理学会総会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Patent(Industrial Property Rights)] 脳損傷の治療用の医薬組成物2023

    • Inventor(s)
      津山 淳、七田 崇
    • Industrial Property Rights Holder
      公益財団法人東京都医学総合研究所
    • Industrial Property Rights Type
      特許
    • Filing Date
      2023
    • Related Report
      2022 Annual Research Report
  • [Patent(Industrial Property Rights)] 脳血管障害を予防または治療するための組成物2022

    • Inventor(s)
      七田 崇、村上 誠
    • Industrial Property Rights Holder
      公益財団法人東京都医学総合研究所
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2022 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 脳血管障害を予防または治療するための組成物2022

    • Inventor(s)
      七田崇、村上誠
    • Industrial Property Rights Holder
      公益財団法人東京都医学総合研究所
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2021 Annual Research Report
    • Overseas

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Published: 2021-04-28   Modified: 2025-01-30  

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